ACCUMED INTERNATIONAL INC
S-2/A, 1996-08-29
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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<PAGE>
   
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 29, 1996
    
 
   
                                                  SEC REGISTRATION NO. 333-09011
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                           --------------------------
   
                         PRE-EFFECTIVE AMENDMENT NO. 1
                                       TO
                                    FORM S-2
    
 
                             REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933
                            ------------------------
                          ACCUMED INTERNATIONAL, INC.
             (Exact name of registrant as specified in its charter)
                         ------------------------------
 
<TABLE>
<S>                              <C>                            <C>
           DELAWARE                          2835                  36-4054899
 (State or other jurisdiction    (Primary Standard Industrial   (I.R.S. Employer
              of                 Classification Code Number)     Identification
incorporation or organization)                                        No.)
</TABLE>
 
                           --------------------------
 
                      900 NORTH FRANKLIN STREET, SUITE 401
                            CHICAGO, ILLINOIS 60610
                                 (312) 642-9200
   (Address and Telephone Number of Registrant's Principal Executive Offices)
                         ------------------------------
 
                               PETER P. GOMBRICH
                            CHIEF EXECUTIVE OFFICER
                          ACCUMED INTERNATIONAL, INC.
                      900 NORTH FRANKLIN STREET, SUITE 401
                            CHICAGO, ILLINOIS 60610
                                 (312) 642-9200
          (Name, Address, and Telephone Number, of Agent for Service)
                         ------------------------------
 
                                   COPIES TO:
 
   
<TABLE>
<S>                                                  <C>
               GILLES S. ATTIA, ESQ.
               KEVIN A. COYLE, ESQ.                             CHARLES W. MULANEY, JR., ESQ.
                GRAHAM & JAMES LLP                          SKADDEN, ARPS, SLATE, MEAGHER & FLOM
           400 CAPITOL MALL, SUITE 2400                       333 WEST WACKER DRIVE, SUITE 2100
           SACRAMENTO, CALIFORNIA 95814                            CHICAGO, ILLINOIS 60606
             FACSIMILE: (916) 441-6700                            FACSIMILE: (312) 407-0411
             TELEPHONE: (916) 558-6700                            TELEPHONE: (312) 407-0700
</TABLE>
    
 
    Approximate  date of commencement of proposed sale to the public: as soon as
practicable on or after the effective date of this Registration Statement.
 
    If any of the securities being registered on this form are to be offered  on
a  delayed or continuous basis pursuant to  Rule 415 under the Securities Act of
1933, check the following box. [  ]
 
    If  the  registrant  elects   to  deliver  its   latest  annual  report   to
security-holders,  or a complete and legible facsimile thereof, pursuant to Item
11(a)(1) of this form, check the following box. [  ]
 
    If this Form  is filed  to register  additional securities  for an  offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and  list  the  Securities  Act registration  statement  number  of  the earlier
effective registration statement for the same offering. [  ]
 
    If this Form  is a post-effective  amendment filed pursuant  to Rule  462(c)
under  the Securities Act, check  the following box and  list the Securities Act
registration statement number  of the earlier  effective registration  statement
for the same offering. [  ]  ________
 
    If  delivery of the prospectus is expected  to be made pursuant to Rule 434,
please check the following box. [  ]
                           --------------------------
 
   
    THE REGISTRANT HEREBY  AMENDS THIS  REGISTRATION STATEMENT ON  SUCH DATE  OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE  A  FURTHER  AMENDMENT  WHICH  SPECIFICALLY  STATES  THAT  THE REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE  IN ACCORDANCE WITH SECTION 8(a)  OF
THE  SECURITIES ACT  OF 1933  OR UNTIL  THE REGISTRATION  STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION  8(a),
MAY DETERMINE.
    
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
INFORMATION   CONTAINED  HEREIN  IS  SUBJECT   TO  COMPLETION  OR  AMENDMENT.  A
REGISTRATION STATEMENT  RELATING TO  THESE SECURITIES  HAS BEEN  FILED WITH  THE
SECURITIES  AND EXCHANGE  COMMISSION. THESE SECURITIES  MAY NOT BE  SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR  TO THE TIME THE REGISTRATION STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE AN  OFFER  TO  SELL  OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN  ANY STATE IN WHICH SUCH OFFER,  SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
   
                 PRELIMINARY PROSPECTUS, DATED AUGUST 29, 1996
    
 
PROSPECTUS
                                4,750,000 SHARES
 
                                     [LOGO]
 
                                  COMMON STOCK
 
   
    Of the 4,750,000  shares of  Common Stock offered  hereby (the  "Offering"),
2,831,455 shares are being sold by AccuMed International, Inc. ("AccuMed" or the
"Company")  and 1,918,545 shares are being  sold by certain selling stockholders
of the Company (the "Selling Stockholders"). The Company will not receive any of
the  proceeds  from  the  sale  of  shares  of  Common  Stock  by  the   Selling
Stockholders. See "Principal and Selling Stockholders."
    
 
   
    The Common Stock is quoted on the Nasdaq Market under the symbol "ACMI." The
Common Stock has been approved for quotation on the Nasdaq National Market under
the  symbol "ACMI," subject to commencement of the Offering. On August 27, 1996,
the last reported sale price of the Common Stock on the Nasdaq Market was  $6.50
per share. See "Price Range of Common Stock."
    
 
   
    THE  COMMON STOCK OFFERED HEREBY  INVOLVES A HIGH DEGREE  OF RISK. SEE "RISK
FACTORS," BEGINNING ON PAGE 6.
    
 
   
    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
         AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR
            HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE
               SECURITIES COMMISSION PASSED UPON THE ACCURACY OR
                ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION
                     TO THE CONTRARY IS A CRIMINAL OFFENSE.
    
 
<TABLE>
<CAPTION>
                                                     UNDERWRITING                       PROCEEDS TO
                                                     DISCOUNTS AND     PROCEEDS TO        SELLING
                                   PRICE TO PUBLIC  COMMISSIONS (1)    COMPANY (2)     STOCKHOLDERS
 Per Share.......................         $                $                $                $
<S>                                <C>              <C>              <C>              <C>
 Total(3)........................         $                $                $                $
</TABLE>
 
(1) The  Company and  the  Selling Stockholders  have  agreed to  indemnify  the
    Underwriters  against certain  liabilities, including  liabilities under the
    Securities Act of 1933, as amended. See "Underwriting."
   
(2) Before deducting expenses of the Offering payable by the Company,  estimated
    at $780,850.
    
(3)  The Company has granted the Underwriters  a 30-day option to purchase up to
    an aggregate of 712,500 additional shares of Common Stock on the same  terms
    and  conditions set forth above, solely to cover over-allotments, if any. If
    such option is exercised  in full, the total  Price to Public,  Underwriting
    Discounts  and  Commissions, Proceeds  to Company,  and Proceeds  to Selling
    Stockholders will be $      , $      , $     and  $     , respectively.  See
    "Underwriting."
                           --------------------------
 
    The  shares of Common Stock offered by the Underwriters are subject to prior
sale,  receipt  and  acceptance  by  them  and  subject  to  the  right  of  the
Underwriters  to  reject  any  order  in whole  or  in  part  and  certain other
conditions. It is  expected that delivery  of such  shares will be  made at  the
offices  of the agent of Vector Securities  International, Inc. in New York, New
York on or about             , 1996.
 
                            ------------------------
 
Vector Securities International, Inc.  Tucker Anthony
                                                                Incorporated
 
          , 1996
<PAGE>
   
                           [GRAPHIC]
 
    The graphic consists  of two  photographs. The  first photograph  is of  the
TracCell-TM-  2000 automated specimen maping  workstation along with the caption
"TracCell-TM- automated specimen maping workstation (pictured right),  currently
in development."
    
 
    The second photograph is of the AcCell-TM- 2001 automated slide-handling and
microscopy  workstation  along  with  the  caption  "AcCell-TM-  2001  automated
slide-handling and microscopy workstation (pictured left)."
 
   
    The TracCell 2000 has not been approved  by the United States Food and  Drug
Administration  (the "FDA")  or any other  regulatory authority for  sale in the
United States or  elsewhere in the  world. There  can be no  assurance that  the
TracCell 2000 will be approved by the FDA or any foreign regulatory authority on
a timely basis, if ever. See "Risk Factors -- Government Regulation."
    
 
   
    The  following are trade  names and trademarks  of the Company  used in this
Prospectus: the "Alamar" logo and  name, alamarBlue-TM-, AccuMed, Inc.,  AccuMed
International,  Inc.,  the "AccuMed"  logo  and name,  AcCell-TM-, TracCell-TM-,
MacroVision-TM-,  Sensititre-Registered  Trademark-,  SensiTouch-TM-,  ARIS-TM-,
AutoReader-TM-, AutoInnoculator-TM- Relational Cytopathology Reference Guide-TM-
and  FluoreTone-TM-  48.  This  Prospectus  also  contains  trademarks  of other
companies.
    
 
                           --------------------------
 
               SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
 
    Certain statements under the captions "Prospectus Summary," "Risk  Factors,"
"Use  of Proceeds," "Management's Discussion and Analysis of Financial Condition
and Results  of Operations"  and  "Business" and  elsewhere in  this  Prospectus
constitute  "forward-looking  statements"  within  the  meaning  of  the Private
Securities  Litigation   Reform   Act  of   1995   (the  "Reform   Act").   Such
forward-looking  statements involve  known and unknown  risks, uncertainties and
other factors which may cause the actual results, performance or achievements of
the Company, or  industry results, to  be materially different  from any  future
results,   performance   or   achievements   expressed   or   implied   by  such
forward-looking statements.  Such  factors  include,  among  other  things,  the
following: the Company's history of losses and uncertainty of profitability; the
uncertainty  of  market  acceptance  of the  Company's  products;  the Company's
limited  sales,  marketing  and   distribution  experience  and  dependence   on
distributors;  the Company's highly competitive industry and rapid technological
change  within  such  industry;  the  Company's  ability  to  obtain  rights  to
technology  and obtain  and enforce  patents and  other proprietary  rights; the
Company's ability  to commercialize  and manufacture  products; the  results  of
clinical  studies;  the  results  of  the  Company's  research  and  development
activities; the business
 
                                       2
<PAGE>
abilities and judgment of the Company's personnel; the availability of qualified
personnel; changes in, or failure to comply with, governmental regulations;  the
ability  to  obtain  adequate  financing in  the  future;  general  and business
conditions; and other factors referenced in this Prospectus. See "Risk Factors."
 
    IN CONNECTION WITH THE OFFERING,  THE UNDERWRITERS MAY OVER-ALLOT OR  EFFECT
TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE COMMON STOCK OF
THE  COMPANY AT  A LEVEL ABOVE  THAT WHICH  MIGHT OTHERWISE PREVAIL  IN THE OPEN
MARKET. SUCH STABILIZING, IF COMMENCED, MAY BE DISCONTINUED AT ANY TIME.
 
                                       3
<PAGE>
                               PROSPECTUS SUMMARY
 
    THE  FOLLOWING SUMMARY  IS QUALIFIED  IN ITS  ENTIRETY BY  THE MORE DETAILED
INFORMATION AND  FINANCIAL STATEMENTS  APPEARING ELSEWHERE  IN THIS  PROSPECTUS,
INCLUDING  INFORMATION  UNDER "RISK  FACTORS."  EXCEPT AS  OTHERWISE  NOTED, ALL
INFORMATION IN THIS  PROSPECTUS, INCLUDING FINANCIAL  INFORMATION AND SHARE  AND
PER  SHARE DATA, ASSUMES NO EXERCISE OF THE UNDERWRITERS' OVER-ALLOTMENT OPTION.
SEE "UNDERWRITING." SPECIAL NOTE: CERTAIN STATEMENTS SET FORTH BELOW  CONSTITUTE
"FORWARD-LOOKING  STATEMENTS" WITHIN THE MEANING OF THE REFORM ACT. SEE "SPECIAL
NOTE REGARDING  FORWARD-LOOKING STATEMENTS"  ON PAGE  2 FOR  ADDITIONAL  FACTORS
RELATING TO SUCH STATEMENTS.
 
                                  THE COMPANY
 
   
    AccuMed  designs, manufactures and markets diagnostic screening products for
clinical diagnostic  laboratories  serving the  cytopathology  and  microbiology
markets.  The Company's  primary focus  is on  the development  of cytopathology
products that support the review and analysis of Pap smears in order to  improve
the  quality  of cell  analysis and  increase accuracy  and productivity  in the
laboratory. The Company  commenced sales of  its initial cytopathology  product,
the  AcCell-TM- Series 2000 automated slide handling and microscopy workstation,
at the end  of the first  quarter of 1996.  The Company is  currently testing  a
prototype   specimen   mapping   workstation,  the   TracCell-TM-   2000,  which
automatically pre-screens Pap smear slides to identify and create a computerized
map of empty space and certain non-clinically relevant portions of the  specimen
to  permit a more efficient  analysis of the test  slide. The Company expects to
file a 510(k) pre-market notification with the FDA for the TracCell 2000 by  the
end  of 1996. The  Company has recently  entered into an  agreement with Olympus
America Inc.  ("Olympus America"),  a  leading supplier  of microscopes  to  the
cytopathology  market,  pursuant to  which Olympus  America has  exclusive third
party distribution  rights  to  the  AcCell Series  2000  and,  if  successfully
developed  and cleared for marketing by  the FDA and other applicable regulatory
authorities, the TracCell 2000 in North, Central and South America.
    
 
   
    An estimated  440,000 new  cases of  cervical cancer  are reported  annually
worldwide.  The American Cancer Society estimates  that, in the United States in
1996, 15,700 women  will be diagnosed  with invasive cervical  cancer and  4,900
women  will die  of cervical cancer.  Furthermore, in 1996,  an estimated 65,000
American women will be diagnosed with cervical carcinoma IN SITU, a precancerous
condition. However,  virtually  all cervical  cancer  cases can  be  effectively
treated  with timely intervention if detected  early. The Pap smear is currently
the most widely-used screening test for  early detection of cervical cancer  and
related  precancerous conditions. It is estimated  that in 1996 over 150 million
Pap smear specimens will be screened worldwide, including over 50 million in the
United States. According to the American Cancer Society, widespread and  regular
use  of the Pap smear as  a screening test is believed  to have contributed to a
greater than 70% decrease in mortality from cervical cancer in the United States
in the past 45 years.
    
 
   
    Initial Pap smear  testing is performed  by specially trained  professionals
known  as cytotechnologists, who use a microscope  to screen and interpret up to
100 Pap smear slides per day. In  general, this process is complex and  tedious,
and  is prone to error.  Over 90% of specimens  reviewed are negative. Even non-
negative specimens may contain only 20 to 30 abnormal cells out of a total of as
many as 50,000 to 300,000 cells on the slide. As a result, slide  interpretation
errors  can be  caused by  fatigue of  the cytotechnologist  and the habituation
effect of constantly viewing predominantly negative specimens. According to  the
JOURNAL  OF THE  AMERICAN MEDICAL  ASSOCIATION, clinical  laboratories generally
experience false negative Pap smear diagnosis  rates of 5% to 30%. In  addition,
conventional  Pap smear testing is subject  to administrative errors and exposes
clinical laboratories to the risk of litigation and consequent liability.
    
 
   
    The Company's cytopathology products are intended to provide  cost-effective
solutions  to many  of the  problems of  conventional Pap  smear testing without
significantly modifying  existing  laboratory practices.  The  Company's  AcCell
Series 2000 workstation is an interactive computer-controlled slide handling and
precision  microscopy workstation  that is  supported with  a comprehensive data
management system. The TracCell 2000,  currently under development, is  designed
to   automatically  pre-screen  Pap  smear  slides  to  identify  and  create  a
computerized map of  empty space and  certain non-clinically relevant  material.
Tests  conducted by the Company suggest that  the TracCell 2000, by locating and
mapping such empty space and non-clinically relevant material, can eliminate 15%
to 50% of  the slide area  required to  be reviewed by  a cytotechnologist.  The
Company  believes that  the AcCell  Series 2000 and  the TracCell  2000 have the
potential to reduce  cytotechnologist fatigue and  habituation, reduce the  time
needed  to evaluate specimens,  and allow the cytotechnologist  to focus on more
thoroughly evaluating potential  abnormalities. The Company  is also  developing
software  and hardware  for a  second generation,  fully automated,  high volume
mapping product,  the TracCell  3000,  and is  developing  a series  of  related
educational  and  testing products.  There  can be  no  assurance that  any such
products will be successfully developed or marketed.
    
 
                                       3
<PAGE>
   
    The Company  also develops,  manufactures and  markets IN  VITRO  diagnostic
microbiology products for the clinical laboratory, veterinary and pharmaceutical
markets. The Company offers the microbiology laboratory a variety of FDA-cleared
products, under the trade name Sensititre-Registered Trademark-, for the minimum
inhibitory  concentration  and  identification  ("MIC/ID")  testing  of bacteria
suspected of causing  infections and  for measuring the  susceptibility of  such
bacteria  to  different  types  and  concentrations  of  antibiotics.  AccuMed's
microbiology products  include disposable  test kits  and a  range of  automated
instruments.  The Company also markets  alamarBlue-TM-, a proprietary, non-toxic
indicator reagent that measures cell growth for IN VITRO testing. The Company is
developing an automated instrument designed to read the results of a Kirby-Bauer
method susceptibility test (the "KB Reader") and, pursuant to an agreement  with
RADCO  Ventures,  Inc.  ("RADCO"), a  joint-venture  formed by  the  Company and
certain  investors,   is  developing   the  FluoreTone-TM-   48,  a   diagnostic
microbiology  test panel  and an automated  reading instrument. There  can be no
assurance that any such products will be successfully developed or marketed.
    
 
   
    AccuMed's objective is to establish the AcCell Series 2000 and the  TracCell
2000  as  the  leading microscopy  workstations  for the  primary  screening and
analysis of  cytology specimens  while developing  other new  cytopathology  and
microbiology  products. The key elements of  the Company's strategy include: (i)
establishing the AcCell Series 2000 and, if cleared for marketing by the FDA and
other applicable regulatory authorities, the TracCell 2000 in the worldwide  Pap
smear  screening market through distribution  agreements and strategic alliances
with major  market  participants, (ii)  exploiting  other applications  for  the
Company's  cytopathology technology  such as histology  and pathology laboratory
work, (iii)  continuing  to  acquire,  develop  and  enhance  technologies  that
complement  the  Company's existing  technology  base and  (iv)  integrating the
Company's proprietary microbiology technologies into new products.
    
 
   
    In August 1996, the Company entered into definitive agreements to acquire  a
two-thirds  equity  interest in  Oncometrics  Imaging Corp.  ("Oncometrics") for
aggregate consideration of $4.0 million in cash (the "Oncometrics Acquisition").
Of such  consideration,  $2.0 million  is  to  be paid  to  Oncometrics'  parent
company,   Xillix  Technologies  Corp.  ("Xillix"),  for  currently  outstanding
Oncometrics stock and $2.0 million is to be paid to Oncometrics for newly issued
Oncometrics stock. Oncometrics is developing an automated instrument designed to
capture and analyze images from microscope  slides that have been stained  using
Oncometrics'   proprietary  staining  method.   Prototypes  of  the  Oncometrics
instrument have been developed which  are capable of isolating small  variations
in  cell nucleus  DNA, which can  assist the cytotechnologist  in detecting lung
cancer in  an  early  stage  of  development.  The  Company  believes  that  the
Oncometrics  technology may potentially have applications in the early detection
of cervical cancer  as well. In  August 1996,  the Company also  entered into  a
definitive  agreement to acquire the outstanding shares of common stock of RADCO
and retire approximately $1.2 million  in aggregate principal amount of  certain
promissory  notes sold by RADCO to its  initial investors (the "RADCO Notes") at
an aggregate cost  to the  Company of approximately  $1.4 million  in cash  (the
"RADCO Acquisition"). Such acquisitions are contingent upon, among other things,
consummation  of the Offering. See "Use of Proceeds," "Business -- Cytopathology
- -- Potential Acquisition  of Interest  in Oncometrics" and  "-- Microbiology  --
Potential Acquisition of RADCO."
    
 
                                   BACKGROUND
 
   
    The  Company  was incorporated  in California  in June  1988 under  the name
Alamar Biosciences, Inc. Prior to December 29, 1995, the Company was engaged  in
developing,   manufacturing  and  marketing   microbiology  products,  including
alamarBlue and  certain diagnostic  test kits  under the  name Alamar.  AccuMed,
Inc.,  an Illinois corporation, was  formed in February 1994  and was engaged in
researching and  developing  cytopathology  products.  Effective  January  1995,
AccuMed,  Inc.  acquired  the  Sensititre  microbiology  business  by purchasing
certain assets of  a division of  Radiometer America, Inc.  and purchasing  from
Radiometer  (UK) Limited  all of  the shares  of Sensititre  Limited, an English
registry company  (renamed  AccuMed  International  Limited,  "Sensititre,"  and
collectively,  such businesses are referred to  as "AccuMed, Inc."). On December
29, 1995, AccuMed,  Inc. merged with  and into the  Company (the "Merger").  The
Company  then changed  its name  to AccuMed  International, Inc., reincorporated
under Delaware law and changed its fiscal year end from September 30 to December
31. The Company  is currently  seeking to enter  into an  agreement pursuant  to
which  a  third  party  would  manufacture  the  Company's  Alamar  microbiology
products, other than alamarBlue. However, there can be no assurance that such an
agreement can  be reached.  If such  an agreement  is not  reached, the  Company
intends to cease manufacturing such products.
    
 
    The  Company's principal executive offices are located at 900 North Franklin
Street, Suite 401, Chicago,  Illinois 60610, and its  telephone number is  (312)
642-9200.
 
                                       4
<PAGE>
                                  THE OFFERING
 
   
<TABLE>
<CAPTION>
Common Stock offered by:
<S>                                                <C>
  The Company....................................  2,831,455 shares
  The Selling Stockholders.......................  1,918,545 shares
Common Stock to be outstanding after the           22,279,988 shares (1)
 Offering........................................
Use of proceeds by the Company...................  To fund product research and development; scale-up
                                                   of manufacturing; the Oncometrics Acquisition; the
                                                   RADCO Acquisition; and working capital and general
                                                   corporate   purposes,   including   reduction   in
                                                   accounts payable. See "Use of Proceeds."
Nasdaq Market symbol.............................  ACMI
Nasdaq National Market symbol....................  ACMI
</TABLE>
    
 
                      SUMMARY CONSOLIDATED FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
   
<TABLE>
<CAPTION>
                                                                             THREE MONTH
                                                          FISCAL              TRANSITION
                                                        YEAR ENDED           PERIOD ENDED               SIX MONTHS ENDED
                                                    SEPTEMBER 30, 1995    DECEMBER 31, 1995               JUNE 30, 1996
                                                    -------------------   ------------------   -----------------------------------
                                                       PRO FORMA (2)        PRO FORMA (2)           ACTUAL         PRO FORMA (2)
                                                    -------------------   ------------------   ----------------   ----------------
<S>                                                 <C>                   <C>                  <C>                <C>
STATEMENT OF OPERATIONS DATA:
  Sales...........................................        $ 4,144              $ 1,184            $       2,312      $ 2,318
  Operating loss..................................         (7,056)              (7,060)(3)           (6,736)(3)       (7,308)(3)
  Net loss........................................         (6,740)              (7,077)                 (4,619)       (5,018)
  Net loss per common share.......................          (0.69)               (0.60)                  (0.28)        (0.31)
  Weighted average common shares outstanding......          9,832               11,743                   16,319       16,319
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                         DECEMBER 31,           JUNE 30, 1996
                                                                             1995       ------------------------------
                                                                         -------------                    PRO FORMA
                                                                            ACTUAL         ACTUAL      AS ADJUSTED (4)
                                                                         -------------  -------------  ---------------
<S>                                                                      <C>            <C>            <C>
BALANCE SHEET DATA:
  Working capital (deficit)............................................    $  (2,459)     $     572       $  15,061
  Total assets.........................................................        5,974          8,720          26,822
  Long-term debt, net of current portion (5)...........................           90             45             272
  Total stockholders' equity...........................................          729          5,487          22,550
</TABLE>
    
 
- ------------------------------
 
   
(1) Based upon shares  outstanding at August 27,  1996, of which 940,955  shares
    are  subject to forfeiture if certain  specified earnings per share or stock
    price performance  thresholds are  not  met during  1997. Excludes:  (i)  an
    aggregate  of  5,917,605  shares  reserved  for  issuance  upon  exercise of
    warrants outstanding at  August 27,  1996 (except for  480,402 shares  which
    will  be issued upon exercise prior to consummation of the Offering and sold
    in the Offering) with a weighted average exercise price of $3.21 per  share;
    (ii)  an  aggregate  of  1,602,971 shares  reserved  for  issuance  upon the
    exercise of stock options outstanding at August 27, 1996 (except for 109,395
    shares which  will be  issued upon  exercise prior  to consummation  of  the
    Offering and sold in the Offering) with a weighted average exercise price of
    $2.77  per  share; and  (iii) an  aggregate of  543,741 shares  reserved for
    issuance upon  exercise of  options  available for  future grant  under  the
    Company's  stock option plans. See  "Management's Discussion and Analysis of
    Financial Condition and Results of Operations," "Management -- Stock  Option
    Plans" and Note 11 of Notes to Consolidated Financial Statements.
    
 
(2)  Includes the operating  results of AccuMed,  Inc. and Oncometrics  on a pro
    forma basis  assuming  that  the  Merger  and  the  Oncometrics  Acquisition
    occurred  on  October 1,  1994. See  "The Company"  and Pro  Forma Condensed
    Combining Financial Statements.
 
   
(3) Includes $4.0 million and $3.5 million for the three month transition period
    ended December 31, 1995  and six months ended  June 30, 1996,  respectively,
    recorded  as a non-cash charge against  operations relating to the write-off
    of in-process  research  and development  acquired  in connection  with  the
    Merger. See "Management's Discussion and Analysis of Financial Condition and
    Results of Operations."
    
 
   
(4)  Includes the net  assets of Oncometrics and  RADCO assuming the Oncometrics
    Acquisition and the RADCO Acquisition occurred on June 30, 1996. Adjusted to
    reflect the receipt  and application of  the net proceeds  from the sale  of
    2,831,455 shares of Common Stock offered by the Company hereby at an assumed
    offering  price  of $6.50  per share,  and  the receipt  of proceeds  to the
    Company of  approximately  $728,000  in  connection  with  the  exercise  of
    outstanding  stock options and warrants to  purchase an aggregate of 589,797
    shares of Common  Stock to be  sold by certain  Selling Stockholders in  the
    Offering.  See "Use of  Proceeds," "Principal and  Selling Stockholders" and
    "Description of Capital Stock."
    
 
   
(5) Long-term debt consists of capital  lease obligations. See Note 13 of  Notes
    to Consolidated Financial Statements.
    
 
                                       5
<PAGE>
                                  RISK FACTORS
 
    AN  INVESTMENT IN THE SHARES OF COMMON  STOCK OFFERED HEREBY INVOLVES A HIGH
DEGREE OF RISK.  PROSPECTIVE INVESTORS SHOULD  CAREFULLY CONSIDER THE  FOLLOWING
RISK  FACTORS, IN ADDITION TO THE  OTHER INFORMATION IN THIS PROSPECTUS. SPECIAL
NOTE: CERTAIN STATEMENTS SET FORTH BELOW CONSTITUTE "FORWARD-LOOKING STATEMENTS"
WITHIN  THE   MEANING  OF   THE  REFORM   ACT.  SEE   "SPECIAL  NOTE   REGARDING
FORWARD-LOOKING  STATEMENTS" ON PAGE  2 FOR ADDITIONAL  FACTORS RELATING TO SUCH
STATEMENTS.
 
   
    LIMITED  RELEVANT   OPERATING   HISTORY;   SIGNIFICANT   OPERATING   LOSSES;
ACCUMULATED   DEFICIT;  SUBSTANTIAL  COSTS  OF  INTEGRATION  AND  CONSOLIDATION;
UNCERTAINTY OF PROFITABILITY.   The Company  was formed in  1988 under the  name
Alamar  Biosciences, Inc. and was engaged  primarily in research and development
of microbiology  products  based on  the  alamarBlue technology.  Prior  to  the
Merger,  the Company never realized any significant revenues from product sales.
AccuMed, Inc. was  incorporated in  February 1994 and,  effective January  1995,
acquired  the Sensititre microbiology business. Until such acquisition, AccuMed,
Inc.  had  no  revenues  and  operations  consisted  of  a  limited  amount   of
cytopathology  research  and development.  Accordingly, although  the Sensititre
business had a significant operating  history and revenues from sales,  AccuMed,
Inc.,  as a  separate entity,  had very limited  operating history  prior to the
Merger. Upon  consummation of  the Merger,  the operations  of the  Company  and
AccuMed,  Inc. were combined, and the  Company began to develop, manufacture and
sell both the alamarBlue and  the Sensititre microbiology products and  recently
began to commercialize certain AccuMed cytopathology products. Thus, the Company
has  a  limited  relevant operating  history  upon  which an  evaluation  of its
prospects can be made. Such prospects must be considered in light of the  risks,
expenses  and difficulties frequently encountered in establishing a new business
in a continually evolving industry with an increasing number of market  entrants
and  intense  competition  as  well  as  the  risks,  expenses  and difficulties
encountered in the shift from  development to commercialization of new  products
based on innovative technology.
    
 
   
    The  Company has  incurred significant net  operating losses  in each fiscal
quarter since its inception. For the  fiscal years ended September 30, 1994  and
1995,  and for the transition period ended  December 31, 1995 and the six months
ended June 30, 1996, the Company's net operating losses were approximately  $3.1
million,  $3.8 million, $5.7 million and  $4.6 million, respectively. Losses for
the fiscal years ended September 30, 1994 and 1995 and for the transition period
ended December 31, 1995 relate solely  to the Company's operations prior to  the
Merger.  As  of  June  30,  1996, the  Company  had  an  accumulated  deficit of
approximately $27.4 million. Losses are expected to continue for the foreseeable
future until such time, if ever, as  the Company is able to attain sales  levels
sufficient to support its operations. There can be no assurance that the Company
will  be  able  to  implement  successfully  its  operating  strategy,  generate
increased revenues or ever achieve profitable operations. See "-- Uncertainty of
Market Acceptance and Initial Investment in Cytopathology Products."
    
 
   
    UNCERTAINTY OF  MARKET ACCEPTANCE  AND INITIAL  INVESTMENT IN  CYTOPATHOLOGY
PRODUCTS.   The  Company has  generated limited  revenues from  the sale  of its
cytopathology products to date. The Company's success, growth and  profitability
will  depend primarily on  market acceptance of  the AcCell Series  2000 and the
TracCell 2000,  if  cleared  for  marketing by  the  FDA  and  other  applicable
regulatory  authorities, for use in connection with cervical cancer screening by
cytopathology laboratories.  Market  acceptance  will depend  on  the  Company's
ability to demonstrate to such laboratories that the limitations associated with
conventional  Pap smear screening and analysis can be cost effectively addressed
by its products. There can be no assurance that the Company can demonstrate that
the high initial cost of equipping existing laboratories with the AcCell  Series
2000  and  the TracCell  2000, if  cleared for  marketing, will  be offset  by a
reduction  in  costs   associated  with  increased   efficiency  and   decreased
malpractice  liability risks resulting from more accurate diagnoses, better data
management capability and better documentation  of slide review procedures.  The
Company  believes that many clinical laboratories offer Pap smear tests at lower
gross margins than  other tests  in order to  receive orders  for other,  higher
margin, laboratory tests. As a result, clinical laboratories may be reluctant or
unwilling to accept the additional costs related to installing and utilizing the
AcCell  Series 2000  and the  TracCell 2000.  Furthermore, clinical laboratories
have recently been presented with a  variety of new products claimed to  improve
the cervical cancer
    
 
                                       6
<PAGE>
screening   process  either  through  changing  the  slide  preparation  method,
automating  the  re-examination   or  rescreening   of  conventional   specimens
previously diagnosed as negative or rescreening such specimens using reagents to
detect certain RNA/DNA hybrid cells claimed to indicate the presence of cervical
cancer.  This  proliferation of  competing  claims, products  and  approaches to
cervical cancer screening  may cause market  confusion which could  result in  a
laboratory  maintaining  its  current  equipment  and  practices  or  delaying a
decision of whether to purchase the  Company's products or a competing  product.
See "-- Technological Change and Competition."
 
   
    LIMITED  NUMBER  OF  CUSTOMERS.    Due in  part  to  a  recent  trend toward
consolidation of clinical laboratories, the  Company expects that the number  of
potential  domestic customers for its  cytopathology products will decrease. Due
to the relative  size of  the largest  U.S. laboratories,  it is  likely that  a
significant  portion of  the sales  of the AcCell  Series 2000  and the TracCell
2000, if cleared for  marketing, will be concentrated  among a relatively  small
number  of customers. In order to promote  acceptance in the market, the Company
will need to foster an awareness of and acceptance by these potential  customers
of  the AcCell  Series 2000 and  the TracCell 2000  and of the  benefits of such
systems over  current  methods.  The  Company's dependence  on  sales  to  large
laboratories   may  strengthen  the  purchasing   leverage  of  these  potential
customers. There can  be no  assurance that the  Company will  be successful  in
selling  its products, or that any such  sales will result in sufficient revenue
to allow the Company to become profitable.
    
 
   
    DELAYED OR  UNSUCCESSFUL  PRODUCT DEVELOPMENT.    The Company's  growth  and
profitability  will depend, in part, upon its ability to complete development of
and successfully  introduce  new  products, including  the  TracCell  2000.  The
Company   will  likely  be  required  to  undertake  time-consuming  and  costly
development activities and seek regulatory approval for new products. There  can
be  no assurance  that the Company  will not experience  difficulties that could
delay or prevent the successful  development, introduction and marketing of  new
products,  that regulatory  clearance or approval  of these or  any new products
will be  granted on  a timely  basis, if  ever, or  that the  new products  will
adequately  meet the  requirements of  the applicable  market or  achieve market
acceptance. The completion of the development  of any of the Company's  products
under  development  remains  subject  to  all  the  risks  associated  with  the
commercialization of new  products based on  innovative technologies,  including
unanticipated  technical or  other problems, manufacturing  difficulties and the
possible insufficiency  of  the  funds  allocated for  the  completion  of  such
development,  which  could  result in  a  change  in the  design,  delay  in the
development or the abandonment of such  products. Consequently, there can be  no
assurance  that  any  of  the  Company's  products  under  development  will  be
successfully developed or manufactured or,  if developed and manufactured,  that
such  products  will meet  price or  performance objectives,  be developed  on a
timely basis or prove to be as effective as competing products. The inability to
successfully  complete  development   of  a   product  or   application,  or   a
determination  by the Company, for financial, technical or other reasons, not to
complete development of any product or application, particularly in instances in
which the  Company  has made  significant  capital expenditures,  could  have  a
material  adverse  effect on  the  Company's business,  financial  condition and
results of  operations and  could cause  the Company  to reassess  its  business
strategy.  Such  reassessment could  lead to  changes  in the  Company's overall
business plan, including the  relative emphasis on current,  as well as  future,
products.   See  "--  Government  Regulation,"  "Business  --  Cytopathology  --
Cytopathology Products" and "-- Microbiology -- Microbiology Products."
    
 
   
    LIMITED SALES, MARKETING  AND DISTRIBUTION EXPERIENCE;  DEPENDENCE ON  THIRD
PARTY  DISTRIBUTORS.  In order for the  Company to increase revenues and achieve
profitability, the  Company's products,  particularly its  current and  proposed
cytopathology  products, must achieve a significant degree of market acceptance.
The Company has only limited experience marketing and selling its  cytopathology
products. The Company intends to distribute its cytopathology products primarily
through  a limited number of distributors. The Company has only recently entered
into its  only current  distribution arrangement  with respect  to  cytopathlogy
products,  which is an  exclusive, three year  distribution agreement for North,
Central and South America  (the "Olympus Territory")  with Olympus America.  The
Company  will be required to enter  into additional distribution arrangements in
order to achieve broad distribution of its
    
 
                                       7
<PAGE>
   
cytopathology products. There can be no assurance that the Company will be  able
to  maintain  the  distribution arrangement  with  Olympus America  or  that the
Company will be  able to enter  into and maintain  arrangements with  additional
distributors  on acceptable terms,  or on a  timely basis, if  ever. The Company
will be  dependent upon  these distributors  to assist  it in  promoting  market
acceptance  of and  demand for  its products.  In addition,  because the Company
intends to rely on a limited number of distributors, sales to these distributors
could account for a significant portion of the Company's revenues. There can  be
no  assurance that  these distributors  will devote  the resources  necessary to
provide effective sales and marketing support  to the Company. In addition,  the
Company's distributors may give higher priority to the products of other medical
suppliers  or  their  own products,  thus  reducing  their efforts  to  sell the
Company's products. If any  of the Company's  distributors becomes unwilling  or
unable  to  promote,  market  and sell  its  products,  the  Company's business,
financial condition  and results  of operations  would be  materially  adversely
affected.  Further, Olympus America  is the exclusive  distributor of the AcCell
Series 2000  and,  if successfully  developed  and cleared  for  marketing,  the
TracCell  2000  in the  Olympus Territory,  and other  distributors also  may be
granted exclusive distribution rights. To  the extent any exclusive  distributor
fails to adequately promote, market and sell the Company's products, the Company
may  not be able to secure a replacement distributor until after the term of the
distribution contract  is  complete or  until  such contract  can  otherwise  be
terminated.
    
 
   
    TECHNOLOGICAL  CHANGE  AND COMPETITION.   The  Company's AcCell  Series 2000
currently faces and the TracCell 2000, if successfully developed and cleared for
marketing, will face competition  from companies that have  developed or may  be
developing  competing systems. The  Company believes that  many of the Company's
existing and  potential  competitors possess  substantially  greater  financial,
marketing,  sales, distribution  and technical  resources than  the Company, and
more  experience  in  research  and  development,  clinical  trials,  regulatory
matters, manufacturing and marketing. The Company is aware of two companies that
currently  market  imaging systems  to re-examine  or rescreen  conventional Pap
smear specimens previously diagnosed as negative  as well as two companies  that
are developing devices for the preparation and analysis of Pap smear slides. The
Company  is aware that at least one such company has submitted an imaging system
for use as  a primary means  of screening  Pap smear slides  under a  pre-market
approval application (a "PMA") to the FDA under the United States Food, Drug and
Cosmetic Act (the "FD&C Act"). Another company markets a manual rescreening test
claimed  to  detect the  presence of  cervical cancer  using reagents  to detect
certain RNA/DNA hybrid  cells. If  any company  currently marketing  rescreening
products  receives FDA clearance or approval for use of its product as a primary
screening system to replace or work  in conjunction with conventional Pap  smear
screening  or  if  automated  analysis systems  are  developed  and  receive FDA
clearance or approval,  the use  of conventional  Pap smear  screening could  be
substantially  affected  and  the Company's  business,  financial  condition and
results of operations could be materially adversely affected.
    
 
    The  market  for   the  Company's  current   and,  if  developed,   proposed
microbiology  products  is highly  competitive,  and the  Company  competes with
numerous well-established foreign and domestic companies, most of which  possess
substantially  greater  financial,  technical,  marketing,  personnel  and other
resources than the Company and have  established reputations for success in  the
development,  sale and  service of manual  and/or automated  IN VITRO diagnostic
testing products. A  significant portion of  the MIC/ ID  testing market in  the
United  States is controlled  by two companies,  MicroScan, Inc., a wholly-owned
subsidiary of Dade  International, Inc. ("MicroScan"),  and bioMerieux Vitek,  a
division   of  bioMerieux,   a  French   company  ("bioMerieux   Vitek").  Difco
Laboratories, Inc. ("Difco") has been  issued a U.S. patent covering  technology
related  to the alamarBlue  technology covered in one  of the Company's patents.
There can be no assurance that Difco, which has substantially greater  resources
and  experience in research,  development, manufacturing and  marketing than the
Company, will not  use its  patented technology  to develop  products that  will
compete directly with the Company's microbiology products.
 
    The   medical  diagnostics  industry  is   characterized  by  rapid  product
development and technological  advances. There  can be no  assurance that  other
technologies  or products that are functionally  similar to those of the Company
are not currently available or under  development, or that other companies  with
expertise  and resources  that would  encourage them  to attempt  to develop and
market competitive
 
                                       8
<PAGE>
   
products will not develop new products that compete directly with the  Company's
products.  The Company's products could be  rendered obsolete or uneconomical by
the introduction  and market  acceptance  of competing  products,  technological
advances  of  the  Company's  current  or  potential  competitors,  or  by other
approaches. There can be no assurance that  the Company will be able to  compete
successfully   against  current  or  future  competitors  or  that  competition,
including the development and commercialization of new products and  technology,
will  not have  a material adverse  effect on the  Company's business, financial
condition and results of operations. See "Business -- Competition."
    
 
   
    GOVERNMENT REGULATION.  The  Company's products and manufacturing  processes
are regulated by state and federal authorities, including the FDA and comparable
authorities  in certain states  and other countries. Failure  to comply with the
FD&C Act  and applicable  regulatory  requirements can  result in,  among  other
things,  civil  and  criminal  fines,  product  recalls,  detentions,  seizures,
injunctions and criminal prosecutions.
    
 
   
    United States regulatory requirements promulgated under the FD&C Act provide
that many of the  Company's products may not  be shipped in interstate  commerce
without  prior  authorization from  the FDA.  Such authorization  is based  on a
review by the FDA of a product's safety and effectiveness for its intended uses.
Medical devices may be authorized by the FDA for marketing either pursuant to  a
pre-market  notification  under  Section  510(k)  of  the  FD&C  Act  (a "510(k)
Notification") or a PMA under the FD&C Act. The process of obtaining  clearances
or  approvals from  the FDA and  other applicable regulatory  authorities can be
expensive, uncertain and time consuming, frequently requiring several years from
the commencement of  clinical trials  or submission of  data to  the receipt  of
regulatory approval.
    
 
   
    A  510(k) Notification,  among other things,  requires an  applicant to show
that its  products  are  "substantially  equivalent"  in  terms  of  safety  and
effectiveness  to existing products that are currently permitted to be marketed.
An applicant  is permitted  to begin  marketing a  product as  to which  it  has
submitted a 510(k) Notification at such time as the FDA issues a written finding
of  substantial equivalence. Requests  for additional information  may delay the
market introduction  of certain  of an  applicant's products  and, in  practice,
initial clearance of products often takes substantially longer than the FDA pre-
market notification review period of 90 days.
    
 
   
    A  PMA consists of  the submission to  the FDA of  information sufficient to
establish independently that  a device is  safe and effective  for its  intended
use.  A  PMA must  be  supported by  extensive  data, including  preclinical and
clinical trial data,  as well as  extensive literature to  prove the safety  and
effectiveness of the device. By statute, the FDA is required to respond to a PMA
within  180 days from the date of  its submission; however, the approval process
usually takes substantially longer, often as  long as several years. During  the
review   period,  the  FDA  may  conduct  extensive  reviews  of  the  Company's
facilities,  deliver   multiple   requests  for   additional   information   and
clarifications and convene advisory panels to assist in its determination.
    
 
    FDA   clearances  and   approvals,  if  granted,   may  include  significant
limitations on  the intended  uses for  which  a product  may be  marketed.  FDA
enforcement policy strictly prohibits the promotion of
cleared  or approved  medical devices for  non-approved or  "off-label" uses. In
addition, product clearances or approvals may be withdrawn for failure to comply
with regulatory standards  or the  occurrence of  unforeseen problems  following
initial marketing.
 
   
    Under  current interpretation  of FDA  regulations, marketing  of the AcCell
Series 2000 in  the United States  does not require  FDA clearance or  approval.
Marketing  of  the TracCell  2000 in  the United  States, however,  will require
pre-marketing clearance or  approval by  the FDA. The  Company anticipates  that
such  clearance  will  be sought  through  submission  to the  FDA  of  a 510(k)
Notification rather than a PMA. The Company is currently conducting the required
testing of the TracCell  2000 and expects to  submit a 510(k) Notification  with
respect  to the TracCell 2000 by the end of 1996. There can be no assurance that
the Company will successfully complete the necessary testing on a timely  basis,
if  ever, that a 510(k)  Notification with respect to  the TracCell 2000 will be
submitted to the FDA by the end of 1996, if ever, or that the FDA will clear the
TracCell 2000 for marketing in the United States on a timely basis, if ever.  It
is
    
 
                                       9
<PAGE>
   
also  possible that  the FDA could  require a  PMA for the  TracCell 2000, which
would result in  significant delays in  bringing the TracCell  2000 to the  U.S.
market  and  could have  a material  adverse effect  on the  Company's business,
financial condition and results of operations.
    
 
   
    Under current interpretation of FDA regulations, marketing of the  Company's
MIC/ID microbiology products in the United States requires FDA clearance through
the  510(k) Notification process.  With respect to  the Company's MIC/ID testing
products, 510(k) Notifications must  be filed and cleared  with respect to  each
antibiotic   used.  The  Company  may  submit  applications  to  add  individual
antibiotics to those previously cleared  as the market warrants. However,  there
can  be  no assurance  that  clearances will  continue  to be  obtained  or that
obtained clearances will not be withdrawn.
    
 
   
    At the current time,  alamarBlue is marketed for  use in the industrial  and
research  markets and therefore does not  require FDA clearance or approval. The
FDA could change  its interpretation  of the  regulations and  require a  510(k)
Notification or PMA submission which, if pursued, may not be cleared or approved
or,  if approved, may  contain significant limitations on  the intended uses for
which the product is marketed.
    
 
   
    Marketing in the United States  of the Company's products under  development
may  require additional FDA clearances or  approvals. For example, the Company's
proposed automated  pre-screening  specimen mapping  workstation,  the  TracCell
3000,  if developed, may not  be sold in the United  States unless and until the
Company has  obtained  FDA  clearance  or  approval,  either  through  a  510(k)
Notification  or  a PMA.  In addition,  marketing of  the Company's  proposed KB
Reader and  other proposed  microbiology products,  if developed,  is likely  to
require  FDA clearance  through 510(k)  Notifications. The  Company is currently
conducting research and development  with respect to such  products and has  not
yet begun clinical trials. There can be no assurance that any such products will
be  developed or, if developed,  that such products will  be cleared or approved
for marketing by the FDA or other applicable regulatory authorities or, if  such
clearance  or approval is received, that it will not be withdrawn. See "Business
- -- Cytopathology -- Cytopathology Products" and "-- Microbiology -- Microbiology
Products."
    
 
   
    Sales of medical devices  outside the United States  are subject to  foreign
regulatory  requirements that vary from country to country. The time required to
obtain approval by a foreign country may be longer or shorter than that required
for FDA clearance or approval, and the requirements may differ. Export sales  of
certain  devices  that have  not received  FDA  marketing clearance  or approval
generally are subject to both FDA export permit requirements and, in some cases,
general U.S. export  regulations. In order  to obtain a  FDA export permit,  the
Company  may be required to provide the  FDA with documentation from the medical
device regulatory authority of the country in which the purchaser is located. No
assurance can be given  that foreign regulatory approvals  will be granted on  a
timely  basis,  if ever,  or  that the  Company will  not  be required  to incur
significant costs in obtaining or maintaining its foreign regulatory approvals.
    
 
   
    The  Company   intends  to   seek   qualification  for   its   international
manufacturing  operations under the International Standards Organization ("ISO")
9001 Series of Standards, and to seek  the "CE" mark for the AcCell Series  2000
and  proposed products. The CE mark is  recognized by countries that are members
of the European Union and the European Free Trade Association and, effective  in
1998, will be required to be affixed to all medical devices sold in the European
Union.  The AcCell Series 2000 is expected  to be certified as complying with CE
mark requirements upon completion of the CE mark qualification process which  is
underway; however, no assurance can be given that the Company will obtain the CE
mark  for the AcCell  Series 2000 or  any proposed products  or satisfy ISO 9001
standards, or that  any product that  the Company may  develop or  commercialize
will  obtain the CE mark or will  obtain any other required regulatory clearance
or approval on a timely basis, if ever.
    
 
   
    The Company  is  subject to  certain  FDA registration,  record-keeping  and
reporting  requirements, and most of  the Company's manufacturing facilities are
obligated to follow FDA Good Manufacturing
    
 
                                       10
<PAGE>
   
Practice ("GMP") regulations  and are  subject to periodic  FDA inspection.  Any
failure  to comply  with GMP  regulations or any  other FDA  or other government
regulations could  have a  material adverse  effect on  the Company's  business,
financial condition and results of operations.
    
 
   
    In  July 1996, the Company received from  the FDA a warning letter regarding
certain procedures used in connection  with the manufacture of its  microbiology
products  at the Sensititre facility in the  United Kingdom. In such letter, the
FDA stated that the Company manufactured  sterile products at such facility  and
was  not  in compliance  with  GMP regulations  relating  to the  manufacture of
sterile products. On August 7, 1996, the Company submitted a written response to
the FDA asserting that the products manufactured at the Sensititre facility  are
not sterile. There can be no assurance, however, that the Company will not incur
material  costs to comply with FDA regulations,  that the FDA will not institute
proceedings against  the Company  or  that such  proceedings  would not  have  a
material  adverse  effect on  the  Company's business,  financial  condition and
results of operations.
    
 
   
    Federal, state and foreign regulations regarding the manufacture and sale of
healthcare products and  diagnostic devices  are subject to  future change.  The
Company  cannot predict what material impact, if any, such changes might have on
its business. Future changes in regulations or enforcement policies could impose
more  stringent  requirements  on  the  Company,  compliance  with  which  could
adversely  affect  the  Company's  business.  Such  changes  may  relax  certain
requirements, which could prove beneficial to the Company's competitors and thus
adversely affect the Company's  business. In addition,  regulations of the  FDA,
including  GMP regulations, and  state and foreign  laws and regulations, depend
heavily on administrative interpretations,  and there can  be no assurance  that
future  interpretations made by  the FDA, or  other regulatory authorities, with
possible retroactive  effect, will  not adversely  affect the  Company. See  "--
Technological Change and Competition."
    
 
    In  addition to the  regulations directly pertaining to  the Company and its
products, many of the Company's existing and potential customers are subject  to
extensive  regulation  and  governmental oversight.  Regulatory  changes  in the
healthcare  industry  that  adversely  affect  the  business  of  the  Company's
customers  could  have  a material  adverse  effect on  the  Company's business,
financial condition  and  results of  operations.  See "Business  --  Government
Regulation."
 
   
    There  can be no assurance that the Company will be able to obtain necessary
regulatory approvals or clearances in the United States or internationally on  a
timely  basis, if ever.  Delays in the  receipt of, or  failure to receive, such
approvals  or  clearances,  the  loss   of  previously  received  approvals   or
clearances, or failure to comply with existing or future regulatory requirements
would  have  a  material adverse  effect  on the  Company's  business, financial
condition and results of operations.
    
 
    DEPENDENCE ON KEY  EMPLOYEES.  The  Company believes that  its success  will
depend  to a significant extent upon the  efforts and abilities of a small group
of executive, scientific and marketing personnel, and in particular on Peter  P.
Gombrich,  the  Company's Chairman  of the  Board,  Chief Executive  Officer and
President. The loss of the services of one or more of these key personnel  could
have  a material adverse  effect on the  Company's business, financial condition
and results of operations. In addition, the Company's future success will depend
upon its ability  to continue  to attract  and retain  qualified scientific  and
management personnel who are in great demand. There can be no assurance that the
Company will be successful in attracting and retaining such personnel.
 
   
    PROTECTION OF INTELLECTUAL PROPERTY.  The Company relies on a combination of
patents,   licensing  arrangements,  trade  names,  trademarks,  trade  secrets,
know-how and proprietary technology and policies and procedures for  maintaining
the  secrecy of trade  secrets, know-how and proprietary  technology in order to
secure and protect its  intellectual property rights. The  Company has filed  or
been  assigned eight  U.S. patent applications  covering certain  aspects of its
cytopathology products, and four U.S.  patent applications, one Japanese  patent
application  and  one Canadian  patent application  related to  its microbiology
products. The Company holds certain licenses on several U.S. and foreign patents
and other  intellectual  property rights  regarding  aspects of  the  technology
embodied in the Sensititre product
    
 
                                       11
<PAGE>
line  and is  the licensee  of certain  automated cell  analysis technology. The
Company holds a  U.S. patent  and has  received a notice  of intent  to grant  a
related European patent with respect to a portion of the alamarBlue microbiology
technology.
 
    None of the Company's patent applications has been granted as of the date of
this  Prospectus, and there can be no assurance that any such patent application
will result in an issued patent. The Company may, in the future, file additional
patent applications; however, there can be no assurance that the Company will be
successful in obtaining approval of any future patent applications it files with
respect to  its technologies.  In  addition, since  patent applications  in  the
United  States  are  maintained  in  secrecy  until  patents  issue,  and  since
publications of discoveries in the scientific  or patent literature tend to  lag
behind  actual discoveries by several months, the Company cannot be certain that
the Company or other relevant patent application filer was the first creator  of
inventions  covered by pending patent applications or that such persons were the
first to file patent applications for such inventions.
 
   
    There also can  be no assurance  that any patents,  patent applications  and
patent  licenses will  adequately cover  the Company's  technologies. Protection
relating to portions of such technologies  may be challenged or circumvented  by
competitors,  and other portions may be in the public domain or protectable only
under state trade secret laws.
    
 
   
    The  Company  owns  two  U.S.  trademark  registrations  for  the  trademark
"Sensititre,"  has filed a U.S. trademark application for the trademark "AcCell"
and is currently  preparing three  more trademark applications  for filing.  The
Company  may  file additional  U.S. and  foreign  trademark applications  in the
future. However,  no  trademark  registrations  have yet  been  granted  to  the
Company,  and there  can be  no assurance  that any  such registrations  will be
granted. In addition, there can be no  assurance that third parties have not  or
will  not adopt or register marks that  are the same or substantially similar to
those of the Company,  or that such  third parties will not  be entitled to  use
such  marks to the exclusion of the Company. Selecting new trademarks to resolve
such situations could involve significant costs, including the loss of  goodwill
already gained by the marks previously used.
    
 
   
    The  Company  relies  for  protection of  its  trade  secrets,  know-how and
proprietary technology on nondisclosure and confidentiality agreements with  its
employees, consultants, distributors, suppliers, researchers and advisors. There
can  be no assurance that such agreements will provide meaningful protection for
the Company's trade secrets, know-how or proprietary technology in the event  of
any  unauthorized use or disclosure of such information. In addition, others may
obtain access to, or independently develop, technologies or know-how similar  to
that of the Company.
    
 
   
    There  can be no assurance that  the Company's patents, patent applications,
patent licenses, trademarks and trade secret protections will adequately protect
the Company from  potential infringement or  misappropriation by third  parties.
Historically,  the Company has  been required to  undertake costly litigation to
enforce its intellectual property rights. Although the Company is not  currently
aware  of any  potential infringement, future  litigation by the  Company may be
necessary to enforce its patent rights, as well as to protect its trade secrets,
know-how and proprietary technology, or to  determine the scope and validity  of
the   proprietary  rights  of  others.  Any  such  litigation  could  result  in
substantial cost to and diversion of effort by the Company.
    
 
   
    The Company's success will also depend on its ability to avoid  infringement
of  patent or other proprietary rights of  others. The Company is not aware that
it is  infringing  any  such rights  of  a  third  party, nor  is  it  aware  of
proprietary  rights of others for which it  will be required to obtain a license
in order to develop its  products. However, there can  be no assurance that  the
Company  is not infringing the proprietary rights of others, or that the Company
will not be required to defend itself against claimed infringement of the rights
of others.  Adverse determinations  in  any such  litigation could  subject  the
Company  to significant liability to third parties, could require the Company to
seek  licenses  from  third   parties  and  could   prevent  the  Company   from
manufacturing,  selling or using certain of its products or technologies, any of
which could have a material adverse effect on the Company.
    
 
                                       12
<PAGE>
   
    POTENTIAL FLUCTUATIONS IN  FUTURE QUARTERLY  RESULTS.   The Company  expects
that  its operating results will fluctuate significantly from quarter to quarter
in the future and will depend on various factors, many of which are outside  the
Company's control. These factors include the success of the marketing efforts of
the  Company and  its distribution  partners, the  likelihood, timing  and costs
associated with  obtaining necessary  regulatory  clearances or  approvals,  the
timing  and  level  of  expenditures  associated  with  expansion  of  sales and
marketing activities  and  overall operations,  the  Company's ability  to  cost
effectively  expand manufacturing capacity  and maintain consistently acceptable
yields, the timing of establishment  of strategic distribution arrangements  and
the  success of  the activities  conducted under  such arrangements,  changes in
demand for the Company's products, order cancellations, competition, changes  in
government  regulation and other factors, the  timing of significant orders from
and shipments to customers, and  general economic conditions. These factors  are
difficult  to forecast, and these or other factors could have a material adverse
effect on the Company's business, financial condition and results of operations.
    
 
    Fluctuations in  quarterly  demand for  products  may adversely  affect  the
continuity  of the  Company's manufacturing operations,  increase uncertainty in
operational planning,  disrupt  cash  flow  from  operations  and  increase  the
volatility of the Company's stock price. The Company's expenditures are based in
part  on the Company's expectations  as to future revenue  levels and to a large
extent are fixed in the  short term. If revenues  do not meet expectations,  the
Company's  business,  financial condition  and  results of  operations  could be
materially adversely  affected.  The  Company believes  that  period  to  period
comparisons  of its operating results are  not necessarily meaningful and should
not be relied  upon as indications  of future  performance. As a  result of  the
foregoing  factors,  it is  likely  that in  some  future quarter  the Company's
revenue or operating  results will be  below the expectations  of public  market
analysts  and investors. In such event, the  price of the Company's Common Stock
could be materially adversely affected.
 
   
    Additionally, if specified  earnings per  share or  stock price  performance
thresholds  are met during 1997, contingencies will be satisfied with respect to
940,955 shares of Common Stock and warrants to purchase 63,472 shares of  Common
Stock  issued in  connection with  the Merger  and an  amount equal  to the fair
market value of  such securities  at the date  on which  such contingencies  are
satisfied  is expected to be recorded as  goodwill and amortized over ten years.
Under the terms  of the  Agreement and Plan  of Reorganization  relating to  the
Merger (the "Merger Agreement"), such contingencies will be satisfied if, during
1997,  (i) earnings, on a fully diluted  basis, exceed $0.03 per share of Common
Stock or (ii) the fair market value of the Common Stock equals or exceeds  $2.50
per  share for a period of 45 consecutive trading days. Furthermore, the Company
has entered into definitive agreements  to acquire a two-thirds equity  interest
in  Oncometrics for approximately $4.0 million in  cash. It is expected that the
allocation of  the purchase  price payable  in connection  with the  Oncometrics
Acquisition  will  include  approximately $1.6  million  of  acquired in-process
research and development and approximately $1.1 million of purchased technology.
The purchased technology is  expected to be amortized  over the expected  useful
life  of  such  technology, currently  anticipated  to  be ten  years,  with the
acquired  in-process  research  and   development  expensed  in  the   Company's
consolidated  statement of operations as a non-cash charge against operations in
the period  of acquisition.  The  Company has  also  entered into  a  definitive
agreement  to acquire the remaining outstanding  shares of Common Stock of RADCO
and retire approximately  $1.2 million  in aggregate principal  amount of  RADCO
Notes at an aggregate cost to the Company of approximately $1.4 million in cash.
Approximately  $630,000 of  the purchase  price payable  in connection  with the
RADCO Acquisition is expected  to be allocated  to acquired in-process  research
and  development and  charged against  operations in  the Company's consolidated
statement of operations  in the period  of acquisition. To  the extent that  the
accounting  treatments described above change, the Company's reported results of
operations may be adversely affected. In addition, if the Company determines  in
accordance  with  its existing  accounting policy  that the  undiscounted future
operating cash  flows  from  its  operations are  insufficient  to  support  the
aggregate  amount of its  unamortized goodwill, the Company  will be required to
reflect an impairment  charge in  the amount of  unrecoverable goodwill  against
then  current earnings. See  "Management's Discussion and  Analysis of Financial
Condition and Results of Operations" and Pro Forma Condensed Combining Financial
Statements.
    
 
                                       13
<PAGE>
   
    SIGNIFICANT CAPITAL REQUIREMENTS;  DEPENDENCE ON PROCEEDS  OF THE  OFFERING;
POSSIBLE NEED FOR ADDITIONAL CAPITAL.  The Company intends to expend substantial
funds   for  research   and  product  development,   scale-up  of  cytopathology
manufacturing capacity, reduction  of accounts  payable, possible  acquisitions,
and  other working capital and general  corporate purposes. Although the Company
believes that the net proceeds of the Offering, together with interest  thereon,
existing  cash balances  and internally  generated funds  will be  sufficient to
finance the  Company's projected  operations through  at least  the next  twelve
months, there can be no assurance to that effect. The Company's future liquidity
and  capital requirements will depend upon numerous factors, including the costs
and timing of expansion of manufacturing capacity, the costs, timing and success
of the Company's product development efforts, the costs and timing of  potential
acquisitions,  the extent to which the  Company's existing and new products gain
market acceptance, competing technological and market developments, the progress
of commercialization  efforts by  the Company  and its  distributors, the  costs
involved in preparing, filing, prosecuting, maintaining, enforcing and defending
patent  claims and other  intellectual property rights,  developments related to
regulatory  and  third  party  reimbursement  matters,  including  the  Clinical
Laboratory  Improvement  Amendments  of  1988 ("CLIA"),  and  other  factors. If
additional financing is needed, the Company  may seek to raise additional  funds
through  public  or  private financings,  collaborative  relationships  or other
arrangements. The Company currently has  no commitments with respect to  sources
of  additional financing, and there can be  no assurance that any such financing
sources, if needed, would be available to the Company or that adequate funds for
the  Company's  operations,  whether  from  the  Company's  revenues,  financial
markets,  collaborative or  other arrangements  with corporate  partners or from
other sources, will  be available when  needed or on  terms satisfactory to  the
Company.  The failure of the Company to obtain adequate additional financing may
require the Company to delay, curtail or scale back some or all of its  research
and development programs, sales and marketing efforts, manufacturing operations,
clinical  studies  and  regulatory  activities and,  potentially,  to  cease its
operations. Any additional equity financing may involve substantial dilution  to
the Company's then-existing stockholders. See "Use of Proceeds."
    
 
   
    NEED TO MANAGE EXPANDING OPERATIONS.  The Company will be required to expand
its   operations,  particularly  in  the  areas   of  sales  and  marketing  and
manufacturing.  Such  expansion  will  likely   result  in  new  and   increased
responsibilities  for management personnel and place significant strain upon the
Company's  management,  operating  and  financial  systems  and  resources.   To
accommodate any such growth and compete effectively, the Company may be required
to  implement and/or improve  its information systems,  procedures and controls,
and to expand, train, motivate and  manage its work force. The Company's  future
success  will depend to a  significant extent on the  ability of its current and
future management personnel to operate effectively, both independently and as  a
group.  There  can  be  no  assurance  that  the  Company's  personnel, systems,
procedures and  controls  will  be  adequate to  support  the  Company's  future
operations.  Any  failure to  implement and  improve the  Company's operational,
financial and  management  systems  or  to expand,  train,  motivate  or  manage
employees  as required by future  growth, if any, could  have a material adverse
effect on the Company's business, financial condition and results of operations.
    
 
   
    RISK OF LITIGATION;  RISK OF  PRODUCT RECALLS;  POTENTIAL UNAVAILABILITY  OF
INSURANCE.   Commercial screening  of Pap smear tests  has been characterized by
significant malpractice  litigation. The  Company faces  a risk  of exposure  to
product liability, errors and omissions or other claims if the use of its AcCell
Series  2000 or any  future potential products, including  the TracCell 2000, is
alleged to have contributed to or resulted in a false negative diagnosis.  While
neither  the AcCell Series 2000 nor the  TracCell 2000 is purported to offer any
clinical diagnosis,  there can  be  no assurance  that  the Company  will  avoid
significant  litigation. The Company also faces  the possibility that defects in
designs or manufacture of its products could result in product recall.
    
 
   
    The  Company  currently  maintains  a  product  liability  insurance  policy
providing maximum coverage of $10.0 million and per occurrence coverage of $10.0
million.  The  medical device  industry  in general  has  experienced increasing
difficulty in obtaining and  maintaining reasonable product liability  coverage,
    
 
                                       14
<PAGE>
and substantial increases in insurance premium costs in many cases have rendered
coverage  economically impractical. There can be no assurance that the Company's
existing product  liability  insurance  will  be  adequate  or  continue  to  be
available,  or that additional product liability  insurance will be available to
the Company  when needed  or at  a  reasonable cost.  An inability  to  maintain
insurance  at acceptable  costs or  otherwise protect  against potential product
liability could  prevent  or  inhibit the  continued  commercialization  of  the
Company's products. In addition, a product liability claim in excess of relevant
insurance  coverage or a product recall could  have a material adverse effect on
the Company's business, financial condition and results of operations.
 
    ENVIRONMENTAL REGULATION.   The Company is  subject to a  variety of  local,
state,  federal  and foreign  government  regulations relating  to  the storage,
discharge, handling, emission,  generation, manufacture and  disposal of  toxic,
infectious  and  other hazardous  substances used  to manufacture  the Company's
products. The failure to comply with current or future regulations could  result
in  the  imposition  of substantial  fines  against the  Company,  suspension of
production,  alteration  of   its  manufacturing  processes   or  cessation   of
operations.  There can be no assurance that  the Company will not be required to
incur significant costs  to comply  with any such  laws and  regulations in  the
future, or that such laws or regulations will not have a material adverse effect
on  the Company's business,  financial condition and  results of operations. Any
failure by the Company to control the  use, disposal, removal or storage of,  or
to  adequately restrict the discharge of, or assist in the cleanup of, hazardous
chemicals or hazardous, infectious or toxic substances could subject the Company
to significant liabilities, including joint and several liability under  certain
statutes.  The  imposition of  such liabilities  could  have a  material adverse
effect on the Company's business, financial condition and results of operations.
 
    UNCERTAINTY OF PROFITABLE CYTOPATHOLOGY MANUFACTURING.  The Company has only
recently developed the AcCell Series 2000 and marketing and sales of the  AcCell
Series  2000 have only recently begun.  The Company is also currently developing
the manufacturing processes  for the TracCell  2000. There can  be no  assurance
that  the Company will be able to  sell sufficient numbers of systems or develop
volume manufacturing processes that will lead to the cost-effective  manufacture
of  the AcCell  Series 2000  or the  TracCell 2000.  The Company  also faces the
possibility that defects in designs or manufacture of its products could  result
in product recall. See "Business -- Manufacturing."
 
   
    DEPENDENCE  ON SUPPLIERS.  Certain key  components and raw materials used in
the manufacturing of the Company's  products are currently obtained from  single
vendors.  Although  the  Company  believes  that  alternative  sources  for such
components and  raw  materials  are  available, any  supply  interruption  in  a
single-sourced component or raw material would have a material adverse effect on
the  Company's ability to manufacture products until a new source of supply were
qualified. There can  be no assurance  that the Company  would be successful  in
qualifying additional sources on a timely basis, if ever. Failure to do so would
have  a material adverse  effect on the  Company's business, financial condition
and results of operations. In addition, an uncorrected impurity or a  supplier's
variation  in a raw material, either unknown to the Company or incompatible with
the Company's manufacturing process, could have a material adverse effect on the
Company's ability  to manufacture  certain  of its  products. See  "Business  --
Manufacturing."
    
 
   
    IMPACT  OF MEDICARE, MEDICAID  AND OTHER THIRD PARTY  REIMBURSEMENT.  In the
United States, some Pap smear screenings and MIC/ID tests are currently paid for
by the patient directly,  and the level of  reimbursement by third party  payors
that   do  provide   reimbursement  varies  considerably.   Third  party  payors
(Medicare/Medicaid, private health insurance, health administration  authorities
in  foreign countries and other organizations) may affect the demand, pricing or
relative attractiveness of the Company's products and services by regulating the
frequency and maximum amount of reimbursement for Pap smear screening and MIC/ID
testing provided by such  payors or by not  providing any reimbursement at  all.
Restrictions  on reimbursement  for Pap smear  screening and  MIC/ID testing may
limit the price  that the  Company can  charge for  its products  or reduce  the
demand for them. In addition, if the level of reimbursement provided by Medicare
and Medicaid is significantly below the amount laboratories and hospitals charge
patients  to perform Pap  smear screening and  MIC/ID testing, respectively, the
size of the
    
 
                                       15
<PAGE>
   
potential market  available to  the Company  may  be reduced.  There can  be  no
assurance  that the  level of reimbursement  for Pap smear  screening and MIC/ID
testing will  achieve, or  be  maintained at,  levels  necessary to  permit  the
Company to generate substantial revenues or be profitable.
    
 
    In  the international market,  reimbursement by private  third party medical
insurance providers, including governmental insurers and providers, varies  from
country  to  country. In  certain countries,  the  Company's ability  to achieve
significant market penetration may depend  upon the availability of third  party
or governmental reimbursement.
 
   
    UNCERTAINTY AND POSSIBLE NEGATIVE EFFECTS OF HEALTH CARE REFORM.  The health
care  industry  is  undergoing  fundamental  changes  that  are  the  result  of
political,  economic   and  regulatory   influences.  In   the  United   States,
comprehensive programs have been proposed that seek to control the escalation of
health care expenditures within the economy. Reforms that have been, and may be,
considered  include controls on health care  spending through limitations on the
increase  in  private  health  insurance  premiums  and  Medicare  and  Medicaid
spending,   the  creation  of  large   insurance  purchasing  groups  and  other
fundamental changes  to the  health  care delivery  system. Health  care  reform
could,  for example, result in  a reduction in the  recommended frequency of Pap
smear screening or limitations  on reimbursement which  would likely reduce  the
demand for the Company's cytopathology products. Demand for the Company's MIC/ID
products  could be similarly affected. The Company anticipates that Congress and
state legislatures will continue to review and assess cost containment measures,
alternative health care delivery systems and methods of payment, and that public
debate of these issues will likely continue. Due to uncertainties regarding  the
outcome   of   health  care   reform   initiatives  and   their   enactment  and
implementation, the  Company cannot  predict what  reforms will  be proposed  or
adopted  or the  effect that such  proposals or  their adoption may  have on the
Company. There can be no assurance that future health care legislation or  other
changes  in the  administration or interpretation  of government  health care or
third party reimbursement programs  will not have a  material adverse effect  on
the Company's business, financial condition and results of operations.
    
 
   
    INTERNATIONAL  SALES AND OPERATIONS  RISKS.  The  Company sells microbiology
products and  intends to  sell  its cytopathology  and  any future  products  to
customers   both  domestically  and  internationally.  International  sales  and
operations may be limited or disrupted by the imposition of government controls,
export license requirements, political instability, trade restrictions,  changes
in  tariffs or difficulties  in staffing and  managing international operations.
Foreign regulatory authorities often establish product standards different  from
those  in  the United  States  and any  inability  to obtain  foreign regulatory
approvals on  a  timely  basis could  have  a  material adverse  effect  on  the
Company's   international  business  operations.   Additionally,  the  Company's
business, financial  condition  and  results  of  operations  may  be  adversely
affected  by  increases in  duty rates  and  difficulties in  obtaining required
licenses and permits. There can be no assurance that the Company will be able to
successfully commercialize its products, or any future products, in any  foreign
market.
    
 
    POSSIBLE  VOLATILITY OF STOCK PRICE.  The  market price of the shares of the
Company's Common Stock,  like that  of the common  stock of  many other  medical
products  and high technology companies, has in  the past been, and is likely in
the future to continue to be,  highly volatile. Factors such as fluctuations  in
the  Company's operating results, announcements  of technological innovations or
new commercial products  by the Company  or competitors, government  regulation,
changes  in  the current  structure  of the  health  care financing  and payment
systems, developments  in  or disputes  regarding  patent or  other  proprietary
rights,  economic and other  external factors and  general market conditions may
have a significant effect on the market price of the Common Stock. Moreover, the
stock market  has  from  time  to time  experienced  extreme  price  and  volume
fluctuations  which  have particularly  affected the  market prices  for medical
products and high technology  companies and which have  often been unrelated  to
the operating performance of such companies. These broad market fluctuations, as
well  as general economic, political and market conditions, may adversely affect
the market price of the Company's  Common Stock. In the past, following  periods
of  volatility in the market price of a company's common stock, securities class
action litigations have occurred  against the issuing company.  There can be  no
assurance  that such litigation will not occur in the future with respect to the
Company. Such litigation could result
 
                                       16
<PAGE>
in substantial  costs and  diversion of  management's attention  and  resources,
which  could have a material adverse effect on the Company's business, financial
condition  and  results  of  operations.  Any  adverse  determination  in   such
litigation could also subject the Company to significant liabilities.
 
    LACK  OF DIVIDENDS.  The  Company has never paid  cash or other dividends on
its Common Stock and does not anticipate paying any cash dividends on its Common
Stock in the foreseeable future. See "Dividend Policy."
 
   
    AUTHORIZATION  AND   POTENTIAL  ISSUANCE   OF  PREFERRED   STOCK;   DELAWARE
ANTI-TAKEOVER  LAW.  The  Company's Certificate of  Incorporation authorizes the
issuance of Preferred Stock  with such designations,  rights and preferences  as
may  be determined from time to time by the Board of Directors. Accordingly, the
Board  of  Directors  is  empowered,  without  stockholder  approval,  to  issue
Preferred  Stock with dividend, liquidation,  conversion, voting or other rights
which could adversely affect the voting power or other rights of the holders  of
the  Company's Common Stock.  Although the Company does  not currently intend to
issue any shares of its Preferred Stock,  in the event of issuance, such  shares
could  be utilized,  under certain circumstances,  as a  method of discouraging,
delaying or preventing  a change  in control  of the  Company. There  can be  no
assurance  that the Company will not,  under certain circumstances, issue shares
of its Preferred Stock. Furthermore, the  Company may in the future adopt  other
measures  that may have the effect of delaying, deferring or preventing a change
in control of the Company. Certain of  such measures may be adopted without  any
further  vote or action by the stockholders, although the Company has no present
plans to adopt any such measures.  The Company is also afforded the  protections
of  Section 203 of  the Delaware General  Corporation Law, which  could delay or
prevent a change in  control of the Company,  impede a merger, consolidation  or
other  business  combination involving  the  Company or  discourage  a potential
acquiror from making a tender offer or otherwise attempting to obtain control of
the Company.  See "Description  of Capital  Stock --  Preferred Stock"  and  "--
Delaware Anti-Takeover Law; Certain Charter Provisions."
    
 
    IMMEDIATE    AND    SUBSTANTIAL   DILUTION;    OUTSTANDING    WARRANTS   AND
OPTIONS.  Because the offering price will be substantially higher than the  book
value per share of the Common Stock, purchasers of shares of Common Stock in the
Offering  will incur immediate and  substantial dilution. In addition, investors
purchasing shares in the Offering will  incur additional dilution to the  extent
outstanding stock options and warrants are exercised. See "Dilution."
 
   
    SHARES  ELIGIBLE FOR  FUTURE SALE.   Sales of substantial  amounts of Common
Stock in the public market after the Offering, or the possibility of such  sales
occurring,  could adversely affect prevailing market prices for the Common Stock
or the future ability  of the Company  to raise capital  through an offering  of
equity  securities.  Upon  completion of  the  Offering, the  Company  will have
outstanding 22,279,988 shares  of Common Stock,  warrants to purchase  5,917,605
shares  of Common Stock and options to purchase 1,602,971 shares of Common Stock
(based on shares,  warrants and options  outstanding as of  August 27, 1996  and
assuming no exercise of the Underwriters' over-allotment option). In addition to
the  4,750,000 shares  of Common  Stock to  be sold  in the  Offering, 8,621,585
shares have been sold or are available  for immediate sale in the public  market
pursuant  to effective  registration statements or  exemptions from registration
under the Securities Act of 1933, as amended (the "Securities Act"), subject  in
the case of certain holders to the limitations applicable to affiliates pursuant
to  Rule 144 under the Securities Act.  An additional 1,733,875 shares of Common
Stock that were issued in connection  with the Merger will become available  for
immediate  sale in  the public market  on June  30, 1997 upon  the expiration of
certain restrictions  placed  on  such  shares in  connection  with  the  Merger
(including  380,649  of  such  shares  currently  subject  to  forfeiture).  The
directors and certain  executive officers  and securityholders  of the  Company,
including  the Selling Stockholders, who hold  in the aggregate 7,174,528 of the
remaining outstanding shares have entered into "lock-up" agreements with  Vector
Securities   International,   Inc.   and   Tucker   Anthony   Incorporated,   as
representatives of the Underwriters (the "Representatives"). In accordance  with
such  lock-up agreements, an aggregate of  1,311,420 shares of Common Stock will
become available for  immediate sale  in the  public market  commencing 91  days
after  the date of  this Prospectus, 1,311,414 shares  will become available for
immediate sale in the public market commencing  181 days after the date of  this
Prospectus  and  4,551,694 shares  (including 560,306  of such  shares currently
    
 
                                       17
<PAGE>
   
subject to forfeiture) will  become available for immediate  sale in the  public
market  commencing 271 days  after the date  of this Prospectus,  subject in the
case of certain holders to the limitations applicable to affiliates pursuant  to
Rule  144, and,  with respect  to 116,000  shares, release  from escrow.  Of the
outstanding warrants, 480,402 shares  underlying outstanding warrants are  being
sold  in the  Offering. Holders  of approximately  1,387,500 of  the outstanding
warrants  have  entered  into   lock-up  agreements  with  the   Representatives
restricting the sale of shares underlying such warrants in the public market for
a  period of 60 days from the date  of this Prospectus. Holders of an additional
2,120,406 of  the  outstanding warrants  have  entered into  lock-up  agreements
restricting  the sale of  such warrants and the  shares underlying such warrants
for a period of 90 days with respect to 706,802 warrants, 180 days with  respect
to  706,802  warrants and  270 days  with  respect to  706,802 warrants.  Of the
outstanding options,  109,395 shares  underlying outstanding  options are  being
sold  in  the Offering.  The Company  has registered  the issuance  of 1,684,263
shares  of  Common  Stock  issuable  upon  the  exercise  of  options  currently
outstanding  or available to  be granted pursuant to  the Company's stock option
plans. Such shares are  available for immediate sale  in the public market  upon
exercise  of  the  options,  subject  in the  case  of  certain  holders  to the
limitations  applicable  to  affiliates  pursuant   to  Rule  144.  Holders   of
approximately  647,300 of such options have executed lock-up agreements with the
Representatives restricting the sale of such  shares in the public market for  a
period  of 90 days with respect to  149,100 option shares, 180 days with respect
to 149,100 option shares and 270 days with respect to 349,100 option shares. The
Company has also agreed that it will  not, without the prior written consent  of
the  Representatives, offer, sell  or otherwise dispose of  any shares of Common
Stock, options  or warrants  to acquire  shares of  Common Stock  or  securities
exchangeable  for or convertible into shares of Common Stock for a period of one
year following the date of this Prospectus other than pursuant to existing stock
option plans or upon the  exercise of outstanding warrants. The  Representatives
may, in their sole discretion and at any time without notice, release all or any
portion  of the securities  subject to such lock-up  agreements. The Company has
agreed to file a  registration statement under the  Securities Act covering  the
resale  of approximately 6,381,000  shares of Common  Stock (including shares of
Common Stock underlying certain warrants) promptly following consummation of the
Offering. Certain of such shares are subject to the lock-up agreements described
above. Following  the  effectiveness  of such  registration  statement  and  the
expiration  of the applicable lock-up periods, such shares will be available for
immediate sale  in the  public market  without limitation.  See "Description  of
Capital Stock," "Registration Rights" and "Underwriting."
    
 
                                       18
<PAGE>
                                  THE COMPANY
 
   
    The  Company  was incorporated  in California  in June  1988 under  the name
Alamar Biosciences,  Inc.  From  its  inception,  the  Company  was  engaged  in
developing,   manufacturing  and  marketing   microbiology  products,  including
alamarBlue and diagnostic  test kits under  the name Alamar.  AccuMed, Inc.  was
incorporated  in Illinois in November 1994  to acquire products and technologies
in the fields  of cytology  and microbiology. Effective  January 1995,  AccuMed,
Inc.  acquired  Sensititre as  a  wholly-owned subsidiary  and  acquired certain
assets  relating  to  Sensititre  products   in  the  United  States  from   the
microbiology  division of Radiometer  America, Inc. Sensititre  has been renamed
AccuMed International Limited and is currently a wholly-owned subsidiary of  the
Company.  In April 1995, the  Company and AccuMed, Inc.  entered into the Merger
Agreement providing for the  merger of AccuMed, Inc.  into the Company.  Pending
consummation  of the Merger, the Company's facilities in California were closed,
its manufacturing, sales, marketing and research and development functions  were
conducted  under contract by AccuMed, Inc.  and its executive offices were moved
to Chicago, Illinois. The Merger was consummated on December 29, 1995, at  which
time  the  surviving company  was renamed  AccuMed  International, Inc.  and was
reincorporated under Delaware law.  The Company commenced  sales of its  initial
cytopathology  product, the AcCell Series 2000, at  the end of the first quarter
of 1996. The Company is currently seeking to enter into an agreement pursuant to
which  a  third  party  would  manufacture  the  Company's  Alamar  microbiology
products, other than alamarBlue. However, there can be no assurance that such an
agreement  can be  reached. If  such an  agreement is  not reached,  the Company
intends to cease manufacturing  such products. The  Company is headquartered  in
Chicago,  Illinois  with  additional  facilities  in  Westlake,  Ohio  and  East
Grinstead, Sussex, England.
    
 
                                       19
<PAGE>
                                USE OF PROCEEDS
 
   
    The  net proceeds to  the Company from  the sale of  the 2,831,455 shares of
Common Stock offered  by the Company  hereby are estimated  to be $17.1  million
($21.4 million if the Underwriters' over-allotment option is exercised in full),
based  on  an assumed  offering price  of  $6.50 per  share and  after deducting
estimated  underwriting  discounts  and   commissions  and  estimated   offering
expenses.  The Company will  also receive approximately  $728,000 in proceeds in
connection with the exercise of options and warrants to acquire an aggregate  of
589,797 shares of Common Stock to be sold by certain Selling Stockholders in the
Offering.
    
 
   
    Management  anticipates that up to $4.0 million of the net proceeds from the
Offering will be  used for  the research,  development, testing  and pursuit  of
regulatory  approvals  for  new  cytopathology  product  offerings,  and  up  to
approximately $2.0 million will be used to scale-up manufacturing for the AcCell
Series 2000  and, if  cleared  for marketing,  the  TracCell 2000.  The  Company
intends  to use $4.0 million  of the net proceeds from  the Offering to fund the
proposed Oncometrics  Acquisition  and approximately  $1.4  million of  the  net
proceeds to fund the proposed RADCO Acquisition. The balance of the net proceeds
will be used for working capital and other general corporate purposes, including
up  to  $1.0 million  to  reduce accounts  payable.  A portion  of  the proceeds
allocated for working  capital and  general corporate  purposes may  be used  to
acquire  complementary businesses, products or  technologies, although there are
no current  agreements,  arrangements  or understandings  with  respect  to  any
material  acquisitions, other than as described in this Prospectus. Pending such
uses, the Company intends to invest such funds in short-term,  interest-bearing,
investment grade obligations.
    
 
   
    The  amounts  actually expended  for  each purpose  may  vary significantly,
depending on numerous  factors, including the  cost and timing  of expansion  of
manufacturing  capacity, the costs, timing and  success of the Company's product
development efforts, the costs and timing of potential acquisitions, the  extent
to  which  the  Company's  existing and  new  products  gain  market acceptance,
competing   technological   and   market    developments,   the   progress    of
commercialization  efforts  of  the  Company  and  its  distributors,  the costs
involved in preparing, filing, prosecuting, maintaining, enforcing and defending
patent claims and other intellectual  property rights, developments relating  to
regulatory  and  third party  reimbursement matters,  including CLIA,  and other
matters. The Company will not  receive any proceeds from  the sale of shares  of
Common  Stock offered by the  Selling Stockholders. See "Management's Discussion
and Analysis of  Financial Condition  and Results of  Operations," "Business  --
Cytopathology   --  Potential  Acquisition  of  Interest  in  Oncometrics,"  "--
Microbiology --  Potential  Acquisition of  RADCO"  and "Principal  and  Selling
Stockholders."
    
 
                                       20
<PAGE>
                          PRICE RANGE OF COMMON STOCK
 
   
    The  Company's Common Stock is quoted on  the Nasdaq Market under the symbol
"ACMI." The Common  Stock has  been approved,  subject to  effectiveness of  the
Offering,  for inclusion on the Nasdaq  National Market under the symbol "ACMI."
On August 27,  1996, the last  reported sale price  of the Common  Stock on  the
Nasdaq  Market was $6.50 per share. The  table below sets forth, for the periods
indicated, the range of high  and low sales prices for  the Common Stock on  the
Nasdaq   Market.  At  August  27,  1996,   the  Company  had  approximately  260
stockholders of record.
    
 
   
<TABLE>
<CAPTION>
                                                                             HIGH        LOW
                                                                           ---------  ---------
<S>                                                                        <C>        <C>
1994 FISCAL YEAR
  First Quarter..........................................................  $    4.13  $    2.13
  Second Quarter.........................................................       3.00       1.75
  Third Quarter..........................................................       2.75       1.00
  Fourth Quarter.........................................................       2.63       1.25
 
1995 FISCAL YEAR
  First Quarter..........................................................  $    1.75  $    0.31
  Second Quarter.........................................................       1.75       0.50
  Third Quarter..........................................................       1.50       0.81
  Fourth Quarter.........................................................       1.50       0.75
 
TRANSITION PERIOD (1)
  October 1, 1995 through December 31, 1995..............................  $    1.69  $    1.00
 
1996 FISCAL YEAR (1)
  First Quarter..........................................................  $    6.25  $    1.06
  Second Quarter.........................................................       9.38       4.88
  Third Quarter (through August 27, 1996)................................       7.00       4.50
</TABLE>
    
 
- --------------------------
   
(1) On December 31, 1995, the Company changed its fiscal year end from September
    30 to December 31.
    
 
                                DIVIDEND POLICY
 
    The Company has not paid any cash or other dividends on its Common Stock  to
date.  The  Company currently  intends  to retain  future  earnings, if  any, to
finance the  growth and  development of  its business  and does  not  anticipate
paying any cash dividends on its Common Stock in the foreseeable future.
 
                                       21
<PAGE>
                                 CAPITALIZATION
 
   
    The following table sets forth the short-term debt and capitalization of the
Company  (i) at  June 30,  1996, and  (ii) giving  pro forma  effect to  (a) the
Oncometrics Acquisition for $4.0 million in cash, (b) the RADCO Acquisition  for
$1.4  million in  cash, (c)  the sale  of the  2,831,455 shares  of Common Stock
offered by the Company hereby at an  assumed offering price of $6.50 per  share,
after  deducting  estimated  underwriting  discounts  and  commissions  and  the
estimated expenses  of the  Offering, and  (d)  the receipt  by the  Company  of
approximately  $728,000 in connection with the  exercise of options and warrants
to purchase an aggregate of 589,797 shares of Common Stock to be sold by certain
Selling Stockholders in the Offering. This  table should be read in  conjunction
with the Consolidated Financial Statements of the Company, including the related
Notes  thereto  and  the  Pro Forma  Condensed  Combining  Financial Statements,
appearing elsewhere in this Prospectus. See also "Use of Proceeds" and "Business
- -- Cytopathology  --  Potential Acquisition  of  Interest in  Oncometrics,"  "--
Microbiology  --  Potential Acquisition  of  RADCO" and  "Principal  and Selling
Stockholders."
    
 
   
<TABLE>
<CAPTION>
                                                                                               JUNE 30, 1996
                                                                                          -----------------------
                                                                                                     PRO FORMA AS
                                                                                           ACTUAL      ADJUSTED
                                                                                          ---------  ------------
                                                                                              (IN THOUSANDS)
<S>                                                                                       <C>        <C>
Short-term debt, including current portion of long-term liabilities (1).................  $     124   $      131
Long-term debt, net of current portion (2)..............................................         45          272
                                                                                          ---------  ------------
    Total debt..........................................................................        169          403
                                                                                          ---------  ------------
Minority interest.......................................................................         --          677
                                                                                          ---------  ------------
Stockholders' equity:
  Preferred Stock, $0.01 par value: 5,000,000 shares authorized; no shares issued and
   outstanding (actual and pro forma as adjusted).......................................         --           --
  Common Stock, $0.01 par value: 30,000,000 shares authorized; 17,525,748 shares issued
   and outstanding, actual; 21,087,000 shares issued and outstanding, pro forma as
   adjusted (3).........................................................................        175          209
  Additional paid-in capital............................................................     32,694       49,723
  Cumulative translation adjustment.....................................................         (2)          (2)
  Accumulated deficit...................................................................    (27,380)     (27,380)
                                                                                          ---------  ------------
    Total stockholders' equity..........................................................      5,487       22,550
                                                                                          ---------  ------------
      Total capitalization..............................................................  $   5,656   $   23,630
                                                                                          ---------  ------------
                                                                                          ---------  ------------
</TABLE>
    
 
- --------------------------
(1) Includes notes payable and capital lease obligations due within one year.
 
(2) Includes long-term portion of capital lease obligations.
 
   
(3) Based on the  number of shares  outstanding as of  June 30, 1996,  excluding
    940,955  outstanding  shares which  are  subject to  forefeiture  if certain
    specified earnings per share or  stock price performance thresholds are  not
    met during 1997. Excludes: (i) an aggregate of 5,917,605 shares reserved for
    issuance  upon exercise of  warrants outstanding at  August 27, 1996 (except
    for 480,402  shares  which  will  be  issued  upon  exercise  prior  to  the
    consummation  of the Offering  and sold in the  Offering) at exercise prices
    ranging from $0.25  to $5.00  per share,  with a  weighted average  exercise
    price of $3.21 per share; (ii) an aggregate of 1,602,971 shares reserved for
    issuance  upon the exercise of stock  options outstanding at August 27, 1996
    (except for  109,395 shares  which will  be issued  upon exercise  prior  to
    consummation  of the Offering  and sold in the  Offering) at exercise prices
    ranging from $0.63  to $8.38  per share,  with a  weighted average  exercise
    price  of $2.77 per share; and (iii) an aggregate of 543,741 shares reserved
    for issuance  upon exercise  of options  available at  August 27,  1996  for
    future  grant under  the Company's  stock option  plans. See  "Management --
    Stock Option  Plans"  and Note  11  and Note  16  of Notes  to  Consolidated
    Financial Statements.
    
 
                                       22
<PAGE>
                                    DILUTION
 
   
    The  pro forma net tangible  book value of the Company  at June 30, 1996 was
approximately negative $2.2 million or negative $0.13 per share of Common Stock.
Pro forma  net  tangible book  value  per share  represents  the amount  of  the
Company's  total pro  forma tangible net  worth (pro forma  tangible assets less
total pro forma liabilities), after giving effect to the Oncometrics Acquisition
and the RADCO  Acquisition, divided  by 17,525,748 shares  which represents  the
number of shares of Common Stock outstanding at June 30, 1996 (excluding 940,955
shares  of Common Stock subject to  forfeiture if certain specified earnings per
share or stock price  performance thresholds are not  met during 1997).  Without
taking into account any other changes in pro forma net tangible book value after
June  30, 1996, other than to give effect  to the receipt and application of the
estimated net proceeds  from the sale  of the 2,831,455  shares of Common  Stock
offered  by the  Company at an  assumed offering  price of $6.50  per share, the
issuance of such 589,797 shares  of Common Stock to  be sold by certain  Selling
Shareholders  in the  Offering and the  receipt by the  Company of approximately
$728,000 in connection therewith, the pro  forma net tangible book value of  the
Company as of June 30, 1996 would have been approximately $14.9 million or $0.71
per  share of Common Stock.  This represents an immediate  increase in pro forma
net tangible  book value  of $0.84  per share  to existing  stockholders and  an
immediate  dilution in pro forma  net tangible book value  of $5.79 per share to
new investors purchasing shares in the Offering. The following table illustrates
this per share dilution to new investors in the Offering:
    
 
   
<TABLE>
<CAPTION>
Assumed offering price per share....................................             $    6.50
<S>                                                                   <C>        <C>
  Pro forma net tangible book value per share at June 30, 1996......  $   (0.13)
  Increase per share attributable to new investors..................       0.84
                                                                      ---------
Pro forma net tangible book value per share after the Offering......                  0.71
                                                                                 ---------
Dilution per share to new investors.................................             $    5.79
                                                                                 ---------
                                                                                 ---------
</TABLE>
    
 
   
    The foregoing  calculations  assume  no  exercise  of  options  or  warrants
subsequent  to June 30, 1996, except as  described above. As of August 27, 1996,
there were :  (i) an aggregate  of 5,917,605 shares  reserved for issuance  upon
exercise  of outstanding warrants (including 480,402 shares which will be issued
upon exercise prior to consummation of the Offering and sold in the Offering) at
exercise prices ranging from $0.25 to  $5.00 per share, with a weighted  average
exercise  price of $3.21  per share; and  (ii) an aggregate  of 1,602,971 shares
reserved for issuance upon the exercise of outstanding stock options  (including
109,395  shares which will be issued upon  exercise prior to consummation of the
Offering and sold  in the  Offering) at exercise  prices ranging  from $0.63  to
$8.38  per share, with a weighted average  exercise price of $2.77 per share. To
the extent  such  options or  warrants  are  exercised, there  will  be  further
dilution to new investors. See "Management -- Stock Option Plans" and Note 11 of
Notes to Consolidated Financial Statements.
    
 
                                       23
<PAGE>
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
   
    The following Selected Consolidated Financial Data for the fiscal year ended
September  30, 1995 and for the three month transition period ended December 31,
1995 have been derived from the audited consolidated financial statements of the
Company as adjusted, where  indicated, to reflect  the Merger. The  Consolidated
Financial  Statements for  the fiscal  year ended  September 30,  1995 have been
audited by Coopers & Lybrand, L.L.P., independent certified public  accountants.
The  Consolidated  Financial Statements  for the  three month  transition period
ended December 31, 1995 have been audited by KPMG Peat Marwick LLP,  independent
certified public accountants. The information presented for the six months ended
June 30, 1996 is unaudited, but, in the opinion of the Company's management, all
adjustments  (consisting of normal  recurring adjustments) necessary  for a fair
presentation of the  information for  such period  have been  made. Results  for
interim  periods  are not  necessarily  indicative of  the  results that  may be
expected for the  full year. The  following should be  read in conjunction  with
"Management's  Discussion  and Analysis  of Financial  Condition and  Results of
Operations," and the Consolidated Financial Statements and related Notes thereto
and the Pro Forma Condensed Combining Financial Statements included elsewhere in
this Prospectus.
    
 
   
<TABLE>
<CAPTION>
                                                                                 THREE MONTH
                                                                                  TRANSITION
                                                          FISCAL YEAR ENDED      PERIOD ENDED           SIX MONTHS ENDED
                                                          SEPTEMBER 30, 1995  DECEMBER 31, 1995          JUNE 30, 1996
                                                          ------------------  ------------------  ----------------------------
                                                            PRO FORMA (1)       PRO FORMA (1)        ACTUAL      PRO FORMA (1)
                                                          ------------------  ------------------  -------------  -------------
                                                                         (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                       <C>                 <C>                 <C>            <C>
STATEMENT OF OPERATIONS DATA:
  Sales.................................................      $    4,144          $    1,184        $   2,312      $   2,318
  Cost of sales.........................................          (3,674)             (1,186)          (1,466)        (1,469)
                                                                 -------             -------      -------------  -------------
  Gross profit (loss)...................................             470                  (2)             846            849
  Operating expenses....................................           7,526               7,058(2)         7,582(2)       8,157
                                                                 -------             -------      -------------  -------------
  Operating loss........................................          (7,056)             (7,060)          (6,736)        (7,308)
  Other income (expense)................................            (113)                (81)           2,118          2,116
  Provision for income taxes............................              (1)                 (1)              (1)            (1)
  Minority interest.....................................             430                  65           --                175
  Net loss..............................................      $   (6,740)         $   (7,077)       $  (4,619)     $  (5,018)
                                                                 -------             -------      -------------  -------------
                                                                 -------             -------      -------------  -------------
  Net loss per common share.............................      $    (0.69)         $    (0.60)       $   (0.28)     $   (0.31)
                                                                 -------             -------      -------------  -------------
                                                                 -------             -------      -------------  -------------
  Weighted average common shares outstanding............           9,832               11,743           16,319         16,319
                                                                  -------             -------     -------------  -------------
                                                                  -------             -------     -------------  -------------
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                                                         JUNE 30, 1996
                                                                              DECEMBER 31, 1995   ----------------------------
                                                                              ------------------                  PRO FORMA
                                                                                    ACTUAL          ACTUAL     AS ADJUSTED (3)
                                                                              ------------------  -----------  ---------------
                                                                                               (IN THOUSANDS)
<S>                                                                           <C>                 <C>          <C>
BALANCE SHEET DATA:
  Working capital (deficit).................................................      $   (2,459)      $     572      $  15,061
  Total assets..............................................................           5,974           8,720         26,822
  Long-term debt, net of current portion (4)................................              90              45            272
  Total stockholders' equity................................................             729           5,487         22,550
</TABLE>
    
 
- --------------------------
(1) Includes the  operating results of  AccuMed, Inc. and  Oncometrics on a  pro
    forma  basis assuming the Merger and the Oncometrics Acquisition occurred on
    October 1,  1994.  See  "The  Company" and  Pro  Forma  Condensed  Combining
    Financial Statements.
 
   
(2) Includes $4.0 million and $3.5 million for the three month transition period
    ended   December  31,  1995  and  the   six  months  ended  June  30,  1996,
    respectively, recorded as a non-cash  charge against operations relating  to
    the  write-off of in-process research and development acquired in connection
    with the Merger.
    
 
   
(3) Includes  the  net  assets  of  Oncometrics  and  RADCO  assuming  that  the
    Oncometrics Acquisition and the RADCO Acquisition occurred on June 30, 1996,
    adjusted  to reflect  receipt and application  of the net  proceeds from the
    sale of the 2,831,455 shares of  Common Stock offered by the Company  hereby
    at  an assumed  offering price  of $6.50  per share  and the  receipt of the
    proceeds to the Company of approximately $728,000 in proceeds in  connection
    with the exercise, prior to the consummation of the Offering, of outstanding
    stock  options and  warrants to purchase  an aggregate of  589,797 shares of
    Common Stock  to  be sold  by  certain  Selling Stockholders.  See  "Use  of
    Proceeds,"  "Principal and Selling Stockholders" and "Description of Capital
    Stock."
    
 
   
(4) Long-term debt consists of capital  lease obligations. See Note 13 to  Notes
    to Consolidated Financial Statements.
    
 
                                       24
<PAGE>
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
    THIS   PROSPECTUS   CONTAINS,   IN  ADDITION   TO   HISTORICAL  INFORMATION,
FORWARD-LOOKING STATEMENTS THAT INVOLVE  RISKS AND UNCERTAINTIES. THE  COMPANY'S
ACTUAL  RESULTS COULD  DIFFER SIGNIFICANTLY  FROM THE  RESULTS DISCUSSED  IN THE
FORWARD-LOOKING STATEMENTS.  FACTORS  THAT COULD  CAUSE  OR CONTRIBUTE  TO  SUCH
DIFFERENCES INCLUDE THE FACTORS DISCUSSED BELOW AS WELL AS THE FACTORS DISCUSSED
IN  "RISK  FACTORS"  AND ELSEWHERE  IN  THIS PROSPECTUS.  SPECIAL  NOTE: CERTAIN
STATEMENTS SET FORTH  BELOW CONSTITUTE "FORWARD-LOOKING  STATEMENTS" WITHIN  THE
MEANING   OF  THE  REFORM  ACT.  SEE  "SPECIAL  NOTE  REGARDING  FORWARD-LOOKING
STATEMENTS" ON PAGE 2 FOR ADDITIONAL FACTORS RELATING TO SUCH STATEMENTS.
 
OVERVIEW
 
   
    Effective December 29,  1995, AccuMed,  Inc. was  merged with  and into  the
Company.  The  results of  operations  reflected in  the  Company's consolidated
statement of operations  for the  quarter ended  March 31,  1996 and  subsequent
periods  include the operations of the two merged businesses, whereas results of
operations from prior periods and years reflect the operations and sales of  the
Alamar  microbiology product line only. The  historical results of operations of
the Company presented herein are not necessarily indicative of future results of
operations of the Company. See "The Company."
    
 
   
    The Merger has been accounted for  as a purchase, which resulted in  certain
charges.  The value of the securities not subject to contingencies issued by the
Company upon  consummation  of the  Merger  exceeded  the value  of  the  assets
acquired  by $6.6 million. At December 31, 1995, $4.0 million of such amount was
allocated to  acquired  in-process  research and  development  and  written  off
immediately  as a non-cash charge against operations. The remaining $2.6 million
was recorded  as purchased  technology and  is being  amortized over  ten  years
beginning  December 31,  1995. Certain of  the securities issued  by the Company
upon consummation of the Merger were subject to forfeiture if specified earnings
per share or stock  price performance goals were  not met following the  Merger.
During  the quarter ended March 31,  1996, the contingencies were satisfied with
respect to a portion of such securities having a then current fair market  value
of  $5.4 million.  Of such  amount, $3.5 million  was allocated  to acquired in-
process research  and development  and  written off  immediately as  a  non-cash
charge  against operations. The remaining $1.9 million was recorded as purchased
technology and is being  amortized over ten years  beginning March 31, 1996.  If
specified  contingencies applicable  to the  remaining 940,955  shares of Common
Stock and warrants to purchase up to 63,472 shares of Common Stock issued in the
Merger are met during  1997, an amount  equal to the fair  market value of  such
securities  at the  time such  contingencies are  satisfied will  be recorded as
goodwill. It is anticipated that such goodwill will be amortized over ten  years
and that the Company will continue to assess the recoverability of such asset as
prescribed  by the Company's  current accounting policies.  See "Risk Factors --
Potential Fluctuations in  Future Quarterly  Results" and  Note 16  of Notes  to
Consolidated Financial Statements.
    
 
    Pending  consummation of  the Merger,  the Company  took various  actions to
streamline and relocate its operations. The Company's manufacturing facility  in
Sacramento,  California was closed in August 1995, and all obligations under its
lease were satisfied during  the second quarter of  1996. During the summer  and
fall  of 1995, the Company terminated the employment of all its employees, other
than two  officers. From  July 1,  1995 until  consummation of  the Merger,  the
Company's   manufacturing,  marketing,  sales,  distribution  and  research  and
development functions were  performed by  AccuMed, Inc.  under contracts.  After
consummation  of  the  Merger,  the Company  resumed  research  and development,
manufacturing and marketing and sales activities, and hired a significant number
of employees.
 
   
    At June 30, 1996, the Company  had an accumulated deficit of $27.4  million.
On  December 31, 1995, the Company changed its fiscal year end from September 30
to December 31.
    
 
                                       25
<PAGE>
   
RESULTS OF OPERATIONS
    
 
   
  SIX MONTHS ENDED JUNE 30, 1995 AND 1996
    
 
   
    Revenues from sales increased  from $321,000 for the  six months ended  June
30,  1995 to $2.3 million  for the comparable 1996  period, primarily due to the
inclusion of sales of the Sensititre product line as a result of the acquisition
of the Sensititre business at the end of 1995 and initial sales of the Company's
cytopathology products.
    
 
   
    Cost of sales increased from $471,000 for the six months ended June 30, 1995
to $1.5 million for the comparable 1996 period, primarily due to the  additional
cost  of  sales  of  the microbiology  product  line  and  initial cytopathology
instrument sales.
    
 
   
    General and  administrative expenses  increased from  $860,000 for  the  six
months  ended June  30, 1995  to $2.0  million for  the comparable  1996 period,
primarily due  to (i)  recognition  of a  non-cash  charge attributable  to  the
issuance  of warrants to purchase an aggregate of 100,000 shares of Common Stock
at an  exercise  price  of  $2.125 per  share  as  compensation  for  consulting
services, (ii) costs of consolidating staff and relocating operations, and (iii)
increased investor relations efforts.
    
 
   
    Research and development expenses increased from $140,000 for the six months
ended  June 30, 1995 to  $4.8 million for the  comparable 1996 period, primarily
due to a  non-cash charge against  operations of $3.5  million representing  the
write-off of in-process research and development acquired in connection with the
Merger,  and  resumption of  research and  development activities  following the
Merger.
    
 
   
    Sales and marketing expenses increased from $75,000 for the six months ended
June 30, 1995 to $842,000 for  the comparable 1996 period, due to  reinstatement
of domestic sales and marketing efforts which had been suspended during the 1995
period.
    
 
   
    Other  income increased from $96,000 for the  six months ended June 30, 1995
to $2.5  million for  the  six months  ended June  30,  1996, primarily  due  to
payments  of $3.5 million from Becton, Dickinson and Company ("Becton") pursuant
to a license agreement entered into in October 1995 (the "Becton Agreement"). At
December 31, 1996, $1.4 million of  such payments had been recorded as  deferred
revenues pending resolution of subsequently resolved litigation. Offsetting such
income  was $954,000 of expense  for the first six months  of 1996 recorded as a
non-cash charge representing the fair market  value of warrants issued. Of  such
amount,  (i) $852,000  is attributable to  warrants to purchase  an aggregate of
687,500 shares of Common Stock, with a weighted average exercise price of  $3.73
per  share, issued to investors in connection with the initial capitalization of
RADCO and (ii) $102,000 is attributable to warrants to purchase an aggregate  of
100,000  shares of Common Stock, at an exercise price of $1.25 per share, issued
in consideration of a loan to the Company of $250,000 from the warrantholder.
    
 
   
    Net loss increased from $1.2 million for the six months ended June 30,  1995
to  $4.6 million for the six months  ended June 30, 1996, primarily attributable
to  the  non-cash  charge  against  operations  relating  to  the  write-off  of
in-process  research and development  and the fair value  of warrants issued, as
described above. The net  loss per share  for the first six  months of 1995  was
$0.20  compared to $0.28 for the comparable  1996 period. The increased net loss
was diluted by an increase in the weighted average shares outstanding.
    
 
   
    The Company's accounts  receivable increased by  $530,000 from December  31,
1995  to  June  30,  1996,  primarily due  to  sales  of  the  Company's initial
cytopathology products and varying payment terms for the Company's international
microbiology distributors.
    
 
   
    The Company's production inventory increased  by $371,000 from December  31,
1995  to June  30, 1996  as a result  of increased  levels of  raw materials and
finished goods inventories acquired  to support sales  of the Company's  initial
cytopathology products.
    
 
   
    The  Company's accounts payable  were $2.2 million  as of June  30, 1996, an
increase of  $236,000 from  December  31, 1995,  primarily attributable  to  the
increase in inventories described above.
    
 
                                       26
<PAGE>
   
  THREE MONTHS ENDED DECEMBER 31, 1994 AND 1995
    
 
   
    The  three months  ended December 31,  1995 represent  the transition period
resulting from the change in the Company's fiscal year end from September 30  to
December  31.  While  revenues  remained  virtually  unchanged,  cost  of  sales
increased from $227,000  in the  1994 quarter to  $339,000 in  the 1995  period.
General  and administrative costs  increased substantially from  $384,000 in the
1994 quarter to  $1.4 million in  the 1995  period, primarily due  to (i)  legal
expenses   related  to  subsequently  resolved   litigation,  (ii)  expenses  of
relocating the Company's operations, and (iii) payments to AccuMed, Inc. for its
services pursuant to  manufacturing, distribution and  research and  development
agreements pending consummation of the Merger. Research and development expenses
increased  from $151,000 in the 1994 quarter to $4.0 million in the 1995 period,
due to a  non-cash charge  against operations  relating almost  entirely to  the
write-off of in-process research and development acquired in connection with the
Merger.  Sales and marketing expenses decreased from $171,000 in the 1994 period
to $7,000  in  the 1995  period,  as the  sales  and marketing  activities  were
performed  by  AccuMed, Inc.  prior  to the  Merger  pursuant to  a distribution
agreement.
    
 
   
    The net loss increased from $846,000 for the 1994 period to $5.7 million for
the 1995 period. The increase resulted primarily from a non-cash charge  against
operations  relating  to the  write-off of  in-process research  and development
acquired in connection  with the Merger,  and increased administrative  expense.
The  net loss per share for the 1994  period was $0.17 compared to $0.49 for the
1995 period.
    
 
   
  FISCAL YEARS ENDED SEPTEMBER 30, 1993, 1994 AND 1995
    
 
   
    Revenues for the fiscal years ended  September 30, 1993, 1994 and 1995  were
$419,000,  $1.2  million and  $515,000,  respectively. Revenues  in  fiscal 1994
included  approximately  $473,000  of  international  instrument  shipments  and
$92,000  of contract research,  both of which  were absent from  the fiscal 1995
year and account for the decrease in  revenues from fiscal 1994 to fiscal  1995.
During  fiscal 1994, the Company had additional products available for sale that
were in development during fiscal 1993. Cost of sales increased from $911,000 in
fiscal 1993  to $1.5  million in  fiscal  1994 and  decreased slightly  to  $1.4
million  in fiscal 1995.  The cost of  sales relative to  revenues was higher in
1993 and 1995 as compared to 1994 due to increased sales of instruments in  1994
which carry a higher margin as compared to the test panels to which the 1993 and
1995  revenues related.  General and administrative  expenses increased slightly
from $1.1 million in fiscal 1993 to  $1.2 million in fiscal 1994, and  increased
substantially  to $2.1 million in fiscal 1995.  The increase from fiscal 1994 to
fiscal 1995 was primarily  due to legal and  accounting expenses related to  the
Merger  and subsequently resolved litigation.  Research and development expenses
decreased from  $683,000  in fiscal  1993  to $580,000  in  fiscal 1994  and  to
$387,000  in  fiscal 1995,  primarily  due to  the  suspension of  virtually all
research and  development activities  during  the 1995  fiscal year.  Sales  and
marketing  expenses decreased from $960,000 in fiscal 1994 to $309,000 in fiscal
1995, due to  suspension of virtually  all of the  Company's domestic sales  and
marketing efforts beginning in November 1994.
    
 
   
    The  net loss  for fiscal  1993 was  virtually unchanged  compared to fiscal
1994. The net loss increased from $3.1  million for fiscal 1994 to $3.8  million
for  fiscal 1995, primarily  due to increased  legal and administrative expenses
associated with  subsequently  resolved  litigation.  The  net  loss  per  share
decreased  from  $1.00 for  fiscal  1993 to  $0.65 in  1994  and $0.59  in 1995,
primarily due to increases in the weighted average shares outstanding offset  in
part by a lower net loss in fiscal 1994 compared to fiscal 1995.
    
 
LIQUIDITY AND CAPITAL RESOURCES
 
   
    The  Company has been  substantially dependent on  the private placements of
its debt and equity securities and  the proceeds of its initial public  offering
of  securities consummated in  October 1992 to fund  its cash requirements. From
the initial  public offering  through  June 30,  1996,  the Company  has  raised
approximately  $22.4 million in  aggregate net proceeds  from the initial public
offering and  certain  equity  private placements.  The  Company's  most  recent
private  placements were closed in May and  June 1996, resulting in the issuance
of an  aggregate  of  255,000  shares  of  Common  Stock  for  net  proceeds  of
approximately  $1.4  million. During  the second  quarter  of 1996,  the Company
expected to receive $2.0
    
 
                                       27
<PAGE>
   
million in  cash consideration  for a  debenture that  was to  have been  issued
effective  April 30, 1996; however, such consideration was not received and such
debenture was  not  issued. During  the  second  quarter of  1996,  the  Company
received an aggregate of $471,000 upon the exercise of certain stock options and
an aggregate of $441,000 upon the exercise of certain warrants.
    
 
   
    In connection with the Company's initial public offering and certain private
placements,  the Company issued  warrants to purchase  an aggregate of 2,702,905
shares of Common Stock (the "Redeemable  Warrants"). As of August 27, 1996,  200
shares of Common Stock had been issued as a result of the exercise of Redeemable
Warrants. If the closing price per share of Common Stock exceeds $7.50 per share
(subject  to  adjustment) for  a  minimum of  20  consecutive trading  days, the
Company would have the right to  redeem the Redeemable Warrants, upon notice  of
not  less than 60 days given to holders  within three days following any such 20
day period, at a  redemption price of $0.25  per underlying share. The  exercise
price  of the Redeemable  Warrants, which expire  October 1, 1997,  is $5.00 per
share. If  all Redeemable  Warrants were  exercised, of  which there  can be  no
assurance,  the  Company  would  receive approximately  $13.5  million  in gross
proceeds. If  the  Offering  is  completed, the  Company  has  agreed  with  the
Underwriters not to redeem the Redeemable Warrants, without the Representatives'
consent, prior to one year following the date of this Prospectus.
    
 
   
    Pursuant  to the  Becton Agreement,  Becton has  a semi-exclusive, worldwide
license to the  Company's alamarBlue  technology for  a specific  field of  use.
Becton  was obligated to pay $3.5 million in  cash for use of the technology, of
which $1.5 million was received during 1995 and $2.0 million was received during
the first quarter of 1996. Of  such amount, $500,000 will be creditable  against
future  royalty  payments,  if  any.  Becton is  obligated  to  pay  the Company
royalties on net sales of  products incorporating the technology licensed  under
the  Becton Agreeement during its five-year term. To the Company's knowledge, as
of the date of  this Prospectus, Becton  has not produced  or sold any  products
incorporating such technology.
    
 
   
    At June 30, 1996, the Company had $2.2 million of accounts payable, of which
$1.7  million was past the respective original due dates. In late 1995 and early
1996, the  Company reached  agreements with  certain vendors  providing for  the
extended  repayment of amounts owed by the  Company to such vendors. At June 30,
1996, pursuant to  such agreements, approximately  $522,000 remained payable  by
the  Company  to  such vendors  in  scheduled monthly  installments  through the
remainder of 1996. Other  amounts owed to various  vendors and suppliers may  be
subject to late charges of up to 1.5% per month. The Company intends to apply up
to  $1.0 million  of the  net proceeds  of the  Offering to  the repayment  of a
portion of the accounts payable not subject to extended repayment agreements.
    
 
   
    The Company intends  to expend  substantial funds for  research and  product
development,   possible  acquisitions,   scale-up  of   manufacturing  capacity,
reduction of accounts payable  and other working  capital and general  corporate
purposes.  Although the Company believes that  the net proceeds of the Offering,
together with interest thereon, existing cash balances and internally  generated
funds  will be sufficient to finance  the Company's projected operations through
at least the next twelve months, there  can be no assurance to that effect.  The
Company's  future liquidity and  capital requirements will  depend upon numerous
factors, including the costs and timing of expansion of manufacturing  capacity,
the  costs, timing and success of the Company's product development efforts, the
costs and timing of  potential acquisitions, the extent  to which the  Company's
existing  and new products  gain market acceptance,  competing technological and
market developments, the  progress of commercialization  efforts of the  Company
and  its  distributors, the  costs involved  in preparing,  filing, prosecuting,
maintaining, enforcing  and  defending  patent  claims  and  other  intellectual
property   rights,   developments  related   to   regulatory  and   third  party
reimbursement  matters,  including  CLIA,  and  other  factors.  If   additional
financing  is needed,  the Company  may seek  to raise  additional funds through
public or private financings, collaborative relationships or other arrangements.
    
 
    The Company  currently  has  no  commitments  with  respect  to  sources  of
additional  financing, and  there can  be no  assurance that  any such financing
sources, if needed, would be available to the Company or that adequate funds for
the  Company's  operations,  whether  from  the  Company's  revenues,  financial
 
                                       28
<PAGE>
   
markets,  collaborative or  other arrangements  with corporate  partners or from
other sources, will  be available when  needed or on  terms satisfactory to  the
Company.  The failure of the Company to obtain adequate additional financing may
require the Company to delay, curtail or scale back some or all of its  research
and development programs, sales and marketing efforts, manufacturing operations,
clinical  studies  and  regulatory  activities and,  potentially,  to  cease its
operations. Any additional equity financing may involve substantial dilution  to
the  Company's  then-existing  stockholders.  See  "Use  of  Proceeds"  and  the
Consolidated  Financial  Statements  and  the  Pro  Forma  Condensed   Combining
Financial Statements and Notes thereto.
    
 
POTENTIAL IMPACT OF ACQUISITION OF INTEREST IN ONCOMETRICS
 
   
    In  August 1996, the Company entered into definitive agreements to acquire a
two-thirds equity  interest,  on  a  fully-diluted  basis,  in  Oncometrics  for
aggregate  cash  consideration  of  $4.0 million.  Of  such  consideration, $2.0
million is to be paid to Xillix for currently outstanding Oncometrics stock, and
$2.0 million is to be paid to Oncometrics for newly issued Oncometrics stock. It
is anticipated that such transaction would  be accounted for under the  purchase
method  of  accounting,  resulting  in approximately  $1.6  million  of acquired
in-process research and development and approximately $1.1 million of  purchased
technology.  Amounts recorded  as acquired  in-process research  and development
would be written off as  a charge to earnings in  the period of the  Oncometrics
Acquisition.  Amounts recorded as  purchased technology would  be amortized over
the expected useful  life of such  technology, currently anticipated  to be  ten
years.  Furthermore, at June 30, 1996, Oncometrics had approximately $234,000 in
long-term, third party debt,  including the current  portion of long-term  debt,
which  the Company will  assume if the  Oncometrtics Acquisition is consummated.
See "Use of Proceeds" and "Business -- Cytopathology -- Potential Acquisition of
Interest in Oncometrics" and Pro Forma Condensed Combining Financial Statements.
    
 
POTENTIAL IMPACT OF ACQUISITION OF RADCO
 
   
    In August 1996,  the Company  also entered  into a  definitive agreement  to
acquire  the common  stock of RADCO  not currently  owned by the  Company and to
retire approximately $1.2 million in  aggregate principal amount of RADCO  Notes
issued  by RADCO in  connection with the  initial capitalization of  RADCO at an
aggregate cost  to the  Company of  approximately $1.4  million in  cash. It  is
anticipated  that such  transaction would  be accounted  for under  the purchase
method of accounting, resulting in approximately $630,000 of acquired in-process
research and development. Such amount is expected to be written-off as a  charge
to  earnings in the period  of the RADCO Acquisition.  See "Use of Proceeds" and
"Business --  Microbiology --  Potential  Acquisition of  RADCO" and  Pro  Forma
Condensed Combining Financial Statements.
    
 
                                       29
<PAGE>
                                    BUSINESS
 
   
    AccuMed  designs, manufactures and markets diagnostic screening products for
clinical diagnostic  laboratories  serving the  cytopathology  and  microbiology
markets.  The Company's  primary focus  is on  the development  of cytopathology
products that support the review and analysis of Pap smears in order to  improve
the  quality  of cell  analysis and  increase accuracy  and productivity  in the
laboratory. The Company  commenced sales of  its initial cytopathology  product,
the  AcCell Series 2000 automated slide  handling and microscopy workstation, at
the end  of the  first  quarter of  1996. The  Company  is currently  testing  a
prototype  specimen mapping workstation, the  TracCell 2000, which automatically
pre-screens Pap smear slides to identify and create a computerized map of  empty
space  and certain non-clinically relevant portions  of the specimen to permit a
more efficient analysis of the test slide. The Company expects to file a  510(k)
Notification  with the FDA for the TracCell 2000 by the end of 1996. The Company
has recently entered into an agreement with Olympus America, a leading  supplier
of  microscopes to the  cytopathology market, pursuant  to which Olympus America
has exclusive third party distribution rights to the AcCell Series 2000 and,  if
successfully developed and cleared for marketing by the FDA and other applicable
regulatory authorities, the TracCell 2000 in the Olympus Territory.
    
 
   
    The  Company  also develops,  manufactures and  markets IN  VITRO diagnostic
microbiology products for the clinical laboratory, veterinary and pharmaceutical
markets. The Company offers the microbiology laboratory a variety of FDA-cleared
products, under the trade  name Sensititre, for the  MIC/ID testing of  bacteria
suspected  of causing  infections and for  measuring the  susceptibility of such
bacteria  to  different  types  and  concentrations  of  antibiotics.  AccuMed's
microbiology  products include  disposable test  kits and  a range  of automated
instruments. The  Company  also  markets alamarBlue,  a  proprietary,  non-toxic
indicator reagent that measures cell growth for IN VITRO testing. The Company is
developing  the KB Reader, an automated  instrument designed to read the results
of a Kirby-Bauer method susceptibility test, and, pursuant to an agreement  with
RADCO,  is  developing a  diagnostic microbiology  test  panel and  an automated
reading instrument. There  can be no  assurance that any  such products will  be
successfully developed or marketed.
    
 
   
    AccuMed's  objective is to establish the AcCell Series 2000 and the TracCell
2000 as  the  leading microscopy  workstations  for the  primary  screening  and
analysis  of  cytology specimens  while developing  other new  cytopathology and
microbiology products. The key elements  of the Company's strategy include:  (i)
establishing the AcCell Series 2000 and, if cleared for marketing by the FDA and
other  applicable regulatory authorities, the TracCell 2000 in the worldwide Pap
smear screening market through  distribution agreements and strategic  alliances
with  major  market participants,  (ii)  exploiting other  applications  for the
Company's cytopathology technology  such as histology  and pathology  laboratory
work,  (iii)  continuing  to  acquire,  develop  and  enhance  technologies that
complement the  Company's  existing technology  base  and (iv)  integrating  the
Company's proprietary microbiology technologies into new products.
    
 
CYTOPATHOLOGY
 
  CERVICAL CANCER SCREENING
 
   
    An  estimated 440,000  new cases  of cervical  cancer are  reported annually
worldwide. The American  Cancer Society estimates  that, in 1996  in the  United
States,  15,700 women will be diagnosed  with invasive cervical cancer and 4,900
women will die of cervical cancer. However, virtually all cervical cancer  cases
can  be  effectively treated  with timely  intervention  if detected  early. The
treatment of cervical cancer after it  reaches the invasive stage, however,  may
require  surgery and chemotherapy or  radiation treatments, which are difficult,
expensive and  may  be unsuccessful.  Cervical  cancer is  preceded  by  curable
precancerous lesions that progress without symptoms over a period of years until
they  become invasive,  penetrating the cervical  epithelium (cellular covering)
and entering  the bloodstream  or lymph  system. In  1996, an  estimated  65,000
American women will be diagnosed with cervical carcinoma IN SITU, a precancerous
condition.  In order to detect precancerous lesions, gynecologists in the United
States typically recommend annual screening examinations for all women over  the
age of 18.
    
 
                                       30
<PAGE>
   
    The  Pap smear  is currently the  most widely-used screening  test for early
detection of  cervical cancer  and related  precancerous conditions.  Pap  smear
tests are generally performed by an estimated 4,500 clinical laboratories in the
United   States,  including  hospital   laboratories,  commercial  laboratories,
reference laboratories and gynecologists'  office laboratories. It is  estimated
that  in 1996 over 150  million Pap smear specimens  will be screened worldwide,
including over 50 million in the United States. According to the American Cancer
Society, widespread and  regular use of  the Pap  smear as a  screening test  is
believed  to have contributed to  a greater than 70%  decrease in mortality from
cervical cancer in the United States in the past 45 years.
    
 
  PAP SMEAR TESTS
 
   
    The conventional Pap smear testing process  begins with the collection of  a
cervical  specimen  during  a  gynecological  examination.  The  physician  then
manually smears the specimen onto a microscope slide, which is then submitted to
the clinical laboratory for cytopathological microscopic examination, along with
patient data such as medical history, day in menstrual cycle, family history and
known risk  factors.  Gathering and  collating  these patient  data,  which  are
critical  to  the  proper evaluation  of  a  specimen, is  a  time-consuming and
labor-intensive process at both the  physician's office and the laboratory.  The
laboratory  administrative personnel who  gather such data  are also responsible
for manually recording the results of the Pap smear tests and ensuring that both
the slide and  paperwork provided  to the  cytotechnologist relate  to the  same
patient.
    
 
    At  the laboratory, a cytotechnologist,  a medical professional with special
training in  the examination  and  interpretation of  human cells,  conducts  an
initial  microscopic review  of a  prepared slide.  The cytotechnologist screens
each slide with a  microscope to differentiate diseased  or abnormal cells  from
healthy  cells based on numerous physical characteristics, including size, shape
and structural details of the cells and nuclei. Other factors considered are the
texture of the specimen, the structure of cell grouping, background of the smear
and the patient  medical data  supplied by the  referring physician.  Typically,
each  Pap  smear specimen  is then  classified in  accordance with  The Bethesda
System for Reporting  Cervical/Vaginal Cytologic Diagnoses  into one of  several
categories  ranging from normal (negative) to cancerous. Any specimen classified
as other than negative  is generally referred to  a senior cytotechnologist  and
then  a pathologist  for further  review and  final diagnosis.  A woman  with an
abnormal Pap smear  test may  have a  repeat Pap  smear test  or undergo  costly
colposcopy and biopsy procedures.
 
   
    Cytotechnologists   are  regulated  under   CLIA,  which  requires  cytology
laboratories to  perform  proficiency testing  and  quality control  by  testing
cytotechnologists  to assure a minimum competence  level. Pap smear screening is
exceedingly complex and tedious work. Cytotechnologists are required by CLIA  to
screen  100% of each Pap smear slide,  which when done correctly requires six to
eight minutes of microscope  viewing per slide. Over  90% of specimens  reviewed
are  negative. Even  non-negative specimens may  contain only 20  to 30 abnormal
cells out of a total of  as many as 50,000 to 300,000  cells on the slide. As  a
result,   slide  interpretation  errors   can  be  caused   by  fatigue  of  the
cytotechnologist and the habituation effect of constantly viewing  predominantly
negative   specimens.  To  potentially   reduce  the  effects   of  fatigue  and
habituation, CLIA limits to 100 the number of slides that a cytotechnologist  is
permitted  to  screen in  a  day, and  many  states and  foreign  countries have
established  even   lower  slide-per-day   limits.  Although   CLIA  permits   a
cytotechnologist  to  review up  to  100 Pap  smear  slides per  day, management
estimates that, as a practical matter, the manual review process requiring  100%
slide  review limits the ability of the cytotechnologist to reviewing an average
of 60 slides per day.
    
 
   
    In conducting the  conventional Pap smear  screening, cytotechnologists  are
required  to locate  and review  information from  the patient's  file, load and
position the  slide  on  the  microscope stage,  manually  move  the  slide  and
continually  focus the microscope  on as many  as 400 fields  of view per slide.
They then place  a mark on  selected abnormal  cells on the  slide and  manually
record the diagnosis. CLIA requires that at least 10% of specimens classified as
negative  be rescreened for quality  control. Rescreening is accomplished either
by  the  methods  described  above  or  by  rescreening  instruments.  See   "--
Competition."
    
 
                                       31
<PAGE>
  CONVENTIONAL PAP SMEAR TEST LIMITATIONS
 
   
    The  conventional Pap  smear screening process  has significant limitations,
primarily  relating  to  how  individual  cytotechnologists  and  administrative
personnel  analyze  slides,  diagnose,  record  the  results  of  such analysis,
document the screening process and gather and collate relevant patient data. Any
breakdown  in  this  process  could  result  in  slide  interpretation   errors,
administrative errors and increased potential for litigation/liability risks.
    
 
   
    SLIDE  INTERPRETATION ERRORS.   The process of  screening and interpreting a
Pap smear  test is  complex  and tedious,  and  is prone  to  error due  to  the
difficulty of properly locating, evaluating and categorizing subtle changes in a
very  small number of cells among a vastly larger cell population as well as the
fact that  most  of  the  specimens reviewed  are  classified  as  negative.  In
addition,  cytotechnologists are  usually encouraged by  laboratory economics to
review as many slides as possible within the current CLIA constraint of 100  per
day.  As a result, slide interpretation errors can be caused by cytotechnologist
fatigue and the habituation effect of constantly viewing predominantly  negative
specimens.  A false negative  diagnosis may allow  the disease to  progress to a
later stage  of development  before  being detected,  thereby requiring  a  more
expensive  and invasive  course of treatment  and diminishing  the likelihood of
successful  treatment.  According  to  the  JOURNAL  OF  THE  AMERICAN   MEDICAL
ASSOCIATION, clinical laboratories generally experience false negative diagnosis
rates of 5% to 30%.
    
 
    ADMINISTRATIVE  ERRORS.  Gathering  accurate patient data  and ensuring that
the data are  correctly matched  with the patient's  slides provide  significant
administrative   challenges.   Laboratories   employ   full-time  administrative
personnel to assemble patient data, enter patient data on a physical report  and
collate  that  data  with  the  corresponding  slide.  However,  the  volume  of
information  that  must  be  processed  and  organized  manually  can  lead   to
mismatching errors which, in turn, may lead to diagnostic errors.
 
    LITIGATION/LIABILITY  RISKS.  Failure by a laboratory to properly diagnose a
Pap smear specimen can result in significant legal liability. Because there  are
no  current means to  objectively demonstrate what  procedures were conducted by
the cytotechnologist or  that 100%  of the  slide was  reviewed, suits  claiming
negligent  misdiagnosis are  difficult to defend  and may  result in unwarranted
liability.
 
  CYTOPATHOLOGY PRODUCTS
 
    AccuMed's primary focus is on the development and marketing of cytopathology
products that support the review and analysis of cervical Pap smears,  including
slide  management  and  mapping  and  critical  data  management  functions. The
Company's products are designed  to automate multiple aspects  of the Pap  smear
screening process without significantly modifying existing laboratory practices.
The  Company's  current  cytopathology  products  are  the  AcCell  Series  2000
workstations. The Company has developed and is currently testing a prototype  of
the  TracCell 2000 slide mapping workstation. The Company is developing software
and hardware  for a  second generation,  fully automated,  high volume,  mapping
product,  the TracCell  3000, to augment  its workstation  product offering. The
Company is also developing a series of educational and testing products.
 
   
    THE ACCELL SERIES 2000.  The AcCell Series 2000 workstations consist of  the
AcCell   2000  and  the   AcCell  2001.  The  AcCell   2000  is  an  interactive
computer-controlled slide handling and precision microscopy workstation that  is
supported  with  comprehensive  data  management  capabilities.  The workstation
consists of a high quality precision microscope (supplied by the Company or  the
customer),   a  computer-controlled  moveable  stage,   a  bar  code  reader,  a
proprietary  slide  marking  mechanism  (the  "dotter"),  an  optional  personal
computer  for the data management system  and a stage-control mouse developed by
the Company. The  system operates in  a Microsoft Windows-Registered  Trademark-
environment  using the Company's proprietary  software. The AcCell 2001 contains
all the features of the AcCell 2000  in addition to an automated cassette  slide
loading  and unloading system  which handles up  to 30 slides  per cassette. The
AcCell 2001 is designed to be used in conjunction with a TracCell 2000.
    
 
                                       32
<PAGE>
   
    The AcCell Series 2000 can be linked to the gynecologist's office and to the
laboratory's internal  information  system  in  order  to  provide  computerized
support,  from the  time of  entering patient  information when  the specimen is
taken through the  time of  generating reports  at the  laboratory and  doctor's
office and finally to billing of the patient or payor. After specimen collection
by  the gynecologist, the  gynecologist's staff, using  software provided by the
Company through the  laboratory either on  a network  or on a  disk, enters  the
patient's relevant medical history into the system and generates a bar code that
is  placed on the slide and the hard copy  of the work order sent with the slide
to the laboratory. The bar code  contains basic patient information such as  the
patient's  name and  date of specimen  collection. The slides  and patient data,
either in  electronic  format  or  hard copy,  are  then  transferred  from  the
gynecologist to the clinical laboratory for review.
    
 
   
    At  the laboratory, the slide is assigned by the laboratory administrator to
the cytotechnologist  for  review.  The  slide is  placed,  either  manually  or
automatically,  on the AcCell stage and is read by the bar code reader to ensure
that  proper   patient  data   is  displayed   on  the   computer  monitor   for
cytotechnologist  review.  The  slide  is  then  automatically  moved  under the
microscope, and the  microscope is  power-focused by  the cytotechnologist.  The
AcCell  Series  2000 automatically  moves the  stage under  the microscope  in a
pattern  and   at  a   speed   selected  by   the  cytotechnologist   that   the
cytotechnologist  can override  at any  time. As  the slide  is moved  under the
microscope, the  cytotechnologist records  into the  system's memory  the  exact
coordinates  of abnormal cells by clicking  a button on the stage-control mouse.
At the  conclusion of  the  review, selected  abnormal cells  are  automatically
marked  by the dotter with a small physical dot on the slide so that they may be
relocated easily for further manual review. The AcCell Series 2000 will record a
complete analysis only after 100% of the slide has been scanned or a  sufficient
number of abnormal cells have been located to designate the slide as potentially
positive.  Typically, review of a single slide takes five to seven minutes using
the AcCell Series 2000.
    
 
    After completing  review  of the  slide,  the cytotechnologist  selects  the
appropriate  diagnosis  from a  table in  the data  management system.  The data
management system records all aspects of  the Pap smear screening and saves  the
information  for  future review.  The  AcCell Series  2000  generates management
reports, records  the exact  location  of marked  cells  for a  given  specimen,
digitally  stores  relevant  information  and  provides  full  documentation for
laboratory quality control and regulatory compliance. The Company believes  that
by providing a variety of automated features and a comprehensive data management
system,  the AcCell Series  2000 has the  potential to reduce  the risk of human
slide reading and administrative error.
 
   
    To extend  the  functionality of  the  AcCell Series  2000,  several  system
configuration  options are available, and multiple workstations can be networked
together  within  a  laboratory.   The  MacroVision-TM-,  a  proprietary   image
enhancement  system, can be attached to the  AcCell platform in order to allow a
cytotechnologist to view  on a  monitor the  specimen being  reviewed under  the
microscope.  The  Company  is  currently  developing  proprietary  telepathology
software which, if developed, would enable the AcCell workstation to be operated
remotely using the Company's MacroVision product.
    
 
   
    Although the  Pap  smear test  is  the  largest volume  cytology  test,  the
cytopathology  laboratory routinely conducts  other tests based  on samples from
numerous organs and areas of the body, all of which require precision microscopy
and careful  management of  data  to be  effectively implemented.  Although  the
Company  is not  currently developing any  products for  these applications, the
Company believes that its AcCell technology may be adapted for use in connection
with the analysis of these tests in a manner similar to that of Pap smear tests.
    
 
    THE TRACCELL 2000.   The Company has developed  a prototype of the  TracCell
2000  pre-screening, mapping and slide handling product designed to identify and
create a computerized  map of  empty space and  certain non-clinically  relevant
areas  on the slide and thereby reduce the amount of matter on the specimen that
must be reviewed by the cytotechnologist  using the AcCell Series 2000. Much  of
the  material contained in  a Pap smear  specimen is not  clinically relevant to
cervical cancer screening. In addition to human cells, a typical Pap smear slide
contains a certain amount of vacant space, blood,
 
                                       33
<PAGE>
   
mucus   and   other   non-clinically    relevant   material.   Currently,    the
cytotechnologist  is required  to review  all portions  of the  slide, including
those portions that  are not relevant  to diagnosis, because  there is no  basis
upon  which to distinguish such material until it is reviewed manually under the
microscope.
    
 
   
    The TracCell 2000 is designed to first evaluate whether a sample is properly
stained and  has  sufficient  material  to  be  statistically  significant.  The
TracCell  2000 then automatically  pre-screens the slide to  locate and create a
computerized map of empty space and certain non-clinically relevant material. In
tests conducted by the Company, it has been demonstrated that the TracCell  2000
can eliminate from 15% to 50% of the slide area to be reviewed. As a result, the
Company  believes that the  TracCell 2000 has  the potential to  reduce the time
needed to evaluate  specimens and allow  the cytotechnologist to  focus on  more
thoroughly evaluating potential abnormalities.
    
 
   
    The  TracCell 2000 is designed to be used before the slide is reviewed using
the AcCell 2001. A single TracCell 2000 is designed to support up to five AcCell
2001 instruments based on normal laboratory  usage. The TracCell 2000 creates  a
pre-screening pattern for the slide based on the computerized map, which is used
by  the AcCell  2001 to automatically  move the  slide to the  relevant area and
automatically focus the microscope during the cytotechnologist's review. If  the
cytotechnologist  wants  to  alter  the pre-screened  sequence,  he  or  she can
override  the  system  for  a  particular  slide.  Regardless  of  whether   the
cytotechnologist  chooses  to override  the prescribed  sequence, the  system is
designed to facilitate and document 100% review of the slide. The TracCell 2000,
if successfully developed and cleared by the FDA or other applicable  regulatory
authorities  for  marketing,  will  be  marketed  with  software  for  which the
laboratory will pay a software license fee each time a slide is reviewed.
    
 
    The Company  is  currently  testing  the TracCell  2000  with  the  goal  of
supporting  the filing of a 510(k) Notification by the end of 1996. There can be
no assurance that the  testing will be successfully  completed, that the  510(k)
Notification  will be submitted to the FDA on  a timely basis, if ever, that the
FDA or other applicable regulatory authorities  will clear the TracCell 2000  or
that  the  TracCell 2000  will be  successfully marketed.  See "Risk  Factors --
Uncertainty  of  Market  Acceptance  and  Initial  Investment  in  Cytopathology
Products" and "-- Government Regulation."
 
    THE  TRACCELL 3000.  The Company  is developing a second generation specimen
pre-screening and slide mapping product, the TracCell 3000, to further  automate
the  mapping  process.  The  TracCell  3000,  if  successfully  developed,  will
eliminate not only  empty space,  debris and  other material  eliminated by  the
TracCell  2000, but  will also eliminate  certain normal  cellular material. The
Company believes,  based  on preliminary  studies  it has  conducted,  that  the
technology  embodied in the TracCell 3000 may be capable of further reducing the
portion of the  specimen required to  be reviewed by  the cytotechnologist.  The
TracCell  3000 is being designed to  accommodate automated mapping of 500 slides
per eight hour period. Further testing and development and additional  resources
are   necessary  to  determine  whether  a  commercially  viable  TracCell  3000
instrument can be developed. Development of the TracCell 3000 is subject to  all
of the risks associated with the development of new products based on innovative
technologies  and  new  software,  including  unanticipated  technical  or other
problems  and  the  possible  insufficiency  of  the  funds  allocated  for  the
completion  of such development, which  could result in a  change in the design,
delay in  the development,  or abandonment  of such  products. There  can be  no
assurance that the Company will successfully develop the TracCell 3000, that the
TracCell  3000 will  be cleared or  approved for  marketing by the  FDA or other
applicable  regulatory  authorities,   or  that  the   TracCell  3000  will   be
successfully marketed. See "Risk Factors -- Uncertainty of Market Acceptance and
Initial Investment in Cytopathology Products" and "-- Government Regulation."
 
   
    CYTOPATHOLOGY  EDUCATIONAL AND TRAINING PRODUCTS.   The Company has recently
developed the  MacroVision  feature, a  specially  modified AcCell  product  for
on-screen specimen review. This system can also be used by teaching institutions
and  laboratories to provide  hands-on cytotechnology training  through a single
microscope. Cytotechnologists  are  required  by CLIA  to  attain  and  maintain
minimum  standards  of competence,  and cytology  laboratories are  charged with
ensuring that  their  cytology  professionals  meet  such  competency  standards
through  continuing training and  testing. Current training  and testing involve
the use  of  multiple  microscopes  or  specialized  microscopes  equipped  with
    
 
                                       34
<PAGE>
multiple  eyepieces which are  difficult to use.  Using the MacroVision feature,
the teacher or trainer can  display the specimen being  reviewed on one or  more
computer  monitors. The monitor can be viewed directly by the students or can be
linked with other  computers and  monitors to  provide remote  or even  off-site
viewing.  For  testing  purposes,  AccuMed  is  also  developing  a  glass slide
Proficiency Testing Station  that provides automated  scoring of the  screener's
locator and identification skills on user defined test slide sets.
 
   
    In   addition,  the  Company  is  developing  the  Relational  Cytopathology
Reference Guide (the  "Reference Guide"),  a library  of electronically  stored,
digitized  cell images.  The Reference  Guide may be  used in  training to allow
students to analyze typical and atypical specimens as slides are being reviewed.
In the clinical laboratory, the Reference  Guide is being designed to provide  a
reference  database to  assist the  cytotechnologist and  cytopathologist in Pap
smear analysis. Each of the Company's educational products is being designed  to
record  and document continuing education activity  to assist in compliance with
CLIA requirements.
    
 
  POTENTIAL ACQUISITION OF INTEREST IN ONCOMETRICS
 
   
    In August 1996, the Company entered into definitive agreements to acquire  a
two-thirds  equity interest in  Oncometrics for aggregate  consideration of $4.0
million in cash.
    
 
    Oncometrics was formed  in 1995 as  a wholly-owned subsidiary  of Xillix  to
complete  the development of an automated instrument  designed to be used in the
detection, diagnosis and prognosis of early-stage cancer by measuring the DNA in
cells on  microscope  slides.  Oncometrics  is  developing  a  proprietary  high
resolution image cytometer that uses a solid state microscope, a high resolution
digital  camera,  proprietary image  analysis software  and high  speed computer
processors to capture and analyze cell  images from a microscope slide that  has
been  stained using Oncometrics' proprietary  staining method. Prototypes of the
Oncometrics instrument have been developed  that are capable of isolating  small
variations  in cell nucleus DNA, which assists the cytotechnologist in detecting
lung cancer in  an early stage  of development. Because  the presence of  cancer
cells  can cause changes in  the nuclear DNA of normal  cells, in some cases the
Oncometrics instrument  can detect  cancer even  in the  absence of  cells  with
visibly detectable disease.
 
    Oncometrics has demonstrated the feasibility of its technology as it applies
to  the detection of early  cancer in lung mucus.  Oncometrics believes that its
technology may be potentially applied to other types of cancer, such as cervical
cancer.
 
   
    Oncometrics is currently testing several  prototypes of its instrument  with
scientists  and cancer  research institutions.  There can  be no  assurance that
Oncometrics or the Company will successfully develop this instrument for lung or
cervical or other  cancer applications  or, if developed,  that this  instrument
will  be  approved  for marketing  by  the  FDA or  other  applicable regulatory
authorities or  that it  will be  successfully marketed.  See "Risk  Factors  --
Delayed or Unsuccessful Product Development" and "-- Government Regulation."
    
 
   
    Of  the consideration, $2.0  million is to  be paid to  Xillix for currently
outstanding Oncometrics stock and $2.0 million  is to be paid to Oncometrics  in
consideration  for newly issued Oncometrics stock.  The Company expects to use a
portion of the net proceeds of the Offering to fund the Oncometrics Acquisition.
Consummation of  the transactions  with  Xillix and  Oncometrics is  subject  to
various  conditions, including  consummation of  the Offering,  the satisfactory
completion by the Company of a due diligence review with respect to intellectual
property matters  and  the  execution of  a  definitive  Shareholders  Agreement
pursuant  to  which Xillix  and the  Company will  provide operating  funding to
Oncometrics on a pro rata basis. The Company's portion of such operating funding
is estimated to be $1.0 million during the 24 months following the date of  this
Prospectus.  There can be no assurance that the transaction will be consummated.
See "Use of Proceeds."
    
 
                                       35
<PAGE>
  CYTOPATHOLOGY SALES AND MARKETING
 
   
    Pap  smear screening is performed in approximately 4,500 laboratories in the
United States.  The  Company  is  currently marketing  the  AcCell  Series  2000
workstations  to the clinical laboratory market, primarily in the United States.
In order  to  expand its  markets,  the  Company is  implementing  a  dual-track
marketing  strategy  pursuant to  which it  intends  to enter  into distribution
arrangements with  major market  participants,  as well  as establish  a  direct
marketing  group  to  support  the  marketing  activities  of  its  distribution
partners. The Company  intends to tailor  its marketing strategy  by region  and
country as appropriate to address significant differences among such markets.
    
 
    The  AcCell Series 2000  is distributed in the  Olympus Territory by Olympus
America pursuant to an exclusive agreement entered into in May 1996. The Company
currently has a two-person direct cytopathology  sales force and is planning  to
add additional sales personnel to support distributors of its products.
 
   
    Olympus  America  is  a leading  supplier  of precision  microscopes  to the
cytology market in the United States  and throughout the Olympus Territory.  The
Olympus  Agreement grants to Olympus  America exclusive third party distribution
rights to the AcCell Series 2000 and the TracCell 2000 in the Olympus  Territory
through  May  1999. These  products  are expected  to  be incorporated  with the
Olympus microscope and marketed under and  labeled with the Olympus America  and
AcCell  names. The Olympus Agreement permits the Company to conduct direct sales
efforts in the Olympus Territory and direct or indirect sales efforts throughout
the world. Olympus America  is required to purchase  specified minimum units  of
the  AcCell Series 2000 in  each year of the term,  although direct sales by the
Company in the  Olympus Territory can  be used to  satisfy the minimum  purchase
obligation.  Olympus America has a  right of first refusal  to distribute in the
Olympus  Territory  certain  additional  cytopathology  products  that  may   be
developed  by AccuMed. The Company's direct sales  staff will work in concert to
train the Olympus America sales team and support their efforts at industry trade
shows and conventions, and will be  compensated directly by Olympus America  for
providing training and installation support for the distributed products.
    
 
MICROBIOLOGY
 
   
    The Company develops, manufactures and markets IN VITRO diagnostic tests for
the  clinical  laboratory, veterinary  and  pharmaceutical markets.  The Company
offers the microbiology laboratory a variety of FDA-cleared products, under  the
trade  name Sensititre, for identifying bacteria suspected of causing infections
and measuring  the  susceptibility  of  such bacteria  to  different  types  and
concentrations  of antibiotics. AccuMed's microbiology products include a series
of disposable test kits and a  range of automated instruments. The Company  also
markets  alamarBlue, a  proprietary, non-toxic  indicator reagent  that measures
cell growth for IN VITRO  testing. The Company is  developing the KB Reader,  an
automated  instrument  designed  to read  the  results of  a  Kirby-Bauer method
susceptibility test. In conjunction with  RADCO, the Company is also  developing
the FluoreTone 48, a diagnostic microbiology test panel and an automated reading
instrument.   There  can  be  no  assurance  that  any  such  products  will  be
successfully developed,  that such  products  will be  cleared or  approved  for
marketing  by the FDA  or other applicable regulatory  authorities, or that such
products will  be  successfully  marketed.  See  "Risk  Factors  --  Delayed  or
Unsuccessful Product Development" and "-- Government Regulation."
    
 
  BACKGROUND
 
    MIC/ID  testing  by  hospitals and  laboratories  assists  physicians, other
health care professionals  and veterinarians in  determining the most  effective
course of treatment for bacterial infections. MIC/ID testing technology measures
the  ability  of  organisms  or  cells to  grow  in  different  combinations and
concentrations of  an antibiotic  or other  introduced substance.  By  measuring
growth,  MIC/ID  testing  products  can,  for  example,  provide  physicians and
veterinarians guidance in  determining which antibiotics  are most effective  in
treating a given case of bacterial infection.
 
   
    Current MIC/ID testing technology consists of (i) a variety of methodologies
employing  a plastic  panel with  a matrix  of testing  microwells and  (ii) the
Kirby-Bauer  disk  diffusion  method.  Panel  testing  technology  involves  the
placement  of a solution known as a "reagent" containing selected antibiotics in
a
    
 
                                       36
<PAGE>
   
matrix of  microwells and  adding to  each microwell  a broth  which contains  a
sample  of the patient's blood or other  fluid in which bacteria may be present.
After  an  incubation  period,  the  effectiveness  of  the  antibiotic  can  be
determined  by observing  chemical changes  to the  solution. By  constructing a
matrix of testing wells with specific antibiotics in increasing  concentrations,
it is possible to determine not only the effectiveness of a given antibiotic but
also  the minimum  required dosage.  Kirby-Bauer testing  involves placing paper
disks impregnated with a selected  antibiotic in a culture containing  bacterium
and  observing, after the incubation period,  whether the bacterium continues to
grow in  proximity to  the disk.  The results  of a  Kirby-Bauer test  determine
whether a given antibiotic is effective against the bacterium, but, unlike panel
testing, offer no information as to the minimum dosage required.
    
 
  MICROBIOLOGY PRODUCTS
 
   
    SENSITITRE.   Sensititre, which  was acquired by the  Company in 1995, first
began offering MIC/ID testing products over 15 years ago. Sensititre was one  of
the first companies to introduce a range of systems for MIC/ID testing utilizing
microwell  panel  technology. The  Sensititre  products incorporate  a  range of
accessories including substrate  strips, dosing heads,  broths, and test  panels
for  both susceptibility and identification  applications. The Sensititre panels
have significant advantages  over competitors, including  a two-year shelf  life
and  the ability to be  stored at room temperature.  The Sensititre product line
also  includes  four  automated  instruments,  each  of  which  uses  compatible
technologies,  and  allows customers  to  upgrade without  replacing  the entire
system. The  AutoReader-TM- is  a microprocessor-based  fluorimeter designed  to
automatically  and rapidly measure intensity  levels of fluorescence from MIC/ID
testing panels. ARIS-TM-  is a  fully automated panel  handling, incubating  and
reading   instrument  that   offers  robotic   processing  of   testing  plates.
SensiTouch-TM- is a device  that guides the user  through the manual reading  of
Sensititre susceptibility test panels and transmits the data to a host computer.
The   AutoInoculator-TM-   is  a   rapid   microprocessor-controlled  dispensing
instrument designed to automatically deliver the proper amount of the  patient's
specimen  to a  Sensititre test  panel. The  Company also  offers the Sensititre
Automated Microbiology System, which is  a sophisticated data management  system
that provides a wide range of data tracking and reporting capabilities.
    
 
   
    ALAMARBLUE.  The Company manufactures and markets alamarBlue, a proprietary,
non-toxic,  water-soluble  indicator reagent  that measures  cell growth  for IN
VITRO testing.  alamarBlue has  applications  in biological  research,  bacteria
testing,   toxicity  testing  for  consumer  products,  and  pharmaceutical  and
therapeutic research. For example, companies that produce consumer products such
as soaps,  shampoos, lotions  or cosmetics  can conduct  IN VITRO  cell  culture
toxicity tests in lieu of live animal testing. The Company has marketed a series
of  MIC/ID panel tests using alamarBlue under the trade name Alamar. The Company
is currently negotiating to  enter into an agreement  pursuant to which a  third
party would manufacture the Alamar microbiology products, other than alamarBlue,
although there can be no assurance that such an agreement can be reached.
    
 
   
    In  October 1995, the Company entered  into the Becton Agreement pursuant to
which Becton  has rights  in  and to  the  Company's alamarBlue  technology  and
related  trade secrets, know-how  and patent rights  (the "Licensed Technology")
for the production  and sale  of disposable anti-microbial  testing panels.  The
worldwide  license  is  exclusive  to Becton  for  certain  applications  in the
microbiology market; however,  the license  permits the Company  to continue  to
exploit  the  Licensed  Technology,  subject  to  certain  restrictions  on  the
Company's ability  to  sublicense  the  Licensed  Technology  or  to  engage  in
significant  transactions  with  substantial competitors  of  Becton.  Becton is
obligated to pay  royalties on  net sales of  any product  which encompasses  or
incorporates  the  Licensed  Technology  for  five  years  following  the  first
commercial use of  the Licensed  Technology, subject to  certain conditions  and
restrictions,  and Becton has  paid the Company  a total of  $3.5 million, which
includes  $500,000  creditable  against  future  royalties.  To  the   Company's
knowledge,  as of the date  of this Prospectus, Becton  has not produced or sold
any products incorporating the Licensed Technology. See "Management's Discussion
and Analysis of Financial Condition and Results of Operations."
    
 
   
    KB READER.    In February  1996,  the Company  entered  into a  license  and
distribution  agreement with  Biokit, S.A., Barcelona,  Spain, to  develop a low
cost   KB    Reader    designed    to    read    automatically    the    results
    
 
                                       37
<PAGE>
   
of  a  Kirby-Bauer  method  susceptibility  test.  Currently,  most laboratories
interpret the results of a disk  diffusion test visually and manually enter  the
test  result.  The  Company  has licensed  from  Biokit,  S.A.  certain software
algorithms that are intended to be integrated into the hardware being  developed
by  the Company. The Company has developed  a prototype KB Reader and expects to
begin clinical trials by the end of 1996. The Company has an exclusive worldwide
license to manufacture and  market the KB Reader,  except that Biokit, S.A.  has
exclusive  rights to market  the KB Reader in  Italy and may  also market the KB
Reader in any country  in which the  Company does not at  such time directly  or
indirectly  market the KB Reader. Development of the KB Reader is subject to all
of the risks associated with the development of new products based on innovative
technologies and  new  software,  including  unanticipated  technical  or  other
problems  and  the  possible  insufficiency  of  the  funds  allocated  for  the
completion of such development,  which could result in  a change in the  design,
delay  in the development, or abandonment  of such products. Consequently, there
can be no assurance that the KB Reader will be successfully developed, that  the
KB  Reader  will  be  cleared  for marketing  by  the  FDA  or  other applicable
regulatory authorities or that the KB Reader will be successfully marketed.  See
"Risk Factors -- Delayed or Unsuccessful Product Development" and "-- Government
Regulation."
    
 
  POTENTIAL ACQUISITION OF RADCO
 
   
    In  March  1996, the  Company  and certain  investors  formed RADCO  for the
purpose of  developing a  diagnostic microbiology  test panel  and an  automated
reading instrument. The RADCO automated product would allow AccuMed to provide a
single  product to both  low-end and high-end volume  users. RADCO was initially
capitalized through the private placements  of units consisting of an  aggregate
of  400,000 shares of RADCO common stock (the "RADCO Stock"), the RADCO Notes in
the aggregate principal amount of  approximately $1.2 million (bearing  interest
at  a rate of  10% per annum) and  warrants to purchase  an aggregate of 687,500
shares of AccuMed Common Stock with  a weighted average exercise price of  $3.73
per  share.  In consideration  for the  issuance of  such warrants,  the Company
received 10% of the outstanding RADCO Stock. In August 1996, the Company entered
into a definitive agreement to acquire the outstanding RADCO Stock not owned  by
it and to retire the outstanding RADCO Notes at an aggregate cost to the Company
of  approximately $1.4 million in cash. The  Company expects to use a portion of
the net proceeds of the Offering to fund the RADCO Acquisition. Consummation  of
the  transaction is subject to various conditions, including consummation of the
Offering. There can be  no assurance that the  transaction will be  consummated.
Development  of the  FluoreTone 48 diagnostic  test panel  and automated reading
instrument is subject to all of the risks associated with the development of new
products  based  on   innovative  technologies  and   new  software,   including
unanticipated  technical or other problems and the possible insufficiency of the
funds allocated for the completion of such development, which could result in  a
change in the design, delay in the development, or abandonment of such products.
Consequently,  there  can  be  no  assurance  that  the  FluoreTone  48  will be
successfully developed, that the FluoreTone 48  will be cleared or approved  for
marketing  by the  FDA or  other applicable  regulatory authorities  or that the
FluoreTone 48 will  be successfully marketed.  See "Risk Factors  -- Delayed  or
Unsuccessful Product Development" and "-- Government Regulation."
    
 
  MICROBIOLOGY SALES AND MARKETING
 
   
    The  Company's  Sensititre  products  are  marketed  in  the pharmaceutical,
veterinary laboratory and  clinical/hospital reference  laboratory markets.  The
Company  markets alamarBlue to industrial  and research customers, including the
biotechnology industry. The  Company markets  its microbiology  products in  the
United  States through a seven-person direct  sales staff and in certain foreign
countries through  exclusive  diagnostic manufacturers  and  distributors.  Most
sales  to the  veterinary market are  through direct sales.  alamarBlue is being
marketed by  the  Company,  primarily  to  industrial  and  research  customers,
directly through advertising and trade shows.
    
 
COMPETITION
 
   
    The  Company believes that  the principal competitive  factors in the market
for both  cytopathology  and  microbiology products  include  functionality  and
product features, effectiveness of the product in standard medical practice, the
cost  of  the  product  to  the  laboratory  and  the  demonstrated cost/benefit
    
 
                                       38
<PAGE>
   
justification for purchasing new products. The Company believes that it is  also
important  to provide products that enhance  and assist standard practice rather
than products that require completely new practices.
    
 
   
    The Company's AcCell Series 2000 currently  faces and the TracCell 2000,  if
successfully  developed and  cleared for  marketing, will  face competition from
companies that  have  developed or  may  be developing  competing  systems.  The
Company  believes that many of the  Company's existing and potential competitors
possess substantially  greater  financial, marketing,  sales,  distribution  and
technical  resources  than  the Company,  and  more experience  in  research and
development, clinical trials, regulatory  matters, manufacturing and  marketing.
The  Company is aware of two companies  that currently market imaging systems to
re-examine or rescreen conventional Pap smear specimens previously diagnosed  as
negative  as  well  as  two  companies  that  are  developing  devices  for  the
preparation and analysis of Pap smear slides. The Company is aware that at least
one such company has submitted an imaging  system for use as a primary means  of
screening  Pap smear slides  under a PMA application.  Another company markets a
manual rescreening test claimed to detect the presence of cervical cancer  using
reagents  to  detect  certain RNA/DNA  hybrid  cells. If  any  company currently
marketing rescreening products receives FDA clearance or approval for use of its
product as a  primary screening system  to replace or  work in conjunction  with
conventional  Pap smear screening or if automated analysis systems are developed
and receive  FDA  clearance or  approval,  the  use of  conventional  Pap  smear
screening  could be substantially affected and the Company's business, financial
condition and results of operations would be materially adversely affected.
    
 
    The  market  for   the  Company's  current   and,  if  developed,   proposed
microbiology  products  is highly  competitive,  and the  Company  competes with
numerous well-established foreign and domestic companies, many of which  possess
substantially  greater  financial,  technical,  marketing,  personnel  and other
resources than the Company and have  established reputations for success in  the
development,  sale and  service of manual  and/or automated  IN VITRO diagnostic
testing products. A  significant portion  of the  MIC/ID testing  market in  the
United  States is controlled by MicroScan  and bioMerieux Vitek. These companies
market a range of medically related products and have resources far greater than
those of the Company.  Difco has been issued  a U.S. patent covering  technology
related  to the alamarBlue  technology covered in one  of the Company's patents.
There can be no assurance that Difco, which has substantially greater  resources
and  experience in research,  development, manufacturing and  marketing than the
Company, will not  use its  patented technology  to develop  products that  will
compete directly with the Company's microbiology products.
 
   
    The   medical  diagnostics  industry  is   characterized  by  rapid  product
development and technological advances. The  Company expects its competitors  to
continue  to  attempt to  improve the  design and  performance of  their current
products and  to  introduce  new  systems and  processes  with  improved  price/
performance  characteristics. There can be  no assurance that other technologies
or products  that are  functionally similar  to  those of  the Company  are  not
currently available or under development, or that other companies with expertise
and  resources  that  would encourage  them  to  attempt to  develop  and market
competitive products will not  develop new products  that compete directly  with
the  Company's products.  The Company's products  could be  rendered obsolete or
uneconomical by the  introduction and market  acceptance of competing  products,
technological  advances of the Company's current or potential competitors, or by
other approaches. There can  be no assurance  that the Company  will be able  to
compete  successfully against current or future competitors or that competition,
including the development and commercialization of new products and  technology,
will  not have  a material adverse  effect on the  Company's business, financial
condition and results of operations.
    
 
MANUFACTURING
 
   
    The Company assembles and  tests its cytopathology  products at its  Chicago
manufacturing  facility. The Company's microbiology products are manufactured at
the Company's GMP-approved  manufacturing facility  in England.  The Company  is
currently  seeking to enter  into an agreement  pursuant to which  a third party
would  manufacture  the  Company's  Alamar  microbiology  products,  other  than
    
 
                                       39
<PAGE>
   
alamarBlue.  However, there can  be no assurance  that such an  agreement can be
reached. If  such an  agreement is  not reached,  the Company  intends to  cease
manufacturing  such  products.  The  Company  believes  that  it  has sufficient
manufacturing capacity  to  meet  production requirements  for  the  foreseeable
future. Product components are purchased or are custom fabricated by third party
vendors.  The Company has purchased and modified the stage-control mouse for use
with  the  AcCell  Series  2000  but  is  currently  developing  a   proprietary
stage-control mouse which it expects to manufacture along with the AcCell Series
2000. The Company has only recently begun to scale up its manufacturing capacity
for  the  AcCell  Series 2000.  The  Company  is also  currently  developing the
manufacturing processes for the  TracCell 2000. There can  be no assurance  that
the Company will be able to sell sufficient numbers of systems or develop volume
manufacturing  processes that will lead to the cost-effective manufacture of the
AcCell Series 2000  or the TracCell  2000. See "Risk  Factors -- Uncertainty  of
Profitable Cytopathology Manufacturing."
    
 
   
    Certain  key components and  raw materials used in  the manufacturing of the
Company's products are currently provided by single-source vendors. Although the
Company believes that alternative sources for such components and raw  materials
are  available, any  supply interruption  in a  single-sourced component  or raw
material would  have a  material  adverse effect  on  the Company's  ability  to
manufacture  products until a new source of  supply were qualified. There can be
no assurance  that the  Company  would be  successful in  qualifying  additional
sources  on a timely basis, if ever,  which would have a material adverse effect
on the Company's  business, financial  condition and results  of operations.  In
addition,  an uncorrected impurity or a  supplier's variation in a raw material,
either unknown to the Company  or incompatible with the Company's  manufacturing
process,  could  have a  material  adverse effect  on  the Company's  ability to
manufacture products. See "Risk Factors -- Dependence on Suppliers."
    
 
RESEARCH AND DEVELOPMENT
 
   
    The Company's research  and development efforts  are focused on  introducing
new  products  as well  as  enhancement of  its  existing products.  The Company
believes that  a commitment  to  research and  development  is critical  to  its
ability  to achieve its strategic plan.  During the fiscal years ended September
30, 1994 and  1995, the three  month transition period  ended December 31,  1995
(during  which  the Company  had suspended  research and  development activities
prior to consummation of the Merger) and the six months ended June 30, 1996, the
amounts recorded  for research  and development  were $580,000,  $387,000,  $4.0
million  and $4.8 million,  respectively. Of the amounts  recorded for the three
month transition period ended  December 31, 1995 and  the six months ended  June
30,  1996,  $4.0  million  and  $3.5  million,  respectively,  reflected certain
significant non-cash charges  against operations representing  the write-off  of
in-process  research and development acquired in connection with the Merger. See
"Management's Discussion  and Analysis  of Financial  Condition and  Results  of
Operations."
    
 
   
INTELLECTUAL PROPERTY
    
 
   
    The  Company  relies on  a combination  of patents,  licensing arrangements,
trade names, trademarks, trade secrets, know-how and proprietary technology  and
policies  and procedures for maintaining the  secrecy of trade secrets, know-how
and proprietary  technology in  order  to secure  and protect  its  intellectual
property  rights.  The Company  has  filed or  been  assigned eight  U.S. patent
applications covering certain  aspects of its  cytopathology products, and  four
U.S.  patent  applications, one  Japanese  patent application  and  one Canadian
patent application  related  to its  microbiology  products. The  Company  holds
certain  licenses on  several U.S.  and foreign  patents and  other intellectual
property rights regarding aspects of  the technology embodied in the  Sensititre
product  line and is the licensee of certain automated cell analysis technology.
The Company holds a U.S. patent and has  received a notice of intent to grant  a
related European patent with respect to a portion of the alamarBlue microbiology
technology.
    
 
   
    None of the Company's patent applications has been granted as of the date of
this  Prospectus, and there can be no assurance that any such patent application
will result in an issued patent. The Company may, in the future, file additional
patent applications; however, there can be no assurance that the Company will be
successful in obtaining approval of any future patent applications it files with
respect to
    
 
                                       40
<PAGE>
   
its technologies. In addition,  since patent applications  in the United  States
are  maintained  in  secrecy  until patents  issue,  and  since  publications of
discoveries in the  scientific or patent  literature tend to  lag behind  actual
discoveries by several months, the Company cannot be certain that the Company or
other  relevant patent  application filer  was the  first creator  of inventions
covered by pending patent  applications or that such  persons were the first  to
file patent applications for such inventions.
    
 
   
    There  also can  be no assurance  that any patents,  patent applications and
patent licenses will  adequately cover the  Company's technologies.  Protections
relating  to portions of such technologies  may be challenged or circumvented by
competitors, and other portions may be in the public domain or protectable  only
under state trade secret laws.
    
 
   
    The  Company  owns  two  U.S.  trademark  registrations  for  the  trademark
"Sensititre," has filed a U.S. trademark application for the trademark  "AcCell"
and  is currently  preparing three more  trademark applications  for filing. The
Company may  file additional  U.S.  and foreign  trademark applications  in  the
future.  However,  no  trademark  registrations have  yet  been  granted  to the
Company, and  there can  be no  assurance that  any such  registrations will  be
granted.  In addition, there can be no  assurance that third parties have not or
will not adopt or register marks that  are the same or substantially similar  to
those  of the Company,  or that such third  parties will not  be entitled to use
such marks to the exclusion of the Company. Selecting new trademarks to  resolve
such  situations could involve significant costs, including the loss of goodwill
already gained by the marks previously used.
    
 
   
    The Company  relies  for  protection  of its  trade  secrets,  know-how  and
proprietary  technology on nondisclosure and confidentiality agreements with its
employees, consultants, distributors, suppliers, researchers and advisors. There
can be no assurance that such agreements will provide meaningful protection  for
the  Company's trade secrets, know-how or proprietary technology in the event of
any unauthorized use or disclosure of such information. In addition, others  may
obtain  access to, or independently develop, technologies or know-how similar to
that of the Company.
    
 
   
    There can be no assurance  that the Company's patents, patent  applications,
patent licenses, trademarks and trade secret protections will adequately protect
the  Company from potential  infringement or misappropriation  by third parties.
Historically, the Company has  been required to  undertake costly litigation  to
enforce  its intellectual property rights. Although the Company is not currently
aware of any  potential infringement, future  litigation by the  Company may  be
necessary to enforce its patent rights, as well as to protect its trade secrets,
know-how  and proprietary technology, or to  determine the scope and validity of
the  proprietary  rights  of  others.  Any  such  litigation  could  result   in
substantial cost to and diversion of effort by the Company.
    
 
   
    The  Company's success will also depend on its ability to avoid infringement
of patent or other proprietary rights of  others. The Company is not aware  that
it  is  infringing  any  such rights  of  a  third  party, nor  is  it  aware of
proprietary rights of others for which it  will be required to obtain a  license
in  order to develop its  products. However, there can  be no assurance that the
Company is not infringing the proprietary rights of others, or that the  Company
will not be required to defend itself against claimed infringement of the rights
of  others.  Adverse determinations  in any  such  litigation could  subject the
Company to significant liability to third parties, could require the Company  to
seek   licenses  from  third   parties  and  could   prevent  the  Company  from
manufacturing, selling or using certain of its products or technologies, any  of
which could have a material adverse effect on the Company.
    
 
GOVERNMENT REGULATION
 
   
    The  Company's products and  manufacturing processes are  regulated by state
and federal authorities, including the FDA and comparable authorities in certain
states and  other  countries.  Failure to  comply  with  the FD&C  Act  and  any
applicable  regulatory requirements can result in, among other things, civil and
criminal fines, product recalls, detentions, seizures, injunctions and  criminal
prosecutions.
    
 
    United States regulatory requirements promulgated under the FD&C Act provide
that  many of the Company's  products may not be  shipped in interstate commerce
without prior authorization from the
 
                                       41
<PAGE>
   
FDA. Such authorization is based on a review by the FDA of the product's  safety
and  effectiveness for its  intended uses. Medical devices  may be authorized by
the FDA  for  marketing  in  the  United States  either  pursuant  to  a  510(k)
Notification or a PMA. The process of obtaining clearances or approvals from the
FDA  and other applicable regulatory authorities can be expensive, uncertain and
time consuming,  frequently requiring  several years  from the  commencement  of
clinical trials or submission of data to the receipt of regulatory approval.
    
 
   
    A  510(k) Notification,  among other things,  requires an  applicant to show
that its  products  are  "substantially  equivalent"  in  terms  of  safety  and
effectiveness  to existing products that are currently permitted to be marketed.
An applicant  is permitted  to begin  marketing a  product as  to which  it  has
submitted a 510(k) Notification at such time as the FDA issues a written finding
of  substantial equivalence. Requests  for additional information  may delay the
market introduction  of certain  of an  applicant's products  and, in  practice,
initial clearance of products often takes substantially longer than the FDA pre-
market notification review period of 90 days.
    
 
   
    A  PMA consists of  the submission to  the FDA of  information sufficient to
establish independently that  a device is  safe and effective  for its  intended
use.  A  PMA must  be  supported by  extensive  data, including  preclinical and
clinical trial data,  as well as  extensive literature to  prove the safety  and
effectiveness of the device. By statute, the FDA is required to respond to a PMA
within  180 days from the date of  its submission; however, the approval process
usually takes substantially longer, often as  long as several years. During  the
review   period,  the  FDA  may  conduct  extensive  reviews  of  the  Company's
facilities,  deliver   multiple   requests  for   additional   information   and
clarifications and convene advisory panels to assist in its determination.
    
 
    FDA   clearances  and   approvals,  if  granted,   may  include  significant
limitations on  the intended  uses for  which  a product  may be  marketed.  FDA
enforcement  policy  strictly prohibits  the  promotion of  cleared  or approved
medical devices  for  non-approved or  "off-label"  uses. In  addition,  product
clearances  or approvals may be withdrawn  for failure to comply with regulatory
standards or the occurrence of unforeseen problems following initial marketing.
 
   
    Under current interpretation  of FDA  regulations, marketing  of the  AcCell
Series  2000 in the  United States does  not require FDA  clearance or approval.
Marketing of  the TracCell  2000 in  the United  States, however,  will  require
pre-marketing  clearance or  approval by the  FDA. The  Company anticipates that
such clearance  will  be  sought through  submission  to  the FDA  of  a  510(k)
Notification rather than a PMA. The Company is currently conducting the required
testing  of the TracCell 2000  and expects to submit  a 510(k) Notification with
respect to the TracCell 2000 by the end of 1996. There can be no assurance  that
the  Company will successfully complete the necessary testing on a timely basis,
if ever, that a 510(k)  Notification with respect to  the TracCell 2000 will  be
submitted to the FDA by the end of 1996, if ever, or that the FDA will clear the
TracCell  2000 for marketing in the United States on a timely basis, if ever. It
is also possible that the FDA could  require a PMA for the TracCell 2000,  which
would  result in significant  delays in bringing  the TracCell 2000  to the U.S.
market and  could have  a material  adverse effect  on the  Company's  business,
financial condition and results of operations.
    
 
   
    Under  current interpretation of FDA regulations, marketing of the Company's
MIC/ID microbiology products in the United States requires FDA clearance through
the 510(k) Notification process.  With respect to  the Company's MIC/ID  testing
products,  510(k) Notifications must  be filed and cleared  with respect to each
antibiotic  used.  The  Company  may  submit  applications  to  add   individual
antibiotics  to those previously cleared as  the market warrants. However, there
can be  no  assurance that  clearances  will continue  to  be obtained  or  that
obtained clearances will not be withdrawn.
    
 
   
    At  the current time, alamarBlue  is marketed for use  in the industrial and
research markets and therefore does not  require FDA clearance or approval.  The
FDA  could change  its interpretation  of the  regulations and  require a 510(k)
Notification or PMA submission which, if pursued, may not be cleared or approved
or, if approved,  may contain  certain significant limitations  on the  intended
uses for which the product is marketed.
    
 
                                       42
<PAGE>
   
    Marketing  in the United States of  the Company's products under development
may require additional FDA clearances  or approvals. For example, the  Company's
proposed  automated  pre-screening, specimen  mapping workstation,  the TracCell
3000, if developed, may not  be sold in the United  States unless and until  the
Company  has  obtained  FDA  clearance  or  approval,  either  through  a 510(k)
Notification or  a PMA.  In addition,  marketing of  the Company's  proposed  KB
Reader  and other  proposed microbiology  products, if  developed, is  likely to
require FDA clearance  through 510(k)  Notifications. The  Company is  currently
conducting  research and development  with respect to such  products and has not
yet begun clinical trials. There can be no assurance that any such products will
be developed or, if  developed, that such products  will be cleared or  approved
for  marketing by the FDA or other applicable regulatory authorities or, if such
clearance or approval is received, that  such clearance or approval will not  be
withdrawn. See "-- Cytopathology -- Cytopathology Products" and "-- Microbiology
- -- Microbiology Products."
    
 
   
    Sales of medical devices outside of the United States are subject to foreign
regulatory  requirements that vary from country to country. The time required to
obtain approval by a foreign country may be longer or shorter than that required
for FDA clearance or approval, and the requirements may differ. Export sales  of
certain  devices  that have  not received  FDA  marketing clearance  or approval
generally are subject to both FDA export permit requirements and, in some cases,
general U.S. export  regulations. In order  to obtain a  FDA export permit,  the
Company  may be required to provide the  FDA with documentation from the medical
device regulatory authority of the country in which the purchaser is located. No
assurance can be given  that foreign regulatory approvals  will be granted on  a
timely  basis,  if ever,  or  that the  Company will  not  be required  to incur
significant costs in obtaining or maintaining its foreign regulatory approvals.
    
 
   
    The Company  intends  to  seek  ISO  9001  qualification,  an  international
manufacturing  quality standard, and to seek the "CE" mark for the AcCell Series
2000 and proposed  products. The  CE mark is  recognized by  countries that  are
members  of  the European  Union and  the European  Free Trade  Association and,
effective in 1998, will be required to be affixed to all medical devices sold in
the European  Union. The  AcCell Series  2000  is expected  to be  certified  as
complying with CE mark requirements upon completion of the CE mark qualification
process  which is underway; however, no assurance  can be given that the Company
will obtain the CE mark for the  AcCell Series 2000 or any proposed products  or
satisfy  ISO 9001 standards, or that any product that the Company may develop or
commercialize will  obtain  the  CE  mark or  will  obtain  any  other  required
regulatory clearance or approval on a timely basis, if ever.
    
 
   
    The  Company  is subject  to  certain FDA  registration,  record-keeping and
reporting requirements, and  certain of the  Company's manufacturing  facilities
are  obligated to  follow FDA  GMP regulations and  are subject  to periodic FDA
inspection. Any failure to comply with GMP regulations or any other FDA or other
govermment regulations could  have a  material adverse effect  on the  Company's
business, financial condition and results of operations.
    
 
   
    In  July 1996, the Company received from  the FDA a warning letter regarding
certain procedures used in connection  with the manufacture of its  microbiology
products  at the Sensititre facility in the  United Kingdom. In such letter, the
FDA stated that the Company manufactured  sterile products at such facility  and
was  not  in compliance  with  GMP regulations  relating  to the  manufacture of
sterile products. On August 7, 1996, the Company submitted a written response to
the FDA asserting that the products manufactured at the Sensititre facility  are
not sterile. There can be no assurance, however, that the Company will not incur
material  costs to comply with FDA regulations,  that the FDA will not institute
proceedings against  the Company  or  that such  proceedings  would not  have  a
material  adverse  effect on  the  Company's business,  financial  condition and
results of operations.
    
 
    Federal, state and foreign regulations regarding the manufacture and sale of
healthcare products and  diagnostic devices  are subject to  future change.  The
Company  cannot predict what material impact, if any, such changes might have on
its business. Future changes in regulations or enforcement policies could impose
more  stringent  requirements  on  the  Company,  compliance  with  which  could
adversely  affect  the  Company's  business.  Such  changes  may  relax  certain
requirements, which could prove
 
                                       43
<PAGE>
   
beneficial to the Company's competitors and thus adversely affect the  Company's
business.  In addition, regulations  of the FDA,  including GMP regulations, and
state and  foreign  laws  and  regulations,  depend  heavily  on  administrative
interpretations,  and there can be no assurance that future interpretations made
by the FDA, or other  regulatory authorities, with possible retroactive  effect,
will not adversely affect the Company. See "Risk Factors -- Technological Change
and Competition."
    
 
    In  addition to the  regulations directly pertaining to  the Company and its
products, many of the Company's existing and potential customers are subject  to
extensive  regulation  and  governmental oversight.  Regulatory  changes  in the
healthcare  industry  that  adversely  affect  the  business  of  the  Company's
customers  could  have  a material  adverse  effect on  the  Company's business,
financial condition and results of operations.
 
   
    There can be no assurance that the Company will be able to obtain  necessary
regulatory  approvals or clearances in the United States or internationally on a
timely basis, if ever.  Delays in the  receipt of, or  failure to receive,  such
approvals   or  clearances,  the  loss   of  previously  received  approvals  or
clearances, or failure to comply with existing or future regulatory requirements
would have  a  material adverse  effect  on the  Company's  business,  financial
condition and results of operations.
    
 
EMPLOYEES
 
   
    As  of August 27, 1996, the Company had a total of 85 employees, of whom two
are part-time  employees,  in  the  following departments:  19  in  general  and
administrative,  13  in  sales and  marketing,  33  in manufacturing  and  20 in
research and development. The Company considers its relations with its employees
to be good.
    
 
FACILITIES
 
    The Company currently leases (i) a  5,088 square foot facility at 900  North
Franklin  Street, Chicago, Illinois, pursuant to  a lease expiring September 30,
2004, and (ii)  an additional 3,110  square foot facility  located at 920  North
Franklin  Street, Chicago, Illinois, pursuant to  a lease expiring September 30,
2004, each subject to  renewal by the Company.  The Company's executive  offices
were  relocated  to  the  900  North  Franklin  Street  facility  in  July 1996.
Collectively, the Company's Chicago, Illinois facilities also house its research
and development facilities, an engineering laboratory and cytopathology  product
assembly facilities.
 
   
    The  Company also  leases a 10,980  square foot facility  in Westlake, Ohio,
pursuant to a five year lease expiring  April 1, 2000 which is renewable by  the
Company.  Sensititre  leases an  18,000  square foot  microbiology manufacturing
facility in East Grinstead, West Sussex,  England, pursuant to a lease  expiring
in 2009.
    
 
   
    The Company believes that its facilities are adequate for its proposed needs
through  1996 and that additional  suitable space is likely  to be available, if
required.
    
 
LEGAL PROCEEDINGS
 
    The Company is not currently a party  to any material litigation and is  not
aware  of any  pending or threatened  litigation against the  Company that could
have a material adverse effect upon the Company's business, operating results or
financial condition.
 
                                       44
<PAGE>
                                   MANAGEMENT
 
EXECUTIVE OFFICERS, KEY EMPLOYEES AND DIRECTORS
 
   
    The executive officers, key employees and directors of the Company and their
ages are as follows:
    
 
   
<TABLE>
<CAPTION>
                    NAME                          AGE                               POSITION
- ---------------------------------------------  ---------  ------------------------------------------------------------
<S>                                            <C>        <C>
Peter P. Gombrich............................     58      Chairman of the Board, Chief Executive Officer and President
Norman J. Pressman, Ph.D.....................     47      Senior Vice President of AccuMed and President,
                                                           Cytopathology Division
Michael D. Burke.............................     46      Senior Vice President of AccuMed and President, Microbiology
                                                           Division
Mark L. Santor...............................     43      Chief Financial Officer
Richard A. Domanik, Ph.D.....................     49      Senior Vice President
Dawn H. Grohs................................     54      Senior Vice President, Cytopathology Division
John H. Abeles, M.D..........................     51      Director
Harold S. Blue...............................     35      Director
Jack H. Halperin, Esq. (1)...................     50      Director
Paul F. Lavallee (1).........................     56      Director
Joseph W. Plandowski.........................     55      Director
Leonard M. Schiller, Esq. (1)................     54      Director
</TABLE>
    
 
- ------------------------
(1)  Member of the Audit Committee and Compensation Committee.
 
EXECUTIVE OFFICERS
 
    PETER  P. GOMBRICH.   Mr. Gombrich served as  Acting Chief Executive Officer
and a  director  of  the Company  from  the  date of  execution  of  the  Merger
Agreement, April 21, 1995, until consummation of the Merger on December 29, 1995
(the "Merger Date"), at which time he became Chairman of the Board of Directors,
Chief  Executive Officer  and President. Mr.  Gombrich founded  AccuMed, Inc. in
February 1994, and,  from then  until the Merger  Date, Mr.  Gombrich served  as
Chairman,  President and Chief  Executive Officer of  AccuMed, Inc. Mr. Gombrich
was a consultant in  the cytology and microbiology  industries from August  1990
until  forming AccuMed, Inc., serving companies including Accuron Corporation, a
designer of automated Pap smear screening systems. From July 1985 until November
1990, Mr. Gombrich  was the President  and Chief Executive  Officer of  CliniCom
Incorporated,  a bedside clinical information  systems company which he founded.
From 1982 until 1985, Mr. Gombrich was Executive Vice President of the  ventures
group  of ADC  Telecommunications. From  January 1980  until February  1982, Mr.
Gombrich was President of  the pacemaker division of  St. Jude Medical, Inc.,  a
company  that he  co-founded in 1976  and of  which he served  as Executive Vice
President from July 1976 to January 1980. Mr. Gombrich has more than 27 years of
experience in  the  healthcare industry.  Mr.  Gombrich  has a  B.S.  degree  in
electrical engineering and a M.B.A. degree from the University of Denver.
 
   
    NORMAN  J. PRESSMAN, PH.D.  Dr. Pressman has been a Senior Vice President of
AccuMed and President of the  Company's Cytopathology Division since July  1996.
From  July  1993  until  joining  the  Company,  Dr.  Pressman  was  Manager for
Biotechnology Development,  Strategic  Business  Development  Group  of  Olympus
America,  the exclusive distributor of the  Company's AcCell Series 2000 and the
TracCell 2000 in  the Olympus Territory.  Between July and  September 1989,  Dr.
Pressman  was engaged  in the formation  of Cell Systems  International, Inc., a
consulting firm in biomedical specimen  collection, processing and analysis,  of
which  he served as President from September  1989 until July 1993. Dr. Pressman
was the lead research scientist in  the Cytometry and Histometry program of  the
Central Research and Development Department at E.I. du Pont de Nemours & Company
from  December 1986 until July 1989. From September 1976 until December 1986, he
was an Assistant Professor (Pathology and
    
 
                                       45
<PAGE>
Engineering) at The Johns Hopkins University School of Medicine and Head of  the
Quantitative   Cytopathology   Laboratories   at  The   Johns   Hopkins  Medical
Institutions. Dr.  Pressman has  a B.S.  degree in  electrical engineering  from
Columbia  University,  a  M.S. degree  in  systems  engineering and  a  Ph.D. in
biomedical engineering from the University of Pennsylvania.
 
    MICHAEL D. BURKE.  Mr. Burke has been a Senior Vice President of AccuMed and
President of the Company's Microbiology Division since the Merger Date. From May
1995 until the Merger Date, Mr. Burke was a Senior Vice President and  President
of  the Microbiology  Division of  AccuMed, Inc.  From April  1992 until joining
AccuMed, Inc., Mr. Burke was Vice President -- Sales and Distribution, and  from
November  1982 until  April 1992  was Vice  President --  Operations, for Picker
International, Inc., a diagnostic imaging  manufacturer and supplier. Mr.  Burke
has a B.A. degree in political science from Knox College.
 
   
    MARK L. SANTOR.   Mr. Santor has been Chief Financial Officer of the Company
since  June 1991 and Secretary  since November 1994. Mr.  Santor has also served
the Company as Vice President, Finance  and Operations from November 1992  until
June  1996, and as Assistant  Secretary from May 1994  until November 1994. From
July 1989  until joining  the  Company, Mr.  Santor  served as  Vice  President,
Finance  of Oncotech, Inc., a medical  diagnostic company. From November 1987 to
June 1989, he served  as Director of  Finance of M.P.D.I.,  Inc., a provider  of
magnetic  resonance image scanning  services and related  software products. Mr.
Santor has a M.S. degree in materials engineering from M.I.T. and a M.B.A degree
from the Wharton School of Business. Mr. Santor's employment with the Company is
scheduled to terminate on August 30, 1996. Pursuant to a letter agreement  dated
August  19, 1996, Mr.  Santor will serve  as a consultant  to the Company during
September 1996 in order  to facilitate the transition  to a new Chief  Financial
Officer.
    
 
KEY EMPLOYEES
 
   
    RICHARD  A. DOMANIK, PH.D.   Dr. Domanik  has been Senior  Vice President of
Technology of the Company  since May 1996 and  was Vice President of  Technology
from the Merger Date until May 1996. From August 1994 until the Merger Date, Dr.
Domanik  was Vice President of Engineering of AccuMed, Inc. From June 1979 until
joining AccuMed,  Inc.,  Dr.  Domanik  served  Abbott  Laboratories  in  several
positions relating to research and development of healthcare products, including
Laboratory  Manager and Research and Development Manager. Dr. Domanik has a B.S.
degree in  chemistry  from  Ripon  College and  a  Ph.D.  in  biochemistry  from
Northwestern University.
    
 
    DAWN  H. GROHS.  Ms.  Grohs has been Senior  Vice President of the Company's
Cytopathology Division since May 1996 and served as Vice President --  Corporate
Development  of the Company's Cytopathology Division  from the Merger Date until
May 1996. From March 1994 until the  Merger Date, Ms. Grohs was a consultant  to
AccuMed,  Inc. From 1983 until  August 1995, Ms. Grohs  was President of The Med
Companies, a healthcare business development management company. Ms. Grohs has a
M.S. degree in mathematics from Memphis State University.
 
DIRECTORS
 
    JOHN H. ABELES, M.D.   Dr. Abeles has been a  director of the Company  since
October 1988. Since March 1996, Dr. Abeles has been the President and a director
of  Health Care Acquisition Corp., a  special purpose acquisition company. Since
1992, Dr. Abeles has also been a general partner of Northlea Partners, Ltd.,  an
investment and venture capital partnership. Since 1980, Dr. Abeles has also been
the  President of MedVest, Inc., a medical  consulting company. Dr. Abeles has a
M.D. from the University of Birmingham, England.  Dr. Abeles is a member of  the
boards  of  directors  of I-Flow  Corporation,  Oryx Technology  Corp.  and DUSA
Pharmaceuticals, Inc.
 
    HAROLD S. BLUE.   Mr. Blue  has been a  director of the  Company since  July
1996.  Since  February  1993, Mr.  Blue  has  been Chief  Executive  Officer and
Chairman of the  Board of  ProxyMed, Inc., a  healthcare information  technology
company.  From July 1992 until February 1995, Mr. Blue served as Chairman of the
Board and  Chief Executive  Officer of  Health Services  of Miami  Lakes,  Inc.,
Health  Services of  Pembroke Lakes,  Inc. and  Health Services  of North Miami,
Inc., each a physician practice management
 
                                       46
<PAGE>
group. From  June  1979 to  February  1992, Mr.  Blue  was President  and  Chief
Executive  Officer of Budget Drugs, Inc., a retail discount pharmacy chain. From
September 1984 to  August 1988, Mr.  Blue was Executive  Vice President of  Best
Generics  Incorporated,  a  national  generic  distribution  company,  which  he
co-founded.
 
    JACK H. HALPERIN,  ESQ.  Mr.  Halperin has  been a director  of the  Company
since June 1991 and served as Chairman of the Board of Directors from April 1995
until  the Merger Date. Mr.  Halperin is a corporate  attorney with expertise in
venture capital financing and has been practicing law independently since  1987.
Mr.  Halperin has a  B.A. degree in  english from Columbia  University and a law
degree from New York University School of Law. Mr. Halperin is also a member  of
the  boards  of  directors  of  Xytronyx,  Inc.,  I-Flow  Corporation  and Memry
Corporation.
 
    PAUL F. LAVALLEE.   Mr. Lavallee has  been a director  of the Company  since
December  1995. Since January 1996,  Mr. Lavallee has served  as a consultant to
Sigmedics, Inc.,  a  biomedical company.  From  1989 until  December  1995,  Mr.
Lavallee served as Chairman, President and Chief Executive Officer of Sigmedics,
Inc.  Mr. Lavallee has a B.S. degree in  biology from Bates College and a M.B.A.
degree from the University of Chicago.
 
    JOSEPH W. PLANDOWSKI.   Mr. Plandowski  has been a  director of the  Company
since  December 1995. He has been President  of The Lakewood Group, a healthcare
consulting firm, since  February 1995. From  May 1993 until  February 1995,  Mr.
Plandowski  was Vice President  -- Acquisitions of  National Health Laboratories
Inc., which owns  clinical and  anatomic laboratories  nationwide. From  October
1992  through May 1993, he  was Chief Operating Officer  of Nichols Institute, a
clinical reference  laboratory. From  February 1991  through October  1992,  Mr.
Plandowski  was President, Chief  Executive Officer and  a director of Genetrix,
Inc. Mr. Plandowski  has a B.S.  degree in mechanical  engineering and a  M.B.A.
degree from the State University of New York.
 
    LEONARD  M. SCHILLER, ESQ.  Mr. Schiller  has been a director of the Company
since April 1995. Since 1970, Mr. Schiller has been practicing real estate  law,
specializing  in contesting  real estate taxes  in the State  of Illinois. Since
1980, he has also been President  of The Dearborn Group, a residential  property
management  and real estate acquisition company.  Mr. Schiller has a B.A. degree
in liberal arts from the University of Iowa  and a law degree from the ITT  Kent
College Law School.
 
                                       47
<PAGE>
MEDICAL ADVISORY BOARD
 
    AccuMed's  Cytopathology Medical  Advisory Board is  composed of physicians,
scientists and  professors  who provide  advisory  consultation to  the  Company
regarding  technology application,  design, development,  marketing and customer
support issues relative to the Company's cytopathology products.
 
<TABLE>
<CAPTION>
BOARD MEMBER                                              POSITION
- --------------------------------------------------------  --------------------------------------------------------
<S>                                                       <C>
William J. Frable, M.D..................................  Director of the Division of Surgical & Cytopathology at
                                                          the Medical College of Virginia
Shirley E. Greening, M.S., J.D., CFIAC..................  Chairman and Professor of the Department of Laboratory
                                                          Sciences, Thomas Jefferson University
Heinz K. Grohs, M.D. ...................................  Chairman, Associate Director of Pathology and Chief of
                                                          Cytopathology, North Shore Medical Center, Salem,
                                                          Massachusetts
L. Patrick James, M.D...................................  Director of Laboratories, Health Midwest, Kansas City,
                                                          Missouri
Perry A. Lambird, M.D. .................................  President and Chief Executive Officer, PATHCOR, Oklahoma
                                                          City, Oklahoma
Bjorn Stenkvist, M.D., Ph.D. ...........................  Director of Clinical Cytology, Karolinska Institute and
                                                          Hospital, Stockholm, Sweden
David S. Weinberg, M.D., Ph.D...........................  Staff Pathologist, Department of Pathology, Brigham and
                                                          Women's Hospital, Boston, Massachusetts
</TABLE>
 
BOARD OF DIRECTORS
 
    Directors are  elected  at each  annual  meeting to  serve  one-year  terms.
Pursuant  to the Merger  Agreement, from the  Merger Date until  the next annual
meeting of  stockholders  of  the Company,  the  Board  of Directors  is  to  be
comprised  as follows: (i) Mr. Gombrich, as  Chairman of the Board of Directors,
(ii) two directors designated by AccuMed, Inc., (iii) three directors designated
by  Commonwealth  Associates  and  American  Equities  Overseas,  Inc.  ("AEO"),
jointly,  and (iv) one director selected mutually by the other six directors. In
accordance therewith,  (i)  Commonwealth  Associates  and  AEO  have  designated
Messrs. Schiller, Blue and Halperin (who is legal counsel to AEO), (ii) AccuMed,
Inc.  has designated  Messrs. Lavallee and  Plandowski, and (iii)  the other six
directors selected Dr. Abeles to serve on the Board of Directors.
 
COMMITTEES OF THE BOARD OF DIRECTORS.
 
    The Company has established Audit and Compensation Committees. Each of these
committees is responsible to the full Board of Directors, and its activities are
therefore subject to approval of the Board of Directors. The functions performed
by these committees are summarized below.
 
    The Audit  Committee is  responsible for  reviewing the  Company's  internal
accounting  controls, meeting and conferring with the Company's certified public
accountants, and reviewing the results of the accountants' auditing engagement.
 
    The Compensation Committee of the  Board of Directors is comprised  entirely
of  "disinterested"  directors  (within  the meaning  of  Rule  16b-3  under the
Securities  Exchange  Act  of  1934,  as  amended  (the  "Exchange  Act")).  The
Compensation  Committee  determines  base  compensation  and  discretionary cash
bonuses for the Company's senior executives. These determinations are subject to
the approval or ratification  of the full Board  of Directors. The  Compensation
Committee also determines the number and terms of stock options to be granted to
employees,  directors and  consultants of the  Company under  the Company' stock
option plans. See "-- Stock Option Plans."
 
                                       48
<PAGE>
DIRECTOR COMPENSATION
 
   
    Pursuant to the Board of Directors Compensation Plan adopted by the Board of
Directors on January  18, 1996, each  non-employee director is  entitled to  the
following   compensation  for  services  as   a  director:  (i)  an  immediately
exercisable, nonqualified stock option to purchase 20,000 shares of Common Stock
to be  granted  upon  appointment  to  the  Board  of  Directors,  and  (ii)  an
immediately  exercisable, nonqualified stock option to purchase 20,000 shares of
Common Stock to be granted on the  first trading day of each January  thereafter
during  which  a  non-employee  director  continues to  serve  on  the  Board of
Directors. Such options are to be granted under the Company's 1995 Stock  Option
Plan  or subsequent option plans. The exercise price per share shall be the fair
market value of  a share of  Common Stock on  the date of  grant. Directors  are
reimbursed  for reasonable expenses incurred in  attending meetings of the Board
of Directors and committees thereof.
    
 
EXECUTIVE COMPENSATION
 
   
    SUMMARY  COMPENSATION  INFORMATION.     The  following   tables  set   forth
information  concerning compensation paid or accrued  for the fiscal years ended
September 30, 1993, 1994 and 1995 and the twelve months ended December 31,  1995
by the Company to or on behalf of the Chief Executive Officer and the only other
executive  officer of the  Company whose total  salary and bonus  for the fiscal
year ended  September  30,  1995 exceeded  $100,000  (collectively,  the  "Named
Executive Officers").
    
 
                          SUMMARY COMPENSATION TABLES
 
<TABLE>
<CAPTION>
                                                                                        FISCAL           ANNUAL
                                                                                      YEAR ENDED     COMPENSATION/
                           NAME AND PRINCIPAL POSITION                               SEPTEMBER 30,       SALARY
- ----------------------------------------------------------------------------------  ---------------  --------------
<S>                                                                                 <C>              <C>
Peter P. Gombrich ................................................................          1995       $   65,625
 Acting Chief Executive Officer (1)
Kenneth D. Miller ................................................................          1995          110,556
 former Chief Executive Officer (2)                                                         1994          114,000
                                                                                            1993          117,500
</TABLE>
 
- ------------------------------
(1)  Mr.  Gombrich became Acting Chief Executive Officer of the Company on April
     21, 1995 and  became Chairman of  the Board of  Directors, Chief  Executive
     Officer and President on December 29, 1995.
 
(2)  Mr.  Miller  served as  Chief Executive  Officer until  April 21,  1995. He
     served as Senior Vice President from April 21, 1995 until June 30, 1996.
 
   
<TABLE>
<CAPTION>
                                                                             TWELVE MONTHS ENDED
                                                                              DECEMBER 31, 1995
                                                            -----------------------------------------------------
                                                                                                  LONG-TERM
                                                                                             COMPENSATION AWARDS
                                                                ANNUAL                      ---------------------
                                                            COMPENSATION/     ALL OTHER       SHARES UNDERLYING
               NAME AND PRINCIPAL POSITION                      SALARY       COMPENSATION    STOCK OPTIONS(#)(1)
- ----------------------------------------------------------  --------------  --------------  ---------------------
<S>                                                         <C>             <C>             <C>
Peter P. Gombrich ........................................    $  103,125      $   --                 200,000
 Chief Executive Officer (2)
Kenneth D. Miller ........................................       116,463          21,952              75,000
 former Chief Executive Officer (3)
</TABLE>
    
 
- ------------------------------
(1)  All such  options were  granted under  the  1995 Stock  Option Plan  at  an
     exercise  price of  $1.13 per  share, the last  reported sale  price of the
     Common Stock on the Nasdaq Market on the date of grant.
 
(2)  Mr. Gombrich became Acting Chief Executive Officer of the Company on  April
     21,  1995 and  became Chairman of  the Board of  Directors, Chief Executive
     Officer and President on December 29, 1995.
 
(3)  Mr. Miller  served as  Chief Executive  Officer until  April 21,  1995.  He
     served  as Senior Vice President  from April 21, 1995  until June 30, 1996.
     The amount listed under  the column "All  Other Compensation" represents  a
     relocation allowance.
 
                                       49
<PAGE>
     STOCK  OPTION GRANTS.  The  following table contains information concerning
grants of stock options to the Named Executive Officers during the twelve months
ended December 31, 1995. All such options were granted under the Company's  1995
Stock Option Plan.
 
         OPTION GRANTS DURING THE TWELVE MONTHS ENDED DECEMBER 31, 1995
 
   
<TABLE>
<CAPTION>
                                                                            INDIVIDUAL GRANTS
                                                    -----------------------------------------------------------------
                                                     NUMBER OF     % OF TOTAL SHARES
                                                       SHARES         UNDERLYING
                                                     UNDERLYING     OPTIONS GRANTED      EXERCISE
                                                      OPTIONS        TO EMPLOYEES          PRICE
                       NAME                         GRANTED (#)       IN YEAR (1)      ($/SHARE) (2)  EXPIRATION DATE
- --------------------------------------------------  ------------  -------------------  -------------  ---------------
<S>                                                 <C>           <C>                  <C>            <C>
Peter P. Gombrich.................................      200,000            17.6%         $    1.13         12/29/05
Kenneth D. Miller (3).............................       75,000             6.6               1.13         12/29/05
</TABLE>
    
 
- ------------------------------
(1)  The  Company  granted  to employees  options  to purchase  an  aggregate of
     1,111,000 shares of Common  Stock during the  twelve months ended  December
     31, 1995.
 
(2)  All  such  options were  granted under  the  1995 Stock  Option Plan  at an
     exercise price of  $1.13 per  share, the last  reported sale  price of  the
     Common Stock on the Nasdaq Market on the date of grant.
 
(3)  Mr.  Miller was granted an option to purchase 75,000 shares of Common Stock
     on December 29, 1995. The  option was immediately exercisable with  respect
     to  25,000  shares  and  was  to  become  exercisable  with  respect  to an
     additional 25,000  shares on  December 29,  1996 and  with respect  to  the
     remaining  25,000 shares on December 29, 1997. Pursuant to the terms of the
     1995 Stock Option  Plan, the  remaining options to  purchase 50,000  shares
     will  terminate  automatically  on September  30,  1996  (unless previously
     exercised),  three  months  following  the  date  on  which  Mr.   Miller's
     employment terminates. See "-- Stock Option Plans."
 
     YEAR-END OPTION HOLDINGS.  The following table provides certain information
regarding  the unexercised  options held by  the Named Executive  Officers as of
December 31, 1995.  No options were  exercised by the  Named Executive  Officers
during the twelve months ended December 31, 1995.
 
                    UNEXERCISED OPTIONS AT DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                                       NUMBER OF SHARES
                                                                                          UNDERLYING
                                                                                     UNEXERCISED OPTIONS
                                                                                     AT DECEMBER 31, 1995
                                                                                            (#)(1)
                                                                                  --------------------------
                                      NAME                                        EXERCISABLE  UNEXERCISABLE
- --------------------------------------------------------------------------------  -----------  -------------
<S>                                                                               <C>          <C>
Peter P. Gombrich...............................................................      66,666       133,334
Kenneth D. Miller...............................................................     167,000        50,000
</TABLE>
 
- ------------------------------
(1)  None  of such options was  in the money at December  31, 1995, based on the
     last reported sale price  of the Common Stock  on December 29, 1995,  which
     was the last trading day prior to December 31, 1995.
 
EMPLOYMENT, SEVERANCE AND SEPARATION AGREEMENTS
 
    GOMBRICH  EMPLOYMENT  AND SEVERANCE  AGREEMENT.   Pursuant to  an Employment
Agreement dated August 1, 1994 between Peter P. Gombrich and AccuMed, Inc. which
was assumed by the Company as a  result of the Merger (the "Gombrich  Employment
Agreement"),  Mr. Gombrich serves  as Chairman of the  Board of Directors, Chief
Executive Officer  and  President  of  the Company.  Pursuant  to  the  Gombrich
Employment   Agreement,  Mr.  Gombrich   is  entitled  to   receive  (i)  annual
compensation of $175,000 and (ii)  a minimum annual cash  bonus equal to 30%  of
base  salary for the relevant year, and  additional bonuses as determined by the
Board of Directors, at its discretion. If the Company terminates Mr.  Gombrich's
employment  without cause  or Mr.  Gombrich terminates  his employment  for good
reason or at any  time after 180 days  following the date on  which a Change  of
Control  (as defined below) occurs, Mr. Gombrich would be entitled to a lump-sum
severance payment equal to three times his annual salary. In addition, upon  the
occurrence  of a Change of Control, any stock options held by Mr. Gombrich would
immediately vest  and  be  fully  exercisable.  For  purposes  of  the  Gombrich
Employment  Agreement, a Change of Control shall  be deemed to occur if: (i) any
third party  directly or  indirectly acquires  20% or  more of  the  outstanding
Common Stock, (ii) the Company engages in a
 
                                       50
<PAGE>
merger,  consolidation or reorganization that results in holders of Common Stock
immediately prior to such transaction holding less than a majority of the voting
power of the resulting entity, (iii) the Company sells all or substantially  all
of  its assets or (iv) Mr. Gombrich's employment is terminated by the Company on
a date within 90 days prior to the date on which a Change of Control occurs.
 
    The employment term  continues until  August 1, 1999.  Thereafter, the  term
will  be automatically  extended for  additional one-year  periods unless either
party delivers notice of election not to extend the employment at least 60  days
prior to the end of the then current term.
 
   
    PRESSMAN  EMPLOYMENT AGREEMENT.  Pursuant  to the Employment Agreement dated
June 13, 1996 as  amended July 16,  1996, between the  Company and Dr.  Pressman
(the  "Pressman Employment  Agreement"), Dr.  Pressman will  serve as President,
Cytopathology Division and Corporate  Senior Vice President  of the Company  for
five  years beginning July 5, 1996. Dr. Pressman's annual salary is $157,500 and
he is eligible to receive annually (i) cash bonuses of up to 30% of such  annual
salary,  and (ii)  incentive stock  options to purchase  up to  50,000 shares of
Common Stock  based  on  the  achievement of  mutually  agreed  upon  goals  and
objectives.  On July 8, 1996, Dr. Pressman  was granted an option to purchase an
aggregate of 250,000 shares of  Common Stock at an  exercise price of $6.25  per
share  (the last reported sale price of the Common Stock on the Nasdaq Market on
the date  on which  Dr. Pressman's  employment commenced)  which is  immediately
exercisable  with  respect to  50,000 shares  and  will become  exercisable with
respect to  50,000  additional  shares  on each  of  the  first  through  fourth
anniversaries  of  the grant  date. Dr.  Pressman was  granted 25,000  shares of
Common Stock on  the date  on which  Dr. Pressman's  employment commenced.  Such
shares  may not be transferred during the  18-month period following the date of
issuance and would be  forfeited to the Company  if Dr. Pressman terminates  the
Pressman  Employment Agreement during such period, other than due to a breach by
the Company. Dr. Pressman is entitled to  borrow up to $85,200 from the  Company
for the purpose of paying taxes due in connection with the grant of such shares.
Such loan shall be repaid without interest in installments to be mutually agreed
upon  by Dr. Pressman and the Company.  The Company may terminate Dr. Pressman's
employment for cause at any time upon written notice. The Company may  terminate
his  employment without cause upon six months' written notice, in which case Mr.
Pressman would  be entitled  to an  amount  equal to  twelve months'  salary  as
severance,  paid over  twelve months.  Mr. Pressman  may terminate  the Pressman
Employment Agreement for any reason upon six months' written notice.
    
 
    MILLER SEPARATION AGREEMENT.  Pursuant  to the Merger Agreement, Mr.  Miller
and  the Company entered into  a letter agreement dated  as of November 21, 1995
(the "Miller Employment Letter") pursuant to  which Mr. Miller served as  Senior
Vice  President of  the Company. Pursuant  to the Miller  Employment Letter, Mr.
Miller was entitled  to receive  (i) an  annual salary  of $105,000  and (ii)  a
quarterly  bonus of $6,250.  He also received  25,000 shares of  Common Stock in
January 1996 and  an option  to purchase  75,000 shares  of Common  Stock at  an
exercise  price of $1.13 per  share (the last reported  sale price of the Common
Stock on the Nasdaq  Market on the Merger  Date). The employment term  commenced
October  1, 1995.  Pursuant to the  Employment Separation  Agreement and Release
(the "Miller Separation Agreement") dated June  24, 1996 between Mr. Miller  and
the Company, Mr. Miller voluntarily resigned from the Company effective June 30,
1996. During July through October 1996, Mr. Miller is to spend 70% of the normal
work  week discharging  responsibilities as acting  President of RADCO  and as a
consultant to the Company. For rendering such services, Mr. Miller is to receive
$1,875 per month from the Company and  $4,250 per month from RADCO. Pursuant  to
the  Miller Separation  Agreement, Mr.  Miller received  approximately $8,600 in
respect of accrued vacation time and $7,437 with respect to relocation  expenses
and is entitled to receive as a severance payment up to an additional $35,000 to
be  paid in  monthly installments  prior to February  1997. Mr.  Miller has also
agreed to a one-year covenant-not-to-compete with the Company.
 
    SANTOR EMPLOYMENT LETTER  AND SEPARATION  AGREEMENT.  Pursuant  to a  letter
agreement  between Mr. Santor and the Company dated as of February 28, 1995 (the
"Santor Employment Letter"), Mr. Santor  serves as Chief Financial Officer  and,
until  June 1996,  served as  Vice President  of Finance  and Operations  of the
Company. Pursuant to  the Santor Employment  Letter, Mr. Santor  is entitled  to
receive (i) an annual salary of $105,000 and (ii) an annual bonus of $15,000. He
also received 35,000 shares of
 
                                       51
<PAGE>
   
Common  Stock in January 1996 and an  option to purchase 75,000 shares of Common
Stock at an exercise price of $1.13  per share (the last reported sale price  of
the  Common  Stock on  the Nasdaq  Market on  the Merger  Date). Pursuant  to an
Employment Separation Agreement and Release (the "Santor Separation  Agreement")
between Mr. Santor and the Company dated June 10, 1996, Mr. Santor will continue
to serve as Chief Financial Officer until August 30, 1996. On June 11, 1996, Mr.
Santor's  outstanding stock options  to purchase 106,961  shares of Common Stock
accelerated and  became fully  exercisable. Pursuant  to the  Santor  Separation
Agreement,  the Company also forgave $3,300 of  the principal balance due to the
Company under a promissory note made by  Mr. Santor. Mr. Santor has also  agreed
to  a one-year  covenant-not-to-compete with the  Company. Pursuant  to a letter
agreement dated August 19, 1996,  Mr. Santor will serve  as a consultant to  the
Company  during September 1996  in order to  facilitate the transition  to a new
Chief Financial Officer.
    
 
STOCK OPTION PLANS
 
    The Company has in  effect three stock option  plans, the 1995 Stock  Option
Plan,  as amended (the "1995 Plan"), the  Amended and Restated 1992 Stock Option
Plan (the "1992 Plan"), and the Amended and Restated 1990 Stock Option Plan (the
"1990 Plan," and together with  the 1995 Plan and  the 1992 Plan, the  "Plans").
Administration  of the Plans has been delegated to the Compensation Committee of
the Board of Directors, consisting entirely of "disinterested" directors  within
the  meaning  of  Rule  16b-3  promulgated under  the  Exchange  Act.  Each Plan
authorizes the  Compensation  Committee to  grant  to employees,  directors  and
consultants  of  the  Company  incentive  stock  options  intended  to  meet the
requirements of Section 422 of the Internal Revenue Code of 1986, as amended, as
well as nonqualified stock options. The terms of the Plans are summarized below.
 
   
    As of August  27, 1996, (i)  options to purchase  an aggregate of  1,488,000
shares  of Common Stock were outstanding under  the 1995 Plan and 358,500 shares
remained available  for future  grant thereunder,  (ii) options  to purchase  an
aggregate  of 54,711 shares of Common Stock were outstanding under the 1992 Plan
and 104,447 shares  remained available  for future grant  thereunder, and  (iii)
options  to  purchase  an  aggregate  of  7,815  shares  of  Common  Stock  were
outstanding under the 1990 Plan and 80,794 shares remained available for  future
grant thereunder.
    
 
  1995 PLAN
 
    The  1995  Plan  was  adopted  by  the  Company's  Board  of  Directors  and
stockholders in October  1995 and December  1995, respectively, authorizing  the
granting  of a  combination of  incentive stock  options and  nonqualified stock
options to purchase an aggregate of up  to 1,500,000 shares of Common Stock.  In
July  1996, the Board of Directors amended the 1995 Plan, subject to stockholder
approval, to increase from 1,500,000 to 2,000,000 the number of shares available
for issuance upon exercise  of options authorized to  be granted under the  1995
Plan. No option may be granted after October 6, 2005.
 
    Under  the 1995 Plan, full-time employees of the Company, including officers
and directors who are employees of  the Company, are eligible to receive  grants
of either incentive stock options or nonqualified stock options. Consultants and
non-employee  directors  are  eligible  to be  granted  only  nonqualified stock
options under the 1995 Plan.  The Compensation Committee, within the  parameters
of  the 1995 Plan, has  authority to determine to  whom options are granted, the
number of shares underlying options granted, and the terms of such options. Each
option grant is evidenced by a stock option agreement.
 
    EXERCISE PRICE.    The option  exercise  price  per share  with  respect  to
nonqualified  stock options granted under the 1995  Plan must be at least 75% of
the fair market value  per share of  the Company's Common Stock  on the date  of
grant  of the option.  The exercise price  per share of  Common Stock underlying
incentive stock options granted under  the 1995 Plan must  be at least the  fair
market  value of the Common Stock on the grant date, except that incentive stock
options granted to an employee who on the  grant date owns more than 10% of  the
combined  voting power of  all classes of  stock of the  Company (a "Ten Percent
Holder") must have an exercise price of at least 110% of fair market value. Fair
market value for purposes of  the 1995 Plan is the  last reported sale price  of
the Common Stock on the Nasdaq Market on the date of grant.
 
                                       52
<PAGE>
    EXERCISE.   The options may be immediately  exercisable on the date of grant
or the  right to  acquire shares  underlying the  options may  become vested  as
determined  by  the Compensation  Committee and  specified  in the  stock option
agreement. In no event may  any option be exercised more  than ten years, or  in
the case of incentive stock options held by a Ten Percent Holder, more than five
years,  after the date of grant. Payment of  the exercise price is to be made in
cash, by the delivery to the Company of  shares of Common Stock or, in the  case
of  nonqualified  options,  by  a so-called  "cashless  exercise."  Common Stock
surrendered in payment of the exercise price  will be valued at its fair  market
value as of the exercise date.
 
    TERMINATION.  The 1995 Plan provides that an optionee whose engagement by or
employment  with the Company has terminated, other than by reason of retirement,
death or permanent  disability, may  exercise his or  her outstanding  incentive
stock  options for a period of 30 days  from the date of such termination. If an
incentive stock  option  holder  retires  after  the  age  of  55,  dies  or  is
permanently  disabled, such optionee, or his or her personal representative, may
exercise such outstanding incentive stock options within one year after the date
of such retirement, death or disability. A nonqualified stock option granted  to
directors  may be  exercised by  the optionee  after he  or she  ceases to  be a
director of the Company until such option expires in accordance with the  option
agreement  governing such  option. The  Compensation Committee  shall specify in
each nonqualified  stock  option  agreement the  circumstances  under  and  time
periods  during which an optionee who is  no longer an employee or consultant of
the Company may exercise his or  her outstanding nonqualified stock options.  To
the  extent that an optionee was not entitled to exercise options at the date of
termination of his or her employment, or if the optionee does not exercise  such
options  within the time specified in the applicable stock option agreement, the
options terminate. Under no  circumstances will an  option be exercisable  after
the termination date specified in the option agreement governing the option.
 
  1990 PLAN AND 1992 PLAN
 
    The  1990 Plan  was adopted  by the Board  of Directors  and stockholders in
October 1990  and February  1991,  respectively. The  1990 Plan  authorizes  the
granting  of incentive stock options and  nonqualified stock options to purchase
an aggregate of 177,324 shares of Common Stock. The 1992 Plan was adopted by the
Board of Directors and stockholders in February 1992 and May 1992, respectively.
The  1992  Plan  authorizes  the   granting  of  incentive  stock  options   and
nonqualified  stock options to purchase an aggregate of 505,000 shares of Common
Stock.
 
    The 1990  Plan and  the 1992  Plan permit  the granting  of incentive  stock
options  to employees and nonqualified stock options to employees, directors and
consultants. The Compensation Committee, within the parameters of the respective
Plans, has the authority to determine to whom options are granted and the  terms
of such options. Each option grant is evidenced by a stock option agreement.
 
    EXERCISE  PRICE.  The exercise price of  options granted under the 1990 Plan
or the 1992  Plan is determined  by the  Compensation Committee and  must be  at
least  the fair market  value of the  Common Stock on  the date of  grant of the
option, except that an  incentive stock option granted  to a Ten Percent  Holder
must have an exercise price of at least 110% of such fair market value.
 
    EXERCISE.   The options may be immediately  exercisable on the date of grant
or the  right to  acquire shares  underlying the  options may  become vested  as
determined  by the Compensation Committee and specified in the option agreement,
except that all options shall become exercisable with respect to at least 20% of
the underlying shares per year on each of the first through fifth  anniversaries
of  the grant date. In no event may any option be exercised more than five years
after the date of grant. Payment of the exercise price is to be made in cash, by
the delivery to the Company of shares of Common Stock or by such other method as
the Compensation Committee may approve.
 
    IMMEDIATELY EXERCISABLE OPTIONS.  The 1990 Plan and the 1992 Plan permit the
Compensation Committee to grant immediately exercisable nonqualified options for
which the  Company will  retain a  repurchase option.  The Company's  repurchase
option lapses over a period of time in accordance with the terms of a restricted
stock purchase agreement governing the terms of the grant.
 
                                       53
<PAGE>
   
    TERMINATION.  The 1990 Plan and the 1992 Plan provide that an optionee whose
engagement  by  or employment  with the  Company has  terminated, other  than by
reason of his  or her death  or permanent  disability, may exercise  his or  her
stock  options upon the terms provided in the applicable stock option agreement,
provided that all incentive stock options shall terminate three months after the
optionee ceases to be  an employee of the  Company. If an optionee's  employment
with or position as a director of the Company is terminated because of the death
or  disability of  the optionee,  the option, to  the extent  exercisable by the
optionee on the date of such termination,  may be exercised by the optionee  (or
the  optionee's legal  representative) until  the earlier  of the  twelve months
following the termination date  or the date upon  which such option expires.  To
the extent that an optionee was not entitled to exercise the options at the date
of  termination of his or  her employment, or if  the optionee does not exercise
such options within the time specified in the applicable stock option agreement,
the options  terminate. Under  no circumstances  will an  option be  exercisable
after  the  termination date  specified in  the  option agreement  governing the
option.
    
 
                                       54
<PAGE>
                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
   
    Commonwealth  Associates   is  a   principal  stockholder   and  a   Selling
Stockholder.  Pursuant to a letter agreement dated as of February 14, 1995 among
the Company, AccuMed, Inc. and Commonwealth Associates, Commonwealth  Associates
was  paid a fee for acting as a  "finder" in connection with the Merger. The fee
was paid in the form of $50,000 in  cash, 444,444 shares of Common Stock, and  a
five-year  warrant  to purchase  up  to 750,000  shares  of Common  Stock  at an
exercise price of $1.25 per share. During 1995, Commonwealth Associates acted as
placement agent for the  Company in certain private  placements of Common  Stock
for  which Commonwealth Associates received an aggregate of (i) $353,000 in cash
commissions,  (ii)  a  non-accountable  expense  allowance  of  $106,000,  (iii)
approximately $10,600 in reimbursement for the fees and expenses of counsel, and
(iv) a warrant to purchase an aggregate of 564,840 shares of the Common Stock at
an   exercise  price  of  $0.625  per  share.  During  1995,  the  Company  paid
Commonwealth Associates an aggregate of $59,000 in cash pursuant to a Consulting
Agreement in  effect  from  January  1,  1995  through  December  31,  1995.  As
reimbursement  for  certain  expenses  incurred  by  Commonwealth  Associates in
connection  with  a  terminated  private  placement  of  securities  for   which
Commonwealth Associates was to act as placement agent, the Company (i) issued to
Commonwealth  Associates on December 31, 1994 a five-year warrant to purchase an
aggregate of 420,000 shares of  Common Stock at an  exercise price of $0.25  per
share  and (ii) issued  to designees of Commonwealth  Associates on December 29,
1995 five-year warrants  to purchase an  aggregate of 104,000  shares of  Common
Stock at an exercise price of $2.125 per share, which warrants expire on October
31,  1997. Commonwealth Associates acted  as a placement agent  for a portion of
the private placements of securities by the Company from July through  September
1993  for which Commonwealth  Associates received aggregate  cash commissions of
$276,000 and a non-accountable expense allowance of $20,000.
    
 
   
    The Company  has agreed,  with respect  to the  exercise of  the  Redeemable
Warrants issued in connection with the Company's initial public offering, to pay
to  Commonwealth Associates a fee of 5% of the exercise price of each Redeemable
Warrant exercised; provided, however, that  Commonwealth Associates will not  be
entitled   to  receive   such  compensation  for   Redeemable  Warrant  exercise
transactions in which: (i) the market price  of the Common Stock at the time  of
the  exercise is lower than the exercise  price of the Redeemable Warrants; (ii)
the Redeemable Warrants are held in any discretionary account; (iii)  disclosure
of  compensation arrangements  is not made  in documents provided  to holders of
Redeemable Warrants at the time of exercise; (iv) the exercise of the Redeemable
Warrants is unsolicited; and (v) the transaction was in violation of Rule  10b-6
promulgated  under the Exchange Act. As  of August 27, 1996, Redeemable Warrants
had been exercised to purchase 200 shares of Common Stock.
    
 
   
    The  Company  issued   to  AEO,  a   Selling  Stockholder,  an   immediately
exercisable,  five-year warrant to purchase up to 100,000 shares of Common Stock
at an exercise price of $0.25 per share.  Such warrant was issued to AEO by  the
Company  in  September 1995  as reimbursement  for expenses  incurred by  AEO in
connection with a terminated private placement in 1994 and advisory services  in
connection  with certain of the Company's  European stockholders. In March 1996,
the Company issued to AEO immediately exercisable five-year warrants to purchase
an aggregate of 42,500 shares of Common Stock at an exercise price of $3.87  per
share  and 20,000  shares at an  exercise price  of $3.42 per  share, as partial
compensation for its services in placing  warrants to purchase Common Stock  and
securities of RADCO in connection with the capitalization of RADCO. AEO acted as
placement  agent in connection with the sale of Common Stock to certain European
investors in  May 1996,  for which  it received  aggregate cash  commissions  of
$56,250.  Pursuant to an agreement dated July  18, 1996 among the Company, RADCO
and AEO, the Company will be  obligated to pay to AEO  a fee of $15,000 in  cash
upon consummation of the RADCO Acquisition.
    
 
    Pursuant to the Merger Agreement, from the Merger Date until the next annual
meeting  of  stockholders  of the  Company,  the  Board of  Directors  is  to be
comprised as follows: (i) Mr. Gombrich,  as Chairman of the Board of  Directors,
(ii) two directors designated by AccuMed, Inc., (iii) three directors designated
mutually  by Commonwealth  Associates and  AEO, and  (iv) one  director selected
mutually by
 
                                       55
<PAGE>
   
the other six  directors. In accordance  therewith, (i) Commonwealth  Associates
and  AEO have designated  Messrs. Schiller, Blue and  Halperin (legal counsel to
AEO), (ii) AccuMed, Inc. designated  Messrs. Lavallee and Plandowski, and  (iii)
the other six directors selected Dr. Abeles to serve on the Board of Directors.
    
 
   
    The Company loaned to Peter P. Gombrich, Chairman of the Board of Directors,
Chief  Executive Officer and President of the Company and a Selling Stockholder,
$61,000 evidenced by  a promissory  note made  May 22,  1996, initially  bearing
interest  at a rate of 10% per annum, payable monthly in arrears, with principal
and accrued interest due within ten  days following the date of such  promissory
note. In August 1996, Mr. Gombrich paid the loan balance in full.
    
 
    The  Board of Directors of  the Company issued a  warrant to purchase 75,000
shares of Common Stock to Leonard M.  Schiller, a director of the Company and  a
Selling  Stockholder, in consideration for services  provided by Mr. Schiller to
AccuMed,  Inc.  in  connection  with  the  Merger.  Such  warrant  is  currently
exercisable  at $1.13 per share  (the closing sale price  of the Common Stock on
the Nasdaq  Market on  the date  of issuance  of such  warrant) and  expires  on
December 29, 2000.
 
   
    Gwenda  Jay Gombrich, the wife of  Peter P. Gombrich, the Company's Chairman
of the Board  of Directors,  Chief Executive  Officer and  President, loaned  to
AccuMed,  Inc. an  aggregate of $65,000  pursuant to a  letter agreement between
AccuMed, Inc. and Ms. Gombrich dated October 28, 1994, which was assumed by  the
Company  in connection with the  Merger. Interest was payable  at the rate of 1%
per month on the outstanding balance,  with a minimum interest payment of  $750.
In June 1996, the loan balance was paid in full.
    
 
   
    Ms.  Gombrich contributed an aggregate of  $75,000 to AccuMed, Inc. prior to
the Merger, evidenced by Promissory Notes dated May 18, 1994 and August 31, 1994
(the "Gombrich Promissory Notes") and the Interim Financing Agreements dated May
18, 1994  and December  1994 (the  "Interim Financing  Agreements"), each  among
AccuMed,  Inc. and Ms. Gombrich as custodian for her minor children. Pursuant to
the Interim  Financing Agreements,  the  principal amount  and the  accrued  and
unpaid  interest on the Gombrich Promissory  Notes were required to be converted
into shares  of  common  stock  of  AccuMed, Inc.  prior  to  the  Merger.  Such
conversion  did not take place. Upon consummation of the Merger, the obligations
of AccuMed, Inc. to  Ms. Gombrich pursuant to  the Interim Financing  Agreements
and the Gombrich Promissory Notes were assumed by the Company. In June 1996, the
Company  issued  to Ms.  Gombrich  as custodian  for  certain minor  children an
aggregate of 166,586 shares of the  Company's Common Stock in full  satisfaction
of  the Company's obligations  pursuant to the  Interim Financing Agreements and
the Gombrich Promissory Notes.
    
 
   
    Hultquist Capital LLC ("Hultquist"), a Selling Stockholder, acted as special
advisor to the Board of Directors of the Company in connection with the  Merger.
Pursuant  to the agreement providing for such services, Hultquist (i) was issued
56,000 shares of Common  Stock on the  Merger Date and (ii)  was entitled to  be
paid cash compensation in the aggregate amount of $105,000, of which $66,000 had
been paid and $39,000 was payable as of July 31, 1996.
    
 
   
    Robert  Priddy, a Selling Stockholder, loaned the Company $250,000 evidenced
by a Promissory Note made  January 25, 1995, bearing interest  at a rate of  11%
per  annum, payable monthly in arrears,  with principal and accrued interest due
on or prior to  90 days following the  date thereof. The indebtedness  evidenced
thereby  was repaid  in May  1996. In  consideration for  making such  loan, the
Company issued to  Mr. Priddy  a warrant  to purchase  up to  100,000 shares  of
Common Stock at an exercise price of $1.25 per share (subject to adjustment).
    
 
                                       56
<PAGE>
                       PRINCIPAL AND SELLING STOCKHOLDERS
 
   
    The  table below sets forth  certain information as of  August 27, 1996 (the
"Reference Date") with respect  to the beneficial ownership  of Common Stock  by
(i)  each person known by the Company to be the beneficial owner of more than 5%
of the outstanding shares of Common  Stock, (ii) each director, (iii) the  Named
Executive  Officers, (iv) officers and directors as a group, and (v) the Selling
Stockholders. On  the Reference  Date, there  were 18,858,736  shares of  Common
Stock outstanding.
    
 
   
<TABLE>
<CAPTION>
                                                                                                                     SHARES
                                                                     SHARES BENEFICIALLY OWNED                 BENEFICIALLY OWNED
                                                                       PRIOR TO OFFERING (1)      SHARES TO    AFTER OFFERING (1)
NAME AND ADDRESS                                                    ---------------------------   BE SOLD IN   ------------------
OF BENEFICIAL OWNER                                                      NUMBER         PERCENT    OFFERING     NUMBER    PERCENT
- ------------------------------------------------------------------  -----------------   -------   ----------   ---------  -------
<S>                                                                 <C>                 <C>       <C>          <C>        <C>
DIRECTORS, EXECUTIVE OFFICERS
 AND 5% STOCKHOLDERS(2)
Peter P. Gombrich.................................................  3,556,950(3)           18.8%     250,000   3,306,950     14.8%
Michael Falk .....................................................  2,796,931(4)           13.2      225,000   2,571,931     10.5
 c/o Commonwealth Associates
 733 Third Avenue
 New York, NY 10017
Commonwealth Associates ..........................................  1,889,300(5)            9.2      100,000   1,789,300      7.5
 733 Third Avenue
 New York, NY 10017
John H. Abeles....................................................    326,657(6)            1.7       41,020     285,637      1.3
Jack H. Halperin..................................................     80,388(7)           *          20,000      60,388     *
Michael D. Burke..................................................     85,797(8)           *          12,000      73,797     *
Leonard M. Schiller...............................................    172,159(9)           *           8,000     164,159     *
Paul F. Lavallee..................................................     25,000(10)          *           7,500      17,500     *
Mark L. Santor....................................................    144,247(11)          *              --     144,247     *
Norman J. Pressman................................................     75,000(12)          *              --      75,000     *
Joseph W. Plandowski..............................................     25,000(13)          *              --      25,000     *
Harold S. Blue....................................................     20,000(13)          *              --      20,000     *
All directors and executive officers as a group (10 persons)......  4,511,198(14)          23.3%     338,520   4,172,678     18.4%
 
OTHER SELLING STOCKHOLDERS
Robert Priddy.....................................................    900,000(15)           4.7      200,000     700,000      3.1%
Clarion Capital Corp..............................................    320,000               1.7      150,000     170,000     *
Anne Falk.........................................................    907,631(16)(17)       4.6      125,000     782,631      3.4
Gallagher Investment Corp.........................................    240,000               1.3       72,000     168,000     *
Richard Friedman..................................................     80,000              *          71,630       8,370     *
Hultquist Capital LLC (18)........................................     56,000              *          54,327       1,673     *
John Robinson.....................................................     88,742(16)(19)      *          50,000      38,742     *
G&G Diagnostics LP I..............................................     75,000              *          50,000      25,000     *
Fred Kassner......................................................    160,000              *          48,000     112,000     *
Andrew B. Hart....................................................     40,000              *          40,000          --     *
Charles Potter....................................................     40,000              *          40,000          --     *
William R. and Barbara J. Schoen..................................     40,000              *          40,000          --     *
George B. and Anna M. Pocisk......................................    277,337               1.5       36,000     241,337      1.1
Ann F. Gallagher..................................................     80,000              *          35,000      45,000     *
Christopher C. Gallagher..........................................     80,000              *          35,000      45,000     *
Vincent LaBarbara.................................................    110,696(13)(16)      *          30,000      80,696     *
J.A. Cardwell.....................................................     80,000              *          30,000      50,000     *
John Luck.........................................................     40,000              *          30,000      10,000     *
G & G Dispensing, Inc.............................................    320,000(20)           1.7       28,000     292,000      1.3
</TABLE>
    
 
                                       57
<PAGE>
   
<TABLE>
<CAPTION>
                                                                                                                     SHARES
                                                                     SHARES BENEFICIALLY OWNED                 BENEFICIALLY OWNED
                                                                       PRIOR TO OFFERING (1)      SHARES TO    AFTER OFFERING (1)
NAME AND ADDRESS                                                    ---------------------------   BE SOLD IN   ------------------
OF BENEFICIAL OWNER                                                      NUMBER         PERCENT    OFFERING     NUMBER    PERCENT
- ------------------------------------------------------------------  -----------------   -------   ----------   ---------  -------
American Equities Overseas, Inc...................................    206,275(13)(16)       1.1       25,000     181,275     *
<S>                                                                 <C>                 <C>       <C>          <C>        <C>
Philip L. Thomas..................................................    461,313(21)           2.4       24,000     437,313      1.9
Joseph L. Schocken................................................     23,495(22)          *          23,495          --     *
Frederick J. Oswald...............................................     40,000              *          20,000      20,000     *
James A. Cardwell, Jr.............................................     40,000              *          20,000      20,000     *
Broadmark Capital Corporation.....................................     15,600(13)          *          15,600          --     *
The P.L. Thomas Group, Inc........................................    301,313(13)           1.6       15,500     285,813      1.3
Leslie Hannafey...................................................     37,929(13)(16)      *          15,000      22,929     *
Richard S. Corbin.................................................     47,159(23)          *          15,000      32,159     *
Alan Hammerman....................................................     40,000              *          12,000      28,000     *
Stephen Warner....................................................     37,929(13)(16)      *          11,379      26,550     *
Murray Segal......................................................     10,298(13)(16)      *          10,298          --     *
Richard A. Voell..................................................     40,000              *          10,000      30,000     *
Sheila Y. Schiller................................................     40,000              *          10,000      30,000     *
Suzanne Schiller..................................................     40,000              *          10,000      30,000     *
Cathy Ross........................................................     20,000(13)(16)      *          10,000      10,000     *
Joel S. Kanter (24)...............................................      9,215              *           9,215          --     *
Hamilton T. Bailey................................................     40,000              *           8,000      32,000     *
Donald M. Earhart (25)............................................     35,054              *           7,700      27,354     *
Joseph D. Ferrone.................................................     32,000              *           6,400      25,600     *
Alan Ebler........................................................      6,000(13)          *           6,000          --     *
David Panvelle....................................................      6,000(13)          *           6,000          --     *
Peggy Howard......................................................      6,000(13)          *           6,000          --     *
Peter Korreng.....................................................      6,000(13)          *           6,000          --     *
Sharon Gignac.....................................................      6,000(13)          *           6,000          --     *
Paul Goldenheim...................................................     10,000              *           5,000       5,000     *
Robert O'Sullivan.................................................      7,174(13)(16)      *           5,000       2,174     *
Henry T. Wilson (26)..............................................      8,550              *           4,050       4,500     *
Wertheimer Partnership............................................     40,000              *           4,000      36,000     *
Keith Rosenbloom..................................................     12,542(13)(16)      *           4,000       8,542     *
Robert Tucker.....................................................      3,530(13)          *           3,530          --     *
Basil Ascuitto....................................................      1,988(13)(16)      *           1,988          --     *
Marc Siegel.......................................................      1,988(13)(16)      *           1,988          --     *
Alan C. and Linda Alhadeff........................................      1,906              *           1,906          --     *
Leslie Group......................................................      3,530(13)(16)      *           1,788       1,742     *
Marco Giudice.....................................................      1,367(13)(16)      *           1,367          --     *
Vincent Ricciardi.................................................      1,367(13)(16)      *           1,367          --     *
Russell Bailenson.................................................      1,000(13)(16)      *           1,000          --     *
Eric Rand.........................................................        597(13)(16)      *             597          --     *
</TABLE>
    
 
- ------------------------------
  * Represents less than 1%.
 
 (1)  Unless otherwise noted, the Company believes that all persons named in the
    table have sole voting  and investment power with  respect to all shares  of
    Common  Stock listed as beneficially owned by them. A person is deemed to be
    the beneficial holder  of securities  that can  be acquired  by such  person
    within  60 days  from the  Reference Date upon  the exercise  of warrants or
    options. Each  beneficial  owner's  percentage ownership  is  determined  by
    including  shares, underlying options  or warrants which  are exercisable by
    such person currently, or within 60  days following the Reference Date,  and
    excluding shares underlying options and warrants held by any other person.
 
 (2)  Except as  otherwise noted,  the address  for each  person is  c/o AccuMed
    International, Inc., 900 North Franklin Street, Suite 401, Chicago, Illinois
    60610.
 
 (3) Includes 66,666 shares underlying stock  options held by Mr. Gombrich  that
    are  exercisable currently or  within 60 days  following the Reference Date.
    Includes 513,818 shares held  of record by  Gwenda Gombrich, Mr.  Gombrich's
    wife, directly or as
 
                                       58
<PAGE>
   
    custodian  for minor children, as to which Mr. Gombrich disclaims beneficial
    ownership. Includes  537,381 shares  subject to  forfeiture if  the  Company
    fails  to  meet  certain  earnings  per  share  or  stock  price performance
    thresholds  during  1997  (the  "Performance  Shares").  See   "Management's
    Discussion and Analysis of Financial Condition and Results of Operations."
    
 
   
 (4)  Mr. Falk  directly owns  222,222 shares  of Common  Stock and  warrants to
    purchase up to 585,409 shares of Common Stock. The number shown includes  an
    additional 222,222 shares, and 1,667,078 shares underlying warrants that are
    exercisable  currently or within 60 days  following the Reference Date, held
    by  Commonwealth  Associates  (excluding  securities  held  in  Commonwealth
    Associates'  trading account). Mr. Falk is a control person of the corporate
    general  partner  of  Commonwealth  Associates  and  may  be  deemed  to  be
    beneficial  owner of securities held  by Commonwealth Associates. The number
    of shares also  includes an  additional 100,000  shares underlying  warrants
    that  are exercisable  currently or within  60 days  following the Reference
    Date held by  Anne Falk, Mr.  Falk's spouse. Mr.  Falk disclaims  beneficial
    ownership  of the securities  held by Commonwealth  Associates except to the
    extent of  his percentage  ownership interests  in Commonwealth  Associates.
    Shares  and warrants held  directly by Mr.  Falk were transferred  to him by
    Commonwealth  Associates.  Commonwealth   Associates  disclaims   beneficial
    ownership  of such  shares and warrants  and the  underlying warrant shares.
    Such  shares  and  warrants  were  issued  to  Commonwealth  Associates   as
    compensation  for  certain  services  rendered to  the  Company.  The shares
    indicated under the caption "Shares to be Sold in Offering" include  100,000
    shares to be sold by Commonwealth Associates and 25,000 shares to be sold by
    Ms.   Falk  in  the   Offering.  See  "Certain   Relationships  and  Related
    Transactions."
    
 
 (5)  Includes  1,667,078  shares  underlying  warrants  held  by   Commonwealth
    Associates  that are exercisable  currently or within  60 days following the
    Reference Date. Excludes securities held in Commonwealth Associates' trading
    account. See "Certain Relationships and Related Transactions."
 
 (6) Includes 34,895 shares underlying stock options held by Dr. Abeles that are
    exercisable currently  or  within  60 days  following  the  Reference  Date.
    Includes  253,713 shares of  Common Stock held of  record, and 38,049 shares
    underlying warrants exercisable  currently or within  60 days following  the
    Reference  Date,  by  Northlea  Partners Limited,  as  to  which  Dr. Abeles
    disclaims beneficial ownership.
 
   
 (7) Includes 35,800 shares underlying stock  options held by Mr. Halperin  that
    are  exercisable currently or  within 60 days  following the Reference Date.
    Includes 1,968 Performance Shares. See "Management's Discussion and Analysis
    of Financial Condition and Results of Operations."
    
 
   
 (8) Includes 25,000 shares underlying stock options held by Mr. Burke that  are
    exercisable  currently  or  within  60 days  following  the  Reference Date.
    Includes 9,841 Performance Shares. See "Management's Discussion and Analysis
    of Financial Condition and Results of Operations."
    
 
   
 (9) Includes 100,000 shares underlying stock  options and warrants held by  Mr.
    Schiller  that are  exercisable currently  or within  60 days  following the
    Reference Date.
    
 
   
(10) Consists of shares underlying stock  options held by Mr. Lavallee that  are
    exercisable  currently  or  within  60 days  following  the  Reference Date.
    Includes 1,968 Performance Shares. See "Management's Discussion and Analysis
    of Financial Condition and Results of Operations."
    
 
(11) Includes 106,961 shares  underlying stock options held  by Mr. Santor  that
    are exercisable currently or within 60 days following the Reference Date.
 
(12)  Includes 50,000 shares underlying stock  options held by Mr. Pressman that
    are exercisable currently or within 60 days of the Reference Date.
 
   
(13)  Consists  of  shares  underlying  stock  options  or  warrants  that   are
    exercisable currently or within 60 days following the Reference Date.
    
 
   
(14) Includes 527,371 shares underlying warrants or options held by officers and
    directors  that are exercisable currently or within 60 days of the Reference
    Date.
    
 
   
(15) Includes 100,000  shares underlying warrants  held by Mr.  Priddy that  are
    exercisable  currently or within  60 days following  the Reference Date. See
    "Certain Relationships and Related Transactions."
    
 
   
(16) Shares listed as being offered  in the Offering by the Selling  Stockholder
    underlie   currently  exercisable   warrants  transferred   to  the  Selling
    Stockholder by Commonwealth Associates. The Selling Stockholder is currently
    or  was  formerly  associated  with  Commonwealth  Associates.  Commonwealth
    Associates   disclaims  beneficial  ownership  of   such  warrants  and  the
    underlying  warrant  shares.  Such  warrants  were  issued  to  Commonwealth
    Associates as compensation for certain services rendered to the Company. See
    "Certain Relationships and Related Transactions."
    
 
   
(17)  Ms. Falk owns directly warrants to purchase up to 100,000 shares of common
    stock.  The  number  shown  includes  222,222  shares,  and  585,409  shares
    underlying  warrants  that  are  exercisable  currently  or  within  60 days
    following the Reference Date, held by  Ms. Falk's spouse, Michael Falk.  The
    shares  indicated under the caption "Shares  to be Sold in Offering" include
    100,000 shares to be sold  by Mr. Falk in  the Offering. Ms. Falk  disclaims
    beneficial ownership of shares held by Mr. Falk.
    
 
   
(18)  Hultquist Capital LLC served as advisor  to the Company in connection with
    the Merger. See "Certain Relationships and Related Transactions."
    
 
   
(19) Includes 28,097 shares  underlying warrants held by  Mr. Robinson that  are
    exercisable currently or within 60 days following the Reference Date.
    
 
   
(20)  Includes 116,000  shares held  in escrow  in accordance  with an agreement
    between G&G Dispensing, Inc. and the  Company that provides for such  shares
    to  vest upon the achievement by G&G  Dispensing, Inc. of certain goals with
    respect to the
    
 
                                       59
<PAGE>
    development of products for the  Company. See "Description of Capital  Stock
    --   Warrants  --   Privately-Issued  Warrants."   Includes  175,000  shares
    underlying warrants held by G&G Dispensing that are exercisable currently or
    within 60 days following the Reference Date.
 
   
(21) Includes 301,313 shares underlying warrants that are exercisable  currently
    or  within 60  days following  the Reference  Date held  by The  P.L. Thomas
    Group, Inc., of  which Mr. Thomas  may be deemed  the beneficial owner.  The
    shares  indicated under the caption "Shares  to be Sold in Offering" include
    15,500 shares to be sold by The P.L. Thomas Group, Inc. in the Offering. Mr.
    Thomas is the President and sole shareholder of The P.L. Thomas Group, Inc.
    
 
   
(22) Includes 7,895  shares underlying stock  options held by  Mr. Schocken  and
    15,600 shares underlying warrants held by Broadmark Capital Corporation that
    are  exercisable currently or  within 60 days  following the Reference Date.
    Mr. Schocken is President of Broadmark Capital Corporation and may be deemed
    to be the beneficial owner of shares held by Broadmark Capital  Corporation.
    Mr.  Schocken disclaims beneficial ownership of the shares held by Broadmark
    Capital Corporation. The shares  indicated under the  caption "Shares to  be
    Sold  in Offering"  include 15,600  shares to  be sold  by Broadmark Capital
    Corporation in the Offering. Mr. Schocken was a director of the Company from
    November 1992 until April 1995.
    
 
   
(23) Includes 25,000 shares underlying stock options held by Dr. Corbin that are
    exercisable currently or within  60 days following  the Reference Date.  Dr.
    Corbin  was a director of the Company from April 1995 to July 1996. Includes
    1,968 Performance  Shares.  See  "Management's Discussion  and  Analysis  of
    Financial Condition and Results of Operations."
    
 
   
(24)  Mr. Kanter was a director of the  Company from June 1991 through April 21,
    1995.
    
 
   
(25) Mr. Earhart was a  director of the Company  from May 1994 through  December
    29,  1995. Includes  1,968 Performance Shares.  See "Management's Discussion
    and Analysis of Financial Condition and Results of Operations."
    
 
   
(26) Mr. Wilson was a director of the Company from March 1992 through April  21,
    1995.
    
 
   
    The Company has agreed to indemnify the Selling Stockholders and the Selling
Stockholders  have agreed to indemnify the  Company and the Underwriters against
certain civil liabilities, including liabilities under the Securities Act.
    
 
    Except as  noted in  the  footnotes above  and  under the  caption  "Certain
Relationships  and Related Transactions,"  none of the  Selling Stockholders has
held any office  or had any  material relationship with  the Company during  the
past three years.
 
                                       60
<PAGE>
                          DESCRIPTION OF CAPITAL STOCK
 
    The  following  summary  is  a  description  of  certain  provisions  of the
Company's Certificate of Incorporation and Bylaws. Such summary does not purport
to be complete and is  subject to, and is qualified  in its entirety by, all  of
the  provisions of  the Certificate of  Incorporation and  Bylaws, including the
definitions therein of certain terms. Copies of the Certificate of Incorporation
and Bylaws are  filed as exhibits  to the Registration  Statement of which  this
Prospectus forms a part.
 
COMMON STOCK
 
   
    Pursuant  to  the  Company's  Certificate  of  Incorporation,  the  Board of
Directors has the authority to issue up to 30,000,000 shares of Common Stock. As
of August 27, 1996, there were 18,858,736 shares of Common Stock outstanding and
held of record by 260 stockholders. Each  holder of Common Stock is entitled  to
one  vote per share  held of record  on all matters  submitted to a  vote of the
stockholders. There are no cumulative voting or preemptive rights applicable  to
any  shares  of  Common  Stock.  All shares  of  Common  Stock  are  entitled to
participate pro rata in distributions and  in such dividends as may be  declared
by  the Board of Directors  out of funds legally  available therefor, subject to
any preferential dividend rights of  any outstanding shares of Preferred  Stock.
Subject  to  the prior  rights  of creditors,  all  shares of  Common  Stock are
entitled, in the event of liquidation, dissolution or winding up of the Company,
to participate ratably in  the distribution of all  the remaining assets of  the
Company  after  distribution in  full  of preferential  amounts,  if any,  to be
distributed  to  holders  of  Preferred  Stock.  The  rights,  preferences   and
privileges  of holders  of Common  Stock are  subject to,  and may  be adversely
affected by, the rights of  any series of Preferred  Stock that the Company  may
designate and issue in the future.
    
 
PREFERRED STOCK
 
   
    Pursuant  to  the  Company's  Certificate  of  Incorporation,  the  Board of
Directors has  the authority,  without further  action by  the stockholders,  to
issue up to 5,000,000 shares of Preferred Stock in one or more series and to fix
the  designations, powers, preferences,  privileges, and relative participating,
optional or special rights and  the qualifications, limitations or  restrictions
thereof,  including dividend rights, conversion  rights, voting rights, terms of
redemption and liquidation preferences, any or all of which may be greater  than
the  rights of  the Common  Stock. The  Board of  Directors, without stockholder
approval, can issue Preferred Stock with voting, conversion or other rights that
could adversely  affect the  voting power  and other  rights of  the holders  of
Common Stock. Preferred Stock could thus be issued quickly with terms calculated
to  delay or  prevent a  change in  control of  the Company  or make  removal of
management more difficult.  Additionally, the  issuance of  Preferred Stock  may
have  the effect  of decreasing the  market price  of the Common  Stock, and may
adversely affect the voting and other rights of the holders of Common Stock.  At
present,  there are no shares of Preferred Stock outstanding and the Company has
no plans to issue any Preferred Stock.
    
 
WARRANTS
 
   
    As of August 27, 1996, the  Company had outstanding warrants to purchase  up
to  5,917,605  shares of  Common  Stock, including  warrants  to purchase  up to
480,402 shares  to  be  exercised  by  certain  Selling  Stockholders  prior  to
consummation  of the  Offering and  sold in the  Offering, of  which warrants to
purchase 63,472 shares are subject  to forfeiture if certain specified  earnings
per  share  or stock  price  performance thresholds  are  not met  in  1997. See
"Principal and Selling Stockholders."
    
 
  REDEEMABLE WARRANTS
 
   
    Redeemable Warrants to purchase a total of 2,702,705 shares of Common  Stock
are  tradeable on  the Nasdaq  Market under  the symbol  "ACMIW." The Redeemable
Warrants have been approved  for quotation on the  Nasdaq National Market  under
the  symbol "ACMIW,"  subject to  commencement of  the Offering.  The Redeemable
Warrants are exercisable at any time prior  to October 15, 1997, at an  exercise
price  of $5.00 per share. The Redeemable Warrants are redeemable by the Company
at any time prior to their expiration  at a price of $.25 per underlying  share,
provided   that:  (i)  notice  of  not  less  than  60  days  is  given  to  the
warrantholders; (ii) the closing  bid quotation of the  Common Stock on each  of
the 20 trading
    
 
                                       61
<PAGE>
days ending on the third day prior to the date on which the Company gives notice
has  been at  least 150%  (currently $7.50, subject  to adjustment)  of the then
effective  exercise   price  of   the  Redeemable   Warrants;  and   (iii)   the
warrantholders  shall have  exercise rights until  the close of  business on the
date fixed for redemption. The Company  has agreed with the Underwriters not  to
redeem  the Redeemable Warrants for  a period of one year  from the date of this
Prospectus without the consent of the Representatives. See "Underwriting."
 
  PRIVATELY-ISSUED WARRANTS
 
    The Company has  from time  to time issued  warrants to  purchase shares  of
Common  Stock to various  vendors and financial  advisors. Currently outstanding
warrants are as follows:
 
   
    On March 14,  1996, the Company  issued warrants (the  "RADCO Warrants")  to
purchase  up  to an  aggregate  of 687,500  shares  of Common  Stock  to certain
investors as part  of a private  placement of Units  consisting of RADCO  Notes,
RADCO  Stock and RADCO Warrants. Of  the RADCO Warrants, 220,000 are exercisable
at a price of $3.42  per share and 467,500 are  exercisable at a price of  $3.87
per  share (in each case subject to adjustment)  for a period of three years. As
of August 27, 1996, RADCO Warrants to purchase an aggregate of 200,000 shares of
Common Stock  had been  exercised  with aggregate  proceeds  to the  Company  of
$729,000.
    
 
   
    On  January  25, 1996,  the Company  issued  to Robert  Priddy a  warrant to
purchase up to 100,000 shares  of Common Stock exercisable  at a price of  $1.25
per share (subject to adjustment).
    
 
    On  January  18, 1996,  the Company  issued  to The  Research Works,  Inc. a
warrant to purchase up to 100,000 shares of Common Stock exercisable at a  price
of  $2.125 per  share (subject  to adjustment)  for a  period of  five years, in
consideration of  certain research  services  to be  performed by  The  Research
Works,  Inc. A portion of the warrant was first exercisable on January 18, 1996.
The  remaining  portion  of  the  warrant  is  exercisable  in  increments  upon
completion of the second and third research reports by The Research Works, Inc.
 
    On  December 29, 1995, the Company (i) issued to Commonwealth Associates and
certain of its designees warrants to purchase an aggregate of 750,000 shares  of
Common Stock at an exercise price of $1.25 per share (subject to adjustment) for
a  period of five years,  (ii) issued to Commonwealth  Associates and certain of
its designees warrants to  purchase up to 104,000  shares of Common Stock,  from
the  date of issuance  to October 31, 1997,  at an exercise  price of $2.125 per
share (subject to adjustment), and (iii) issued to Leonard Schiller a warrant to
purchase up to 75,000 shares of Common  Stock at an exercise price of $1.13  per
share  for  a  period of  five  years.  See "Certain  Relationships  and Related
Transactions."
 
   
    On December  29, 1995,  the Company  also issued  to The  P.L. Thomas  Group
warrants  to purchase up to an aggregate  of 364,785 shares of Common Stock. One
third of such warrants are exercisable at a price of $0.82 per share, one  third
are exercisable at a price of $1.64 per share and one third are exercisable at a
price of $2.47 per share. Such warrants are exercisable at any time with respect
to  301,313 of the  underlying shares and  with respect to  the remaining 63,472
shares will become exercisable  only if specified earnings  per share and  stock
price performance goals are met during 1997.
    
 
   
    On  September 1, 1995, the Company issued  to AEO warrants to purchase up to
100,000 shares of Common Stock at an exercise price of $0.25 per share  (subject
to  adjustment) for a period  of five years. As of  August 27, 1996, warrants to
purchase an aggregate of 16,500 shares had been exercised.
    
 
    On May 9, 1995, August  14, 1995 and August 22,  1995 the Company issued  to
Commonwealth  Associates and certain of its designees warrants to purchase up to
an aggregate of 564,840 shares  of Common Stock at  an exercise price of  $0.625
per  share (subject  to adjustment)  for a  period of  five years.  See "Certain
Relationships and Related Transactions."
 
   
    On December  31, 1994,  the Company  issued to  Commonwealth Associates  and
certain  of its designees  warrants to purchase  up to 420,000  shares of Common
Stock at an  exercise price of  $0.25 per  share (subject to  adjustment) for  a
period  of five years. As of August  27, 1996, warrants to purchase an aggregate
of 20,000  shares had  been exercised.  See "Certain  Relationships and  Related
Transactions."
    
 
                                       62
<PAGE>
    On  March 29, 1994, the  Company issued to G&G  Dispensing, Inc. warrants to
purchase up to 175,000 shares of Common Stock at an exercise price of $5.00  per
share (subject to adjustment).
 
    On  April 30, 1990,  the Company issued to  AEO a warrant  to purchase up to
25,275 shares of Common Stock at an  exercise price of $5.00 per share  (subject
to adjustment).
 
REGISTRATION RIGHTS
 
   
    The   Company  has   granted  certain  demand   and  so-called  "piggy-back"
registration rights to certain holders of Common Stock and warrants to  purchase
Common  Stock.  In  addition, the  Company  has  offered to  register  under the
Securities Act the offer and resale of certain shares of Common Stock by holders
not contractually entitled  to such  registration. The holders  of such  rights,
many  of whom are Selling Stockholders,  have agreed with the Representatives to
limit the sale of shares of Common Stock  owned by them, other than those to  be
sold in the Offering, during specified periods. In satisfaction of the Company's
obligations  to such holders, the  Company has agreed with  such holders to file
with  the  Securities  and  Exchange  Commission  (the  "Commission")   promptly
following  consummation of  the Offering  a Registration  Statement covering the
offer and resale  of an aggregate  of approximately 6,381,000  shares of  Common
Stock (including shares of Common Stock underlying certain warrants and options)
held  by such  persons, as  to which  holders of  approximately 5,390,000 shares
(including shares underlying  certain warrants  and options)  have entered  into
lock-up  agreements with the Representatives. No  other holders of the Company's
securities are  entitled to  registration rights.  See "Risk  Factors --  Shares
Eligible for Future Sale" and "Underwriting."
    
 
RIGHT OF FIRST REFUSAL IN CERTAIN EQUITY OFFERINGS
 
   
    Pursuant  to a Securities Purchase Agreement  dated May 31, 1996 between the
Company and affiliated purchasers  of an aggregate of  130,000 shares of  Common
Stock,  such purchasers are entitled  to a right of  first refusal in connection
with certain equity  offerings by the  Company from the  date of such  agreement
until  May 31,  1997. Such  right of  first refusal  does not  apply to  (i) the
issuance of securities  pursuant to  an underwritten public  offering, (ii)  the
issuance of securities upon exercise or conversion of options, warrants or other
convertible  securities  outstanding as  of  May 31,  1996,  (iii) the  grant of
additional options or warrants or other securities under a stock option plan  or
restricted stock plan for employees, directors or consultants of the Company, or
any  exercise of options by employees,  directors or consultants, (iv) issuances
of  securities  in  certain  specified  proposed  private  placements,  and  (v)
issuances  of securities in  connection with commercial  banking arrangements, a
merger, consolidation  or  sale of  assets  or strategic  partnership  or  joint
venture  (the primary  purpose of which  is not  to raise equity  capital) or in
connection with the disposition or acquisition of a business, product or license
by the  Company.  If the  Company  proposes  to offer  equity  securities  under
circumstances  other than  as described in  the preceding  sentence, the Company
must give such purchasers written notice  of the proposed offering at least  ten
business  days prior to the proposed closing  date of such offering. During such
ten day period,  such purchasers would  be entitled to  elect to purchase  their
respective  pro rata percentages (determined with reference to the percentage of
such 130,000  shares  purchased by  a  specified purchaser)  of  the  securities
offered on the same terms as the proposed offering.
    
 
TRANSFER AGENT AND REGISTRAR
 
   
    American  Stock Transfer & Trust Company is the transfer agent and registrar
for the Company's Common Stock.
    
 
   
DELAWARE ANTI-TAKEOVER LAW; CERTAIN CHARTER PROVISIONS
    
 
   
    The Company is  subject to  the provisions of  Section 203  of the  Delaware
General  Corporation Law  (the "DGCL"),  an anti-takeover  law. In  general, the
statute prohibits  a  publicly-held  Delaware corporation  from  engaging  in  a
"business  combination" with an  "interested stockholder" for  a period of three
years after the date of the transaction in which the person became an interested
stockholder, unless the business combination is, or the transaction in which the
person became an interested stockholder was, approved in a prescribed manner  or
another  prescribed exemption applies. For purposes  of Section 203, a "business
combination" is  defined  broadly to  include  a  merger, asset  sale  or  other
transaction resulting in
    
 
                                       63
<PAGE>
a  financial benefit to  the interested stockholder.  In general, an "interested
stockholder" is a person who, together with affiliates and associates, owns  (or
within  the three years  prior to such transaction  did own) 15%  or more of the
corporation's voting stock.
 
    In  addition,   certain  provisions   of   the  Company's   Certificate   of
Incorporation  may have the  effect of preventing,  discouraging or delaying any
change in control of  the Company. The  authorization of undesignated  Preferred
Stock makes it possible for the Board of Directors to issue Preferred Stock with
voting  or other  rights or  preferences that  could impede  the success  of any
attempt to change control of the Company. See "-- Preferred Stock."
 
LIMITATION OF LIABILITY AND INDEMNIFICATION
 
    Pursuant to the provisions of the  DGCL, the Company has adopted  provisions
in the Certificate of Incorporation that eliminate the personal liability of its
directors  to the Company or its stockholders for monetary damages for breach of
their fiduciary duty as a director to  the fullest extent permitted by the  DGCL
except  for liability (i) for any breach of their duty of loyalty to the Company
or its stockholders,  (ii) for  acts or  omissions not  in good  faith or  which
involve  intentional  misconduct  or a  knowing  violation of  law,  (iii) under
Section 174  of the  DGCL  (unlawful payments  of  dividends or  unlawful  stock
repurchases or redemptions), or (iv) for any transaction from which the director
derived  an improper  personal benefit.  This provision  also does  not affect a
director's responsibilities under any other laws, such as the federal securities
laws or state or federal environmental laws.
 
   
    The Company's Certificate of Incorporation contains provisions  indemnifying
directors,  officers,  employees  and  agents  of  the  Company  against certain
liabilities that  may  arise  by reason  of  their  status or  service  as  such
directors,  officers,  employees  or  agents.  Insofar  as  indemnification  for
liabilities arising  under the  Securities Act  may be  permitted to  directors,
officers  and  controlling  persons of  the  Company pursuant  to  the foregoing
provisions, or otherwise, the  Company has been advised  that in the opinion  of
the Commission such indemnification is against public policy as expressed in the
Securities Act and is, therefore, unenforceable.
    
 
                                       64
<PAGE>
                                  UNDERWRITING
 
    Subject  to  the terms  and conditions  of  the Underwriting  Agreement, the
underwriters named  below  (the  "Underwriters"),  for  whom  Vector  Securities
International,   Inc.   and   Tucker   Anthony   Incorporated   are   acting  as
Representatives, have  severally agreed  to purchase  from the  Company and  the
Selling  Stockholders, and the Company and  the Selling Stockholders have agreed
to sell to the Underwriters, the following respective number of shares of Common
Stock:
 
<TABLE>
<CAPTION>
                                                                                    NUMBER OF
UNDERWRITERS                                                                         SHARES
- ---------------------------------------------------------------------------------  -----------
<S>                                                                                <C>
Vector Securities International, Inc.............................................
Tucker Anthony Incorporated......................................................
                                                                                   -----------
    Total........................................................................   4,750,000
                                                                                   -----------
                                                                                   -----------
</TABLE>
 
    The Underwriting Agreement provides that the obligations of the Underwriters
are subject  to  certain conditions  precedent,  including the  absence  of  any
material  adverse change  in the Company's  business and the  receipt of certain
certificates, opinions and letters from the Company and its counsel. The  nature
of  the Underwriters' obligation is such that they are committed to purchase all
shares of Common Stock offered hereby if any of such shares are purchased.
 
    The Underwriters propose to offer the  shares of Common Stock to the  public
at the public offering price set forth on the cover page of this Prospectus, and
to  certain dealers at such price less a concession not in excess  of $
per share.  The  Underwriters  may  allow,  and  such  dealers  may  reallow,  a
concession  not in excess of $         per share to certain other dealers. After
the public offering of the shares of Common Stock, the offering price and  other
selling terms may be changed by the Representatives.
 
    The  Company has granted  to the Underwriters an  option, exercisable at any
time during the 30-day period after the date of this Prospectus, to purchase  up
to an additional 712,500 shares of Common Stock at the public offering price set
forth  on the  cover page  of this  Prospectus, less  underwriting discounts and
commissions. The Underwriters may exercise such option solely for the purpose of
covering over-allotments, if any, in connection with the Offering. To the extent
such option is exercised, each Underwriter will be obligated, subject to certain
conditions, to purchase  approximately the  same percentage  of such  additional
shares  as  the  number  of  shares  of Common  Stock  set  forth  next  to such
Underwriter's name in the  preceding table bears to  the total number of  shares
listed in the table.
 
    The  offering of shares is made for delivery when, as and if accepted by the
Underwriters and  subject  to prior  sale  and to  withdrawal,  cancellation  or
modification  of the Offering without notice. The Underwriters reserve the right
to reject an order for the purchase of shares in whole or in part.
 
    The Company  and  the Selling  Stockholders  have agreed  to  indemnify  the
Underwriters  against  certain  liabilities,  including  liabilities  under  the
Securities Act, and to contribute to  payments the Underwriters may be  required
to make in respect thereof.
 
   
    The  Representatives have advised  the Company that  the Underwriters do not
intend to confirm sales  to any account over  which they exercise  discretionary
authority.
    
 
   
    Except  as set forth below, the directors and certain executive officers and
securityholders of the Company, including the Selling Stockholders, have  agreed
that  they will not,  without the prior written  consent of the Representatives,
offer, sell  or otherwise  dispose of  any shares  of Common  Stock, options  or
warrants  to acquire  shares of Common  Stock or securities  exchangeable for or
convertible into shares of  Common Stock owned by  them (other than through  the
Offering) for a period of 270 days after the
    
 
                                       65
<PAGE>
   
date of this Prospectus, except that the holders may (i) after 90 days following
the  date of  this Prospectus, dispose  of one  third of their  shares of Common
Stock, options, warrants  and exchangeable  securities and (ii)  after 180  days
following  the date of  this Prospectus, dispose  of an additional  one third of
their shares of Common Stock, options, warrants and exchangeable securities. Mr.
Gombrich has agreed that he will not,  without the prior written consent of  the
Representatives, offer, sell or otherwise dispose of any shares of Common Stock,
options,  warrants or securities exchangeable for  or convertible into shares of
Common Stock beneficially owned by him  (other than through the Offering) for  a
period  of 270 days after the date of this Prospectus. In addition, Commonwealth
Associates has agreed to the transfer restrictions referred to above, except  as
such restrictions relate to certain warrants held by it. Commonwealth Associates
has agreed that, during the 60 day period following the date of this Prospectus,
it  will  not  offer,  sell  or otherwise  dispose  of  shares  of  Common Stock
underlying Redeemable Warrants to purchase 900,000 shares of Common Stock. There
are no restrictions on transfer of the remaining 77,807 warrants, including  the
underlying  shares, owned by Commonwealth Associates.  AEO and the other holders
of the RADCO Warrants have also agreed  not to offer, sell or otherwise  dispose
of  any shares of Common  Stock underlying the RADCO  Warrants during the 60 day
period following the  date of this  Prospectus. The Company  has agreed that  it
will not, without the prior written consent of the Representatives, offer, sell,
or  otherwise dispose  of any  shares of  Common Stock,  options or  warrants to
acquire shares of  Common Stock  or securities exchangeable  for or  convertible
into  shares of Common  Stock for a  period of 180  days after the  date of this
Prospectus, except that the Company may  (i) grant additional options under  its
stock  options plans, (ii)  issue shares upon the  exercise of outstanding stock
options or warrants  and (iii) issue  up to  100,000 shares of  Common Stock  in
connection  with  an  acquisition  of  assets  or  technology  by  the  Company.
Furthermore, the Company has agreed that it will not, without the prior  written
consent of the Representatives, redeem the Redeemable Warrants prior to one year
following  the date of this Prospectus. See "Risk Factors -- Shares Eligible for
Future Sale."
    
 
                       CHANGE IN INDEPENDENT ACCOUNTANTS
 
    Coopers & Lybrand LLP ("C&L") were previously the principal accountants  for
the Company. On January 15, 1996, C&L's appointment as principal accountants was
terminated  and  the Company  engaged  KPMG Peat  Marwick  LLP as  the Company's
principal accountants. The Company's Board of Directors approved the decision to
change accountants. The opinions of C&L on the balance sheet of AccuMed, Inc. as
of December 31, 1994,  and the statement  of operations, stockholders'  deficit,
and cash flows for the period from February 7, 1994 (inception) through December
31,  1994, the balance  sheets of Alamar  Biosciences, Inc. as  of September 30,
1995 and 1994, and the statements of operations, stockholders' equity, and  cash
flows  for each of the  three years in the period  ended September 30, 1995, and
the balance sheet  of Sensititre/Alamar, the  Microbiology Division of  AccuMed,
Inc.,  as of December 31,  1994 and the statements of  net sales, cost of sales,
and selling expenses for the eight months  ended December 31, 1994 and for  each
of  the two years in the period ended April 30, 1994 did not contain any adverse
opinions or disclaimers or opinions,  or modifications as to uncertainty,  audit
scope or accounting principles, except that for the opinions related to AccuMed,
Inc.  and  Alamar Biosciences,  Inc.,  C&L modified  its  reports to  include an
uncertainty explanatory  paragraph  which  expressed  substantial  doubt  as  to
AccuMed,  Inc.'s and Alamar  Biosciences, Inc.'s ability to  continue as a going
concern. There were no disagreements between  the Company and C&L on any  matter
of  accounting  principles  or  practices,  financial  statement  disclosure, or
auditing scope  or  procedures, which  disagreements,  if not  resolved  to  the
satisfaction  of C&L,  would have  caused it  to make  reference to  the subject
matter of the disagreements in connection with its report.
 
                             AVAILABLE INFORMATION
 
    The Company is subject to the informational requirements of the Exchange Act
and,  in  accordance  therewith,  files  reports,  proxy  statements  and  other
information  with  the  Commission.  Such reports,  proxy  statements  and other
information filed  by the  Company may  be inspected  and copied  at the  public
reference  facilities maintained  by the Commission  at 450  Fifth Street, N.W.,
Room 1024, Washington, D.C.  20549, and at the  following regional offices:  New
York Regional Office, 7 World Trade Center, Room 1400,
 
                                       66
<PAGE>
   
New  York, New York 10048 and Chicago  Regional Office, 500 West Madison Street,
Suite 1400,  Chicago,  Illinois 60661.  Copies  of  such material  may  also  be
obtained  from  the Public  Reference  Section of  the  Commission at  450 Fifth
Street, N.W., Washington, D.C. 20549,  at prescribed rates. The Commission  also
maintains  a site on the World Wide Web that contains reports, proxy statements,
information statements and other information regarding companies that file  such
documents   with  the   Commission  electronically.   The  website   address  is
http://www.sec.gov. The Common Stock is quoted on the Nasdaq Market and  reports
and  other information  regarding the Company  may be inspected  at the National
Association of Securities Dealers, Inc. at 1735 K Street, N.W., Washington, D.C.
20006.
    
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
   
    The following documents which have heretofore been filed by the Company with
the Commission pursuant to the Exchange Act are incorporated by reference herein
and shall be deemed to be a part hereof:
    
 
    (1) The Company's Annual Report on Form 10-KSB for the year ended  September
       30, 1995.
 
    (2)  The Company's Current Report  on Form 8-K filed  with the Commission on
       January 16, 1996.
 
    (3) The Company's Current  Report on Form 8-K  filed with the Commission  on
       January 17, 1996.
 
    (4)  The Company's Current Report  on Form 8-K filed  with the Commission on
       January 19, 1996.
 
    (5) The Company's Amendment No. 1 to the Current Report on Form 8-K/A  filed
       with the Commission on January 24, 1996.
 
    (6) The Company's Transition Report on Form 10-KSB for the transition period
       ended December 31, 1995.
 
    (7)  The Company's  Quarterly Report  on Form  10-QSB for  the quarter ended
       March 31, 1996.
 
   
    (8) The Company's Quarterly Report on Form 10-QSB for the quarter ended June
       30, 1996.
    
 
   
    (9) The description of Common Stock contained in the Company's  Registration
       Statement  on Form 8-A filed with the Commission on September 18, 1992 by
       which the Common Stock of the Company was registered under Section 12  of
       the  Exchange Act, and  the description of  the Common Stock incorporated
       therein by reference to the Registration Statement on Form S-1 (Reg.  No.
       33-48302)  filed with the Commission on June  3, 1992 and amended on June
       25, 1992,  July  23, 1992  and  September  10, 1992,  under  the  caption
       "Description of Securities" therein.
    
 
   
    (10)  The  description  of  the  Common  Stock  contained  in  the Company's
       Amendment No. 1 to  Registration Statement on Form  8-A/A filed with  the
       Commission on January 2, 1996.
    
 
   
    All  documents filed by the Company pursuant to Sections 13(a), 13(c), 14 or
15(d) of the Exchange Act,  after the date of this  Prospectus and prior to  the
termination  of the Offering, shall be deemed to be incorporated by reference in
this Prospectus  and to  be  a part  hereof  from the  date  of filing  of  such
documents.  Any statement incorporated by reference herein shall be deemed to be
modified or superseded  for purposes  of this Prospectus  to the  extent that  a
statement  contained herein, or  in any other  subsequently filed document which
also is  or  is deemed  to  be incorporated  by  reference herein,  modifies  or
supersedes  such statement. Any statement so modified or superseded shall not be
deemed, except  as so  modified or  superseded,  to constitute  a part  of  this
Prospectus.
    
 
    The  Company  will  provide, without  charge  to  each person  to  whom this
Prospectus is delivered, upon written or oral  request, a copy of any or all  of
the  documents  incorporated  by  reference in  this  Prospectus  (not including
exhibits and  other information  that is  incorporated by  reference unless  the
exhibits  are themselves  specifically incorporated by  reference). Requests for
such documents should be directed to AccuMed International, Inc., located at 900
North Franklin  Street, Suite  401, Chicago,  Illinois 60610,  Attention:  Chief
Financial Officer, telephone (312) 642-9200.
 
                                       67
<PAGE>
                             ADDITIONAL INFORMATION
 
   
    Additional  information  regarding the  Company  and the  securities offered
hereby is  contained  in  the  Registration Statement  on  Form  S-2  (Reg.  No.
333-09011) of which this Prospectus forms a part, and the exhibits thereto filed
with the Commission under the Securities Act. For further information pertaining
to  the Company  and the  securities offered  hereby, reference  is made  to the
Registration Statement and the exhibits thereto, which may be inspected  without
charge at, and copies may be obtained at prescribed fees from, the office of the
Commission at 450 Fifth Street, N.W., Washington, D.C. 20549.
    
 
    The  Company furnishes  stockholders with annual  reports containing audited
financial statements and other  periodic reports as the  Company may deem to  be
appropriate,  or as required by law or  the rules of the National Association of
Securities Dealers, Inc.
 
                                 LEGAL MATTERS
 
    The legality of  the securities offered  by this Prospectus  will be  passed
upon  for  the Company  and  the Selling  Stockholders  by Graham  &  James LLP,
Sacramento, California. Certain partners in Graham & James LLP own an  aggregate
of  1,458 shares  of Common Stock  and 1,000 Redeemable  Warrants. Certain legal
matters relating to  the Offering will  be passed upon  for the Underwriters  by
Skadden, Arps, Slate, Meagher & Flom, Chicago, Illinois.
 
                                    EXPERTS
 
   
    The  balance  sheet  of  AccuMed,  Inc as  of  December  31,  1994,  and the
statements of operations, stockholders' deficit,  and cash flows for the  period
from  February 7, 1994 (inception) through December 31, 1994, the balance sheets
of Alamar Biosciences, Inc. as of  September 30, 1995 and 1994, incorporated  by
reference  in this Prospectus,  and the statements  of operations, stockholders'
equity, and cash flows for each of the three years in the period ended September
30,  1995,   included   in  this   Prospectus,   and  the   balance   sheet   of
Sensititre/Alamar,  the Microbiology Division  of AccuMed, Inc.,  as of December
31, 1994 and the statements  of net sales, cost  of sales, and selling  expenses
for  the eight months ended December  31, 1994 and for each  of the two years in
the period ended April 30, 1994,  incorporated by reference in this  Prospectus,
have  been so included or incorporated by  reference in reliance on the reports,
which included  explanatory paragraphs  related to  AccuMed, Inc.'s  and  Alamar
Biosciences,  Inc.'s ability to continue as going concerns, of C&L, given on the
authority of said firm as experts in accounting and auditing.
    
 
   
    The balance sheets of AccuMed International Limited as of December 31, 1994,
April 30, 1994 and 1993, and the statements of operations and cash flows for the
eight months ended  December 31,  1994, and  for each of  the two  years in  the
period  ended April 30,  1994, as incorporated by  reference in this Prospectus,
have been  included herein  in  reliance on  the report  of  C&L, given  on  the
authority of said firm as experts in accounting and auditing.
    
 
    The  consolidated financial  statements of  AccuMed International,  Inc. and
subsidiaries as of December  31, 1995, and for  the three months ended  December
31,  1995, included in this Prospectus and incorporated herein by reference from
the Company's Transition Report on Form 10-KSB for the three month period  ended
December 31, 1995 have been so included or incorporated by reference in reliance
upon  the  report  of  KPMG  Peat  Marwick  LLP,  independent  certified  public
accountants ("KPMG"),  and  upon  the  authority of  said  firm  as  experts  in
accounting and auditing.
 
    The financial statements of Oncometrics Imaging Corp. as of August 31, 1995,
December  31, 1995 and May 31, 1996, and for the year ended August 31, 1995, for
the four months ended December  31, 1995 and for the  five months ended May  31,
1996,  included in this Prospectus,  have been so included  in reliance upon the
report of KPMG, chartered  accountants, and upon the  authority of said firm  as
experts in accounting and auditing.
 
    Statements in this Prospectus under the captions "Risk Factors -- Protection
of  Intellectual Property" and  "Business -- Intellectual  Property," insofar as
they relate to patent matters, other than with
 
                                       68
<PAGE>
   
respect to  certain  matters  in  connection  with  the  Company's  microbiology
technology,  have  been  reviewed and  approved  by Banner  &  Allegretti, Ltd.,
special patent counsel to the Company, and have been included herein in reliance
upon the review and approval by such firm as experts in patent law.
    
 
    Statements in this Prospectus under the captions "Risk Factors -- Protection
of Intellectual Property"  and "Business --  Intellectual Property," insofar  as
they  relate  to  patent  matters in  connection  with  the  Alamar microbiology
technology and the trade secret litigation  which occurred from late 1994  until
early  1996, have been reviewed  and approved by Townsend  and Townsend and Crew
LLP, special patent  counsel to the  Company, and have  been included herein  in
reliance upon the review and approval by such firm as experts in patent law.
 
                                       69
<PAGE>
                         INDEX TO FINANCIAL STATEMENTS
 
   
<TABLE>
<CAPTION>
                                                                                                               PAGE
                                                                                                             ---------
<S>                                                                                                          <C>
ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
  Independent Auditors' Report.............................................................................        F-2
  Independent Accountants' Report..........................................................................        F-3
  Consolidated Balance Sheets as of September 30, 1995, December 31, 1995 and June 30, 1996 (unaudited)....        F-4
  Consolidated Statements of Operations for the years ended September 30, 1994 and 1995, for the three
   months ended December 31, 1995 and for the six months ended June 30, 1996 (unaudited)...................        F-5
  Consolidated Statements of Stockholders' Equity for the years ended September 30, 1994 and 1995, for the
   three months ended December 31, 1995 and for the six months ended June 30, 1996 (unaudited).............        F-6
  Consolidated Statements of Cash Flows for the years ended September 30, 1994 and 1995, for the three
   months ended December 31, 1995 and for the six months ended June 30, 1996 (unaudited)...................        F-7
  Notes to Consolidated Financial Statements...............................................................        F-8
ONCOMETRICS IMAGING CORP.
  Auditors' Report.........................................................................................       F-23
  Balance Sheets as of August 31, 1995, December 31, 1995 and May 31, 1996.................................       F-24
  Statements of Operations and Deficit for the year ended August 31, 1995, for the four months ended
   December 31, 1995 and for the five months ended May 31, 1996............................................       F-25
  Statements of Changes in Financial Position for the year ended August 31, 1995, for the four months ended
   December 31, 1995 and for the five months ended May 31, 1996............................................       F-26
  Notes to Financial Statements............................................................................       F-27
PRO FORMA CONDENSED COMBINING FINANCIAL STATEMENTS (UNAUDITED)
  Pro Forma Condensed Combining Balance Sheet as of June 30, 1996..........................................       F-31
  Pro Forma Condensed Combining Statement of Operations for the six months ended
   June 30, 1996...........................................................................................       F-32
  Pro Forma Condensed Combining Statement of Operations for the three months ended December 31, 1995.......       F-33
  Pro Forma Condensed Combining Statement of Operations for the year ended September 30, 1995..............       F-34
  Notes to Pro Forma Condensed Combining Financial Statements..............................................       F-35
</TABLE>
    
 
                                      F-1
<PAGE>
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors and Stockholders
AccuMed International, Inc.:
 
    We  have  audited the  accompanying  consolidated balance  sheet  of AccuMed
International, Inc. and subsidiaries  as of December 31,  1995, and the  related
consolidated  statements of operations, stockholders' equity, and cash flows for
the  three  months  ended  December  31,  1995.  These  consolidated   financial
statements   are   the   responsibility  of   the   Company's   management.  Our
responsibility  is  to  express  an  opinion  on  these  consolidated  financial
statements based on our audit.
 
    We  conducted  our  audit  in accordance  with  generally  accepted auditing
standards. Those standards require that we plan and perform the audit to  obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also  includes
assessing  the  accounting principles  used  and significant  estimates  made by
management, as well as evaluating the overall financial statement  presentation.
We believe that our audit provides a reasonable basis for our opinion.
 
    In  our  opinion, the  consolidated financial  statements referred  to above
present fairly,  in all  material respects,  the financial  position of  AccuMed
International, Inc. and subsidiaries as of December 31, 1995, and the results of
their  operations and their cash  flows for the three  months ended December 31,
1995, in conformity with generally accepted accounting principles.
 
                                          /s/ KPMG PEAT MARWICK LLP
 
Chicago, Illinois
April 5, 1996
 
                                      F-2
<PAGE>
                        INDEPENDENT ACCOUNTANTS' REPORT
 
The Stockholders
Alamar Biosciences, Inc.
 
    We have audited the accompanying balance sheet of Alamar Biosciences,  Inc.,
as  of September  30, 1995 and  related statements  of operations, stockholders'
equity, and cash flows for  the years ended September  30, 1994 and 1995.  These
financial  statements are  the responsibility  of the  Company's management. Our
responsibility is to express an opinion  on these financial statements based  on
our audits.
 
    We  conducted  our audits  in  accordance with  generally  accepted auditing
standards. Those standards require that we plan and perform the audits to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence  supporting
the  amounts and disclosures in the financial statements. An audit also includes
assessing the  accounting  principles used  and  significant estimates  made  by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provided a reasonable basis for our opinion.
 
    In our opinion, the financial  statements referred to above present  fairly,
in all material respects, the financial position of Alamar Biosciences, Inc., at
September 30, 1995, and the results of its operations and its cash flows for the
years  ended September 30, 1994 and  1995, in conformity with generally accepted
accounting principles.
 
    The accompanying financial statements have  been prepared assuming that  the
Company will continue as a going concern. As discussed in Note 3, the Company is
involved  in  litigation and  is proposing  to merge  with another  company. The
Company has taken certain  actions to meet cash  flow requirements, including  a
reduction  in work force,  overhead and product  development, until the disputes
can be resolved. There can be no assurance that the Company's efforts related to
the lawsuits will  be successful. In  addition, there can  be no assurance  that
combined  operations of the proposed merger will produce the necessary cash flow
required. These factors raise substantial  doubt about the Company's ability  to
continue  as  a  going concern.  The  financial  statements do  not  include any
adjustments that might be necessary  if the Company is  unable to continue as  a
going concern.
 
                                          /s/ COOPERS & LYBRAND L.L.P.
 
Sacramento, California
November 19, 1995
 
                                      F-3
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
 
                          CONSOLIDATED BALANCE SHEETS
 
   
<TABLE>
<CAPTION>
                                                                    SEPTEMBER 30,    DECEMBER 31,
                                                                         1995            1995
                                                                    --------------  --------------  JUNE 30, 1996
                                                                                                    --------------
                                                                                                     (UNAUDITED)
<S>                                                                 <C>             <C>             <C>
ASSETS
 
Current assets:
  Cash and cash equivalents.......................................  $      716,211  $      180,508  $      595,265
  Restricted cash.................................................         185,000         363,000              --
  Accounts receivable.............................................         245,092         874,712       1,405,486
  Prepaid expenses and deposits...................................          73,260         124,836         231,194
  Production inventory............................................         314,006       1,143,120       1,513,760
                                                                    --------------  --------------  --------------
      Total current assets........................................       1,533,569       2,686,176       3,745,705
                                                                    --------------  --------------  --------------
Fixed assets, net.................................................         411,126         528,402         401,970
Notes receivable..................................................         700,000              --              --
Deferred merger costs.............................................         299,650              --              --
Intangible assets.................................................              --       2,644,556       4,403,677
Other assets......................................................          44,621         115,069         168,402
                                                                    --------------  --------------  --------------
                                                                    $    2,988,966  $    5,974,203  $    8,719,754
                                                                    --------------  --------------  --------------
                                                                    --------------  --------------  --------------
 
LIABILITIES AND STOCKHOLDERS' EQUITY
 
Current liabilities:
  Accounts payable................................................  $    1,017,103  $    2,005,861  $    2,242,433
  Other current liabilities.......................................         203,497         870,313         772,465
  Deferred revenue................................................         470,238       1,454,450          35,358
  Notes payable...................................................              --         726,514          37,497
  Capital lease obligations due within one year...................          89,406          88,270          86,067
                                                                    --------------  --------------  --------------
      Total current liabilities...................................       1,780,244       5,145,408       3,173,820
                                                                    --------------  --------------  --------------
Long-term portion of capital lease obligations....................         110,806          89,810          45,243
Deferred rent.....................................................              --          10,278          13,393
Stockholders' equity:
  Common stock, $.01 par value, 30,000,000 shares authorized,
   10,929,339 shares issued and outstanding at September 30, 1995,
   15,571,184 at December 31, 1995 and 17,525,748 at June 30,
   1996...........................................................         109,293         155,712         175,257
  Additional paid in capital......................................      18,008,086      23,334,495      32,694,471
  Cumulative translation adjustment...............................              --              --          (2,236)
  Accumulated deficit.............................................     (17,019,463)    (22,761,500)    (27,380,194)
                                                                    --------------  --------------  --------------
      Total stockholders' equity..................................       1,097,916         728,707       5,487,298
                                                                    --------------  --------------  --------------
                                                                    $    2,988,966  $    5,974,203  $    8,719,754
                                                                    --------------  --------------  --------------
                                                                    --------------  --------------  --------------
</TABLE>
    
 
          See accompanying notes to consolidated financial statements.
 
                                      F-4
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
   
<TABLE>
<CAPTION>
                                         YEARS ENDED SEPTEMBER 30,    THREE MONTHS
                                         --------------------------  ENDED DECEMBER
                                             1994          1995         31, 1995
                                         ------------  ------------  --------------  SIX MONTHS ENDED JUNE 30,
                                                                                     --------------------------
                                                                                         1995          1996
                                                                                     ------------  ------------
                                                                                     (UNAUDITED)   (UNAUDITED)
<S>                                      <C>           <C>           <C>             <C>           <C>
Sales..................................  $  1,161,822  $    514,776   $    100,130   $    320,505  $  2,312,094
Cost of sales..........................    (1,549,350)   (1,431,187)      (338,730)      (471,065)   (1,465,457)
                                         ------------  ------------  --------------  ------------  ------------
Gross profit (loss)....................      (387,528)     (916,411)      (238,600)      (150,560)      846,637
                                         ------------  ------------  --------------  ------------  ------------
Operating expenses:
  General and administrative...........     1,219,249     2,094,890      1,418,797        860,253     1,951,491
  Research and development.............       580,180       386,882      3,997,600        139,842     4,789,412
  Sales and marketing..................       959,519       309,208          7,197         74,959       841,565
                                         ------------  ------------  --------------  ------------  ------------
      Total operating expenses.........     2,758,948     2,790,980      5,423,594      1,075,054     7,582,468
                                         ------------  ------------  --------------  ------------  ------------
Operating loss.........................    (3,146,476)   (3,707,391)    (5,662,194)    (1,225,614)   (6,735,831)
                                         ------------  ------------  --------------  ------------  ------------
Other income (expense):
  Interest income......................        46,624         7,949          4,748          2,693        11,460
  Interest expense.....................       (12,836)      (46,657)       (10,862)       (25,973)     (437,986)
  Other................................           298       (13,211)       (72,929)        95,734     2,544,513
                                         ------------  ------------  --------------  ------------  ------------
      Total other income (expense).....        34,086       (51,919)       (79,043)       (72,454)    2,117,987
                                         ------------  ------------  --------------  ------------  ------------
Loss before income taxes...............    (3,112,390)   (3,759,310)    (5,741,237)    (1,153,160)   (4,617,844)
Income tax expense.....................           800           800            800            400           850
                                         ------------  ------------  --------------  ------------  ------------
      Net loss.........................  $ (3,113,190) $ (3,760,110)  $ (5,742,037)  $ (1,153,560) $ (4,618,694)
                                         ------------  ------------  --------------  ------------  ------------
                                         ------------  ------------  --------------  ------------  ------------
Net loss per share.....................  $      (0.65) $      (0.59)  $      (0.49)  $      (0.20) $      (0.28)
                                         ------------  ------------  --------------  ------------  ------------
                                         ------------  ------------  --------------  ------------  ------------
Weighted average common shares
 outstanding...........................     4,776,139     6,375,627     11,742,980      5,653,437    16,319,105
                                         ------------  ------------  --------------  ------------  ------------
                                         ------------  ------------  --------------  ------------  ------------
</TABLE>
    
 
          See accompanying notes to consolidated financial statements.
 
                                      F-5
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
 
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
 
   
<TABLE>
<CAPTION>
                                             COMMON STOCK        ADDITIONAL                  CUMULATIVE        TOTAL
                                        -----------------------    PAID-IN    ACCUMULATED    TRANSLATION   STOCKHOLDERS'
                                          SHARES      AMOUNT       CAPITAL      DEFICIT      ADJUSTMENT       EQUITY
                                        ----------  -----------  -----------  ------------  -------------  -------------
<S>                                     <C>         <C>          <C>          <C>           <C>            <C>
Balances at September 30, 1993........   4,710,553  $    47,106  $14,243,494  ($10,146,163)          --     $ 4,144,437
Issuances of common stock:
  November 1993 at $0.80..............       3,491           35        2,758           --            --           2,793
  December 1993 at $0.80..............       1,250           12          988           --            --           1,000
  December 1993 at $2.50..............      50,000          500      124,500           --            --         125,000
  March 1994 at $2.07.................      29,000          290       59,710           --            --          60,000
  August 1994 at $2.50................      50,000          500      124,500           --            --         125,000
Net loss..............................          --           --           --   (3,113,190)           --      (3,113,190)
                                        ----------  -----------  -----------  ------------  -------------  -------------
Balances at September 30, 1994........   4,844,294       48,443   14,555,950  (13,259,353)           --       1,345,040
                                        ----------  -----------  -----------  ------------  -------------  -------------
Issuances of common stock:
  November 1994 at $2.50..............     100,000        1,000      249,000           --            --         250,000
  March 1995 at $0.62.................      80,645          807       41,693           --            --          42,500
  May 1995 at $.625...................   2,648,400       26,484    1,369,115           --            --       1,395,599
  August 1995 at $.625................   3,000,000       30,000    1,505,887           --            --       1,535,887
  August 1995 at $.625................     240,000        2,400      128,100           --            --         130,500
  August 1995 at $1.00................      16,000          160       15,840           --            --          16,000
Issuances of warrants.................          --           --      142,500           --            --         142,500
Net loss..............................          --           --           --   (3,760,110)           --      (3,760,110)
                                        ----------  -----------  -----------  ------------  -------------  -------------
Balances at September 30, 1995........  10,929,339      109,294   18,008,085  (17,019,463)           --       1,097,916
                                        ----------  -----------  -----------  ------------  -------------  -------------
Issuances of common stock:
  October 1995 at $0.625..............      50,000          500       30,750           --            --          31,250
  November 1995 at $0.625.............      20,000          200       12,300           --            --          12,500
  December 1995 at $1.125.............   4,431,845       44,318    4,941,508           --            --       4,985,826
Issuance of warrants..................          --           --      308,252           --            --         308,252
Warrants exercised December 1995 @
 $0.25................................     140,000        1,400       33,600           --            --          35,000
Net loss..............................          --           --           --   (5,742,037)           --      (5,742,037)
                                        ----------  -----------  -----------  ------------  -------------  -------------
Balances at December 31, 1995.........  15,571,184      155,712   23,334,495  (22,761,500)           --         728,707
                                        ----------  -----------  -----------  ------------  -------------  -------------
Issuances of common stock (unaudited):
  January 1996 at $1.125..............      60,000          600       66,900           --            --          67,500
  March 1996 at $5.50.................     940,955        9,410    5,165,842           --            --       5,175,252
  May 1996 at $8.125..................       3,750           37       30,432           --            --          30,469
  June 1996 at $6.00..................     255,000        2,550    1,407,115           --            --       1,409,665
Issuances of warrants (unaudited).....          --           --    1,689,464           --            --       1,689,464
Stock options exercised (unaudited):
  March 1996 at $0.63.................       7,895           78        4,896           --            --           4,974
  March 1996 at $1.39.................       5,000           50        6,900           --            --           6,950
  May 1996 at $0.63...................      17,765          178       11,014           --            --          11,192
  May 1996 at $0.75...................       6,690           67        4,950           --            --           5,017
  May 1996 at $1.13...................       9,333           93       10,453           --            --          10,546
  May 1996 at $1.39...................      98,153          981      135,452           --            --         136,433
  June 1996 at $0.63..................       7,895           79        4,895           --            --           4,974
  June 1996 at $1.13..................      19,167          192       21,467           --            --          21,659
  June 1996 at $1.39..................     202,375        2,024      279,277           --            --         281,301
Warrants exercised (unaudited):
  January 1996 at $0.25...............      17,500          175        4,200           --            --           4,375
  March 1996 at $0.25.................       2,500           25          600           --            --             625
  April 1996 at $0.25.................       9,000           90        2,160           --            --           2,250
  May 1996 at $3.42...................     100,000        1,000      341,000           --            --         342,000
  June 1996 at $3.87..................      25,000          250       96,500           --            --          96,750
Conversion of debt (unaudited)........     166,586        1,666       76,459           --            --          78,125
Cumulative translation adjustment
 (unaudited)..........................          --           --           --           --        (2,236)         (2,236)
Net loss (unaudited)..................          --           --           --   (4,618,694)           --      (4,618,694)
                                        ----------  -----------  -----------  ------------  -------------  -------------
  Balances at June 30, 1996
   (unaudited)........................  17,525,748  $   175,257  $32,694,471  ($27,380,194)   $  (2,236)    $ 5,487,298
                                        ----------  -----------  -----------  ------------  -------------  -------------
                                        ----------  -----------  -----------  ------------  -------------  -------------
</TABLE>
    
 
          See accompanying notes to consolidated financial statements.
 
                                      F-6
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
   
<TABLE>
<CAPTION>
                                              YEARS ENDED SEPTEMBER
                                                       30,              THREE MONTHS
                                             ------------------------  ENDED DECEMBER
                                                1994         1995         31, 1995
                                             -----------  -----------  --------------      SIX MONTHS ENDED
                                                                                               JUNE 30,
                                                                                       ------------------------
                                                                                          1995         1996
                                                                                       -----------  -----------
                                                                                       (UNAUDITED)  (UNAUDITED)
<S>                                          <C>          <C>          <C>             <C>          <C>
Cash flows from operating activities:
  Net loss.................................  $(3,113,190) $(3,760,110)  $ (5,742,037)  ($1,151,402) ($4,618,694)
  Adjustments to reconcile net loss to net
   cash used in operating activities:
    Depreciation and amortization..........      216,603      235,529         38,400      123,066      704,465
    Write-off of acquired in-process
     research and development..............           --           --      3,965,000           --    3,499,727
    Expenses paid with issuance of common
     stock.................................       60,000      166,000        606,750           --       33,594
    Expenses paid with issuance of
     warrants..............................           --      142,500             --           --    1,184,390
    Loss on disposal of assets.............           --       63,609             --      (19,810)      74,706
    Changes in assets and liabilities:
      Restricted cash......................           --     (185,000)      (178,000)          --      363,000
      Accounts receivable..................     (389,087)     271,145        107,906      121,650     (531,403)
      Prepaid expenses and deposits........       44,417       20,035          1,833       14,606     (106,358)
      Production inventory.................     (338,395)     193,796         64,999       86,740     (371,877)
      Other assets.........................           --       (1,525)        80,059      (63,728)     (57,584)
      Accounts payable.....................       52,762      766,900        168,460       93,535      237,548
      Other current liabilities............       53,150        8,571        155,941        4,970      (94,588)
      Deferred merger costs................           --     (299,650)      (750,352)          --           --
      Deferred revenue.....................           --      470,238        946,429           --   (1,419,092)
                                             -----------  -----------  --------------  -----------  -----------
      Net cash used in operating
       activities..........................   (3,413,740)  (1,907,962)      (534,612)    (790,373)  (1,102,166)
                                             -----------  -----------  --------------  -----------  -----------
Cash flows from investing activities:
  Purchase of fixed assets.................      (42,657)     (49,834)       (62,196)      (1,354)    (202,010)
  Acquisition of business, net.............           --           --         48,237           --           --
  Proceeds from refundable deposits........           --           --             --      400,000           --
                                             -----------  -----------  --------------  -----------  -----------
    Net cash provided by (used in)
     investment activities.................      (42,657)     (49,834)       (13,959)     398,646     (202,010)
                                             -----------  -----------  --------------  -----------  -----------
Cash flows from financing activities:
  Proceeds from issuance of common stock,
   net.....................................      253,793    3,204,486         35,000    1,438,099    2,406,211
  Proceeds from issuance of notes
   payable.................................           --           --             --           --      250,000
  Notes receivable issued..................           --     (700,000)            --     (350,000)          --
  Payment of notes payable.................           --           --             --           --     (889,017)
  Payment of capital lease obligation......      (32,312)     (50,115)       (22,132)     (34,340)     (46,770)
                                             -----------  -----------  --------------  -----------  -----------
    Net cash provided by financing
     activities............................      221,481    2,454,371         12,868    1,053,759    1,720,424
                                             -----------  -----------  --------------  -----------  -----------
Effect of exchange rate changes to cash....           --           --             --           --       (1,491)
                                             -----------  -----------  --------------  -----------  -----------
Net increase (decrease) in cash and cash
 equivalents...............................   (3,234,916)     496,575       (535,703)    (662,032)     414,757
Cash and cash equivalents at beginning of
 period....................................    3,454,552      219,636        716,211       42,173      180,508
                                             -----------  -----------  --------------  -----------  -----------
Cash and cash equivalents at end of
 period....................................  $   219,636  $   716,211   $    180,508    $ 704,205    $ 595,265
                                             -----------  -----------  --------------  -----------  -----------
                                             -----------  -----------  --------------  -----------  -----------
</TABLE>
    
 
          See accompanying notes to consolidated financial statements.
 
                                      F-7
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS
 
1.  DESCRIPTION OF BUSINESS
    AccuMed International, Inc. and subsidiaries develop, manufacture and market
state-of-the-art medical devices and instruments for laboratories, hospitals and
others.  The Company was founded in January  1988, incorporated in June 1988 and
reincorporated in Delaware in 1995.
 
2.  SIGNIFICANT ACCOUNTING POLICIES
 
  PRINCIPLES OF CONSOLIDATION
 
    The consolidated  financial  statements  include  the  accounts  of  AccuMed
International,   Inc.  and   its  subsidiary   ("the  Company")(formerly  Alamar
Biosciences, Inc.). All significant intercompany accounts and transactions  have
been eliminated in consolidation.
 
  REVENUE RECOGNITION
 
    The  Company recognizes revenue from sale  of products when the products are
shipped to its customers. Contract revenue from research agreements is  recorded
when  earned and as the related costs  are incurred. Payments received which are
related to future performance are deferred and recognized as revenue when earned
over future performance periods.
 
  CASH AND CASH EQUIVALENTS
 
    Cash and cash equivalents include  cash in banks and short-term  investments
with original maturities of three months or less.
 
  RESTRICTED CASH
 
    The  restricted  cash  as  of  December 31,  1995  consists  of  $310,000 of
certificates of deposit with maturities less than one year which were placed  as
collateral against a loan made by a financial institution and $53,000 held in an
escrow account.
 
    Restricted  cash  as of  September 30,  1995 includes  an escrow  deposit of
$150,000 pursuant to an agreement entered  into in 1995 between the Company  and
an  outside legal counsel to the Company.  Pursuant to the agreement the Company
issued to their counsel 240,000 shares of common stock, net of issuance costs of
$19,500, in exchange for a reduction of $150,000 in accounts payable. The escrow
deposits were released in proportion to the amounts realized by the counsel from
the sale of such shares  in the public market. As  of December 31, 1995  $97,000
had been released from the escrow account with the remaining $53,000 released in
February 1996.
 
  INVENTORIES
 
    Inventories  consist primarily of  raw materials and  finished goods and are
stated at the lower of cost (average cost) or market. Cost is determined by  the
first-in first-out method (FIFO).
 
  FIXED ASSETS
 
    Fixed  assets are  stated at  cost. Depreciation  of plant  and equipment is
provided using the straight line method  over the estimated useful lives of  the
assets.  Amortization of leasehold improvements is provided on the straight-line
method over the shorter of the estimated  useful life of the improvement or  the
term  of  the lease.  Expenditures for  repairs and  maintenance are  charged to
operations when incurred.
 
  INTANGIBLE ASSETS
 
    Intangible assets  consists  principally  of  values  assigned  to  acquired
proprietary  technology and the excess of cost over the fair value of net assets
acquired. Such amounts  are being amortized  on a straight-line  basis over  the
expected  periods to be benefited, generally  10 years. The Company assesses the
 
                                      F-8
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
2.  SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
recoverability of the excess of cost over the fair value of net assets  acquired
by  determining whether the amortization of  the balance over its remaining life
can be  recovered  through  undiscounted  future operating  cash  flows  of  the
acquired operation.
 
  RESEARCH AND DEVELOPMENT COSTS
 
    Research and development costs are charged to operations as incurred.
 
  INCOME TAXES
 
    Deferred  tax  assets  and liabilities  are  recognized for  the  future tax
consequences attributable  to the  difference  between the  financial  statement
carrying  amount of  existing assets  and liabilities  and their  respective tax
bases and operating loss and tax  credit carryforwards. Deferred tax assets  and
liabilities  are measured using  enacted tax rates expected  to apply to taxable
income in the  years in  which those temporary  differences are  expected to  be
recovered  or settled. The  effect on deferred  tax assets and  liabilities of a
change in tax  rates is recognized  in income  in the period  that includes  the
enactment date.
 
  NET LOSS PER SHARE
 
    Net  loss per share is computed using  the weighted average number of common
shares outstanding  during  each period.  Common  equivalent shares  from  stock
options  and  warrants are  excluded  from the  computation  as their  effect is
antidilutive.
 
  USE OF ESTIMATES
 
    Management of the  Company has made  a number of  estimates and  assumptions
relating  to  the reporting  of  assets and  liabilities  and the  disclosure of
contingent assets  and  liabilities to  prepare  these financial  statements  in
conformity  with generally accepted accounting  principles. Actual results could
differ from those estimates.
 
  INTERIM FINANCIAL STATEMENTS
 
   
    The consolidated  financial statements  as of  June 30,  1995 and  1996  are
unaudited. In the opinion of
management,   the  unaudited  consolidated   financial  statements  contain  all
adjustments (consisting  of  only  normal recurring  adjustments)  necessary  to
present  fairly  the  financial  position and  results  of  operations  for such
periods.  Results  of  operations  for  interim  periods  are  not   necessarily
indicative of results that will be achieved for the entire year.
    
 
3.  BASIS OF PRESENTATION FOR THE FISCAL YEARS ENDED SEPTEMBER 30, 1994 AND 1995
    In  November 1994,  the Company  filed a  lawsuit in  United States District
Court against  Difco,  a  competitor, alleging  misappropriation  of  its  trade
secrets,  and is seeking  a constructive trust over  a patent covering important
aspects of  the Company's  technology issued  to Difco.  The patent,  which  was
issued  to Difco as a  result of its alleged  misappropriation, covers the basic
technology used in  the Company's  manual testing kits.  Difco has  agreed to  a
Stipulated Order that it will not market or sell products based on the patent in
controversy  unless it gives the Company 60 days advance notice. Upon receipt of
such notice, the  Company would  have an  opportunity to  renew its  Preliminary
Injunction Motion originally scheduled for February 1995, but suspended in light
of  the  Stipulated Order.  The  judge has  allowed  Difco to  file  a complaint
alleging infringement  of the  disputed  patent by  the  Company. A  hearing  on
Difco's  summary judgment against the Company was held on September 8, 1995. Due
to the discovery of the alleged misappropriation, the Company declined to accept
the proceeds of a $2,500,000 financing  scheduled to close on November 10,  1994
and  implemented significant cutbacks  in operations pending  the outcome of the
lawsuit, including the elimination of its domestic sales force and suspension of
 
                                      F-9
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
3.  BASIS OF PRESENTATION FOR THE FISCAL YEARS ENDED SEPTEMBER 30, 1994 AND
1995 (CONTINUED)
research and development efforts  and contract research. The  judge in the  case
has  set a trial date of January 28, 1996,  to hear the merits of the case. (The
above referenced litigation has been subsequently settled, see note 15).
 
    On  May  2,  1995,  the  Company  received  notice  that  MicroScan,   Inc.,
(MicroScan),  a wholly-owned  subsidiary of  Dade International,  Inc., filed an
intervention complaint with the court against both the Company and Difco,  which
alleges   that  one  of  the  Company's  founders  misappropriated  confidential
information of MicroScan while an employee of MicroScan prior to co-founding the
Company in 1988, and used such information to develop the Company's  technology.
The  Company filed a motion  for summary judgment and,  on October 17, 1995, the
Court  granted  the  Company's  summary   judgment  motion  and  dismissed   the
intervention complaint with prejudice.
 
    As  discussed in  note 7 and  note 16,  the Company merged  with AccuMed and
loaned AccuMed $700,000 to  support their operations.  In addition, the  Company
completed two financings in 1995 and received advances for a licensing agreement
which  substantially  improved  its  cash  position.  The  Company  closed  it's
Sacramento manufacturing facility in August  1995 and has significantly  reduced
overhead  costs. Manufacturing and distribution agreements have been established
with AccuMed.
 
    There can be no  assurance that combined operations  of the proposed  merger
will  produce the necessary cash flow  required. The financial statements do not
include any adjustments  that might  be necessary if  the Company  is unable  to
continue as a going concern.
 
4.  CHANGE IN FISCAL YEAR
    In  1995,  the Company  changed to  a  fiscal year  ending December  31. The
consolidated statement of  operations for  the three months  ended December  31,
1994 (unaudited) is presented for comparative purposes only.
 
<TABLE>
<CAPTION>
                                                                                               THREE MONTHS ENDED
CONSOLIDATED STATEMENT OF OPERATIONS (UNAUDITED)                                               DECEMBER 31, 1994
- --------------------------------------------------------------------------------------------  --------------------
<S>                                                                                           <C>
Sales.......................................................................................      $    100,614
Less cost of sales..........................................................................          (227,300)
                                                                                                    ----------
Gross profit (loss).........................................................................          (126,686)
                                                                                                    ----------
Operating expenses:
  General and administrative................................................................           384,181
  Research and development..................................................................           150,983
  Sales and marketing.......................................................................           171,420
                                                                                                    ----------
    Total operating expenses................................................................           706,584
                                                                                                    ----------
Operating loss..............................................................................          (833,270)
                                                                                                    ----------
Other income (expense):
  Interest income...........................................................................               664
  Interest expense..........................................................................           (13,267)
                                                                                                    ----------
    Total other income (expense)............................................................           (12,603)
                                                                                                    ----------
Loss before income taxes....................................................................          (845,873)
Income tax expense..........................................................................               200
                                                                                                    ----------
Net loss....................................................................................      $   (846,073)
                                                                                                    ----------
                                                                                                    ----------
Net loss per share..........................................................................      $      (0.17)
                                                                                                    ----------
                                                                                                    ----------
Weighted average common shares outstanding..................................................         4,894,294
                                                                                                    ----------
                                                                                                    ----------
</TABLE>
 
                                      F-10
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
5.  ACCOUNTS RECEIVABLE
    Accounts receivable includes the following at:
 
<TABLE>
<CAPTION>
                                                                                     SEPTEMBER 30,  DECEMBER 31,
                                                                                         1995           1995
                                                                                     -------------  -------------
<S>                                                                                  <C>            <C>
Trade receivables..................................................................   $   221,767    $   842,994
Contract refunds due...............................................................        43,050         43,050
Other receivables..................................................................            --          6,600
Allowance for doubtful accounts....................................................       (19,725)       (17,932)
                                                                                     -------------  -------------
  Total............................................................................   $   245,092    $   874,712
                                                                                     -------------  -------------
                                                                                     -------------  -------------
</TABLE>
 
    Accounts receivable are carried at their net realizable value.
 
6.  FIXED ASSETS
    Fixed assets includes the following at:
 
   
<TABLE>
<CAPTION>
                                                                       ESTIMATED    SEPTEMBER 30,  DECEMBER 31,
                                                                      USEFUL LIFE       1995           1995
                                                                     -------------  -------------  -------------
<S>                                                                  <C>            <C>            <C>
Equipment..........................................................    3 - 5 years   $   776,867    $   871,595
Leasehold improvements.............................................   5 - 13 years            --         60,947
Equipment under capital lease......................................        5 years       299,090        299,090
                                                                                    -------------  -------------
                                                                                       1,075,957      1,231,632
Less accumulated depreciation and amortization.....................                      664,831        703,230
                                                                                    -------------  -------------
                                                                                     $   411,126    $   528,402
                                                                                    -------------  -------------
                                                                                    -------------  -------------
</TABLE>
    
 
7.  NOTES RECEIVABLE
    Pursuant  to  the  merger  agreement (note  16),  the  Company  extended the
following loans,  which bear  interest at  10%  per annum,  to AccuMed  Inc.  to
provide working capital.
 
<TABLE>
<CAPTION>
DATE                                                                                  AMOUNT
- ----------------------------------------------------------------------------------  ----------
<S>                                                                                 <C>
May 9, 1995.......................................................................  $  150,000
May 31, 1995......................................................................     125,000
June 28, 1995.....................................................................     125,000
August 7, 1995....................................................................     125,000
August 29, 1995...................................................................     175,000
                                                                                    ----------
                                                                                    $  700,000
                                                                                    ----------
                                                                                    ----------
</TABLE>
 
    On November 20, 1995, the Company's Board of Directors agreed to consolidate
the  various notes above into  a single $700,000 note.  Upon consummation of the
merger on December 29, 1995, such amounts have been eliminated in consolidation.
 
                                      F-11
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
8.  OTHER CURRENT LIABILITIES
    Other current liabilities consist of the following at:
 
<TABLE>
<CAPTION>
                                                                           SEPTEMBER 30,  DECEMBER 31,
                                                                               1995           1995
                                                                           -------------  -------------
<S>                                                                        <C>            <C>
Deferred rent............................................................   $        --    $        --
Payroll and related costs................................................        84,970        286,998
Sales & use taxes........................................................           908             --
Customer deposits........................................................         2,169         47,169
Accrued rent.............................................................        89,750         64,255
Other accrued expenses...................................................        18,913        471,891
                                                                           -------------  -------------
    Total................................................................   $   203,497    $   870,313
                                                                           -------------  -------------
                                                                           -------------  -------------
</TABLE>
 
9.  DEFERRED REVENUE
    On May 3,  1995, the Company  entered into  a letter of  intent with  Becton
Dickinson, Inc., (Becton) pursuant to which the Company agreed to grant Becton a
semi-exclusive, worldwide license of the Company's alamarBlue-TM- technology for
a  specific field of use.  On October 10, 1995,  the license agreement (License)
between the Company and Becton was executed.
 
    On signing the letter of intent,  Becton paid the Company $100,000. On  June
28,  1995, Becton paid an  additional $400,000 to the  Company. In October 1995,
the Company received $250,000 for executing the license agreement, and  $750,000
upon  the initial  favorable resolution  of the  MicroScan lawsuit.  In February
1996, Becton paid an  additional $1,000,000 upon  final favorable resolution  of
the  MicroScan  lawsuit  and  $1,000,000  in  March  1996  upon  final favorable
resolution of the  Difco lawsuit. Of  this last amount,  $500,000 is  creditable
against future royalties.
 
    The  $1,500,000 received by  the Company through December  31, 1995 has been
deferred pending  resolution  of  the  above  mentioned  lawsuits.  Due  to  the
settlement  of the  lawsuits in  February and March  1996, all  of the remaining
deferred revenues will become income during the quarter ending March 31, 1996.
 
10. NOTES PAYABLE
    Notes payable consist of the following at:
 
<TABLE>
<CAPTION>
                                                                                 DECEMBER 31,
                                                                                     1995
                                                                                 -------------
<S>                                                                              <C>
Note payable to bank, guaranteed by stockholders, interest at 11.75% payable
 monthly with principal payment due on April 30, 1996..........................   $   100,000
Note payable to bank, guaranteed by stockholders, interest at 10.75% payable
 monthly with principal payment due on April 30, 1996..........................       455,000
Notes payable to stockholders, interest at 10%, due on demand..................        90,610
Bank line of credit, collateralized by substantially all assets of AccuMed
 International Limited, a wholly-owned subsidiary of the Company, due on
 demand........................................................................        80,904
                                                                                 -------------
                                                                                  $   726,514
                                                                                 -------------
                                                                                 -------------
</TABLE>
 
11. STOCKHOLDERS' EQUITY
    The Board of Directors is authorized to issue 5,000,000 shares of  preferred
stock,  the terms and rights  to be established upon  issuance. Of these shares,
382,500 have been designated as Series A 8% Cumulative Preferred Stock. None  of
these shares have been issued.
 
                                      F-12
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
11. STOCKHOLDERS' EQUITY (CONTINUED)
  WARRANTS
 
    In  February 1995, the Company granted warrants to a consulting firm for the
right to purchase 140,000  shares of the  Company's common stock  at a price  of
$.25  per share in lieu of the Company's liability of $105,000 to the consulting
firm. These warrants were exercised in  December 1995. In May 1995, the  Company
granted  warrants to a placement agent for  the right to purchase 100,000 shares
of the Company's common stock at a  price of $.25 per share as compensation  for
services  performed relating to the canceled  $2.5 million financing in November
1994. The warrants expire in August 2000. The difference between the fair market
value of the  stock and the  common stock  purchase price has  been recorded  as
issuance of common stock warrants.
 
    Additionally,  contingent upon consummation of the merger, a consulting firm
was granted a five year warrant to purchase up to 750,000 shares of common at  a
price  of $1.25  per share,  subject to certain  limitations. The  fair value of
these warrants has been recorded as issuance of common stock warrants.
 
    At December  31, 1995,  outstanding warrants  to purchase  shares of  common
stock at any time through the expiration date were as follows:
 
<TABLE>
<CAPTION>
  SHARES       PRICE      EXPIRATION DATE
- ----------  -----------  -----------------
<S>         <C>          <C>
 2,702,905        5.00           10/97
   104,000       2.125           10/97
   420,000        0.25           12/99
   175,000        5.00           12/99
    25,275        5.00            4/00
   264,840       0.625            5/00
   300,000       0.625            8/00
   100,000        0.25            8/00
    79,280        0.82            8/00
    79,280        1.64            8/00
    79,280        2.47            8/00
   750,000        1.25           12/00
    75,000       1.125           12/00
- ----------
 5,154,860
- ----------
- ----------
</TABLE>
 
  STOCK OPTION PLAN
 
    The Company has in effect three stock option plans for certain employees. On
October  15, 1990, the Company  adopted the 1990 Stock  Option Plan (1990 Plan).
The Company's employees, directors, and consultants are eligible to  participate
in  the Plan. The Company has reserved 177,324 shares of authorized but unissued
common stock for issuance under the 1990 Plan.
 
    On February 4, 1992,  the Company adopted the  1992 Stock Option Plan  (1992
Plan),  for  which the  Company  has reserved  an  additional 405,000  shares of
authorized but unissued  common stock. Options  issued under the  1992 Plan  are
issued,  exercisable, and  governed by substantially  the same  terms as options
issued under the 1990 Plan,  with the exception of  provisions in the 1990  Plan
accelerating  the vesting of options in instances of acquisition or liquidation,
which have been deleted from the 1992 Plan.
 
    On November 17,  1992, the  Board of  Directors also  approved an  increase,
approved by the stockholders on March 2, 1993, of the number of shares of common
stock reserved for issuance under the 1992 Plan from 405,000 to 505,000 shares.
 
                                      F-13
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
11. STOCKHOLDERS' EQUITY (CONTINUED)
    On  December 29, 1995, the Company adopted  the 1995 Stock Option Plan (1995
Plan), for which  the Company  has reserved  an additional  1,500,000 shares  of
authorized  but unissued  common stock. Options  issued under the  1995 Plan are
issued, exercisable, and  governed by  substantially the same  terms as  options
issued under the 1992 Plan.
 
Terms of the Plans include:
 
    EXERCISE  PRICE -- For  the 1990 Plan,  fair market value  determined by the
Board of Directors and not less than 110% of the determined fair market value in
certain instances. For  the 1992 Plan  and the  1995 Plan fair  market value  as
determined  by the closing price of the Common  Stock on the date of issuance as
reported by NASDAQ.
 
    VESTING PERIOD --  A portion of  the options granted  to participants  vests
immediately  with  the  remaining  options  vesting  on  varying  schedules  not
exceeding three years from date of grant.
 
    EXERCISE PERIOD -- The  options are exercisable as  to be determined by  the
Board  of  Directors  provided  that  not  less  than  20%  of  the  options are
exercisable per year and no option shall be exercisable after ten years from the
date the option is granted.
 
    SHARES AVAILABLE -- The  maximum number of shares  that may be issued  under
the 1995 Plan is 1,500,000 at December 31, 1995.
 
    In  the  year  ended  September  30, 1994,  options  for  4,741  shares were
exercised at a price of  $0.80 per share and  options to purchase 81,834  shares
were  canceled. In the year ended September  30, 1995, no options were exercised
and options to purchase 123,023 shares were canceled. In the three months  ended
December  31, 1995,  no options  were exercised  and options  to purchase 32,917
shares were canceled.
 
                                      F-14
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
11. STOCKHOLDERS' EQUITY (CONTINUED)
 
    At  December 31, 1995, there were 1,586,845 shares under options outstanding
of which 913,499 were exercisable as follows:
 
<TABLE>
<CAPTION>
  GRANT                                EXERCISE    EXPIRATION
  DATE       GRANTED     EXERCISABLE     PRICE        DATE
- ---------  ------------  -----------  -----------  -----------
<S>        <C>           <C>          <C>          <C>
    11/88           627         627    $     .80        12/96
     5/91         4,028       4,028         1.39         5/96
     6/91        85,000      85,000         1.39         6/96
     3/92         1,153       1,153         1.39         3/97
     5/92       303,890     303,890         1.39         5/97
     7/92         5,625       5,625         1.39         7/97
    11/92         7,455       7,455         1.39        11/97
     3/93         5,000       5,000         1.39         3/98
     6/93         1,500       1,500         1.39         6/98
     7/93         1,500       1,500         1.39         7/98
     8/93         4,457       4,457         1.39         8/98
    11/93         3,450       3,450         1.39        11/98
     5/94        42,000      42,000         1.39         5/99
    11/94        10,160      10,160         0.75        11/99
     3/95        50,000      50,000         0.63         3/00
     4/95        10,000      10,000         1.44         4/00
     8/95         5,000       5,000         1.00        11/98
    12/95        36,000      36,000         1.00        12/00
    12/95     1,010,000     336,654         1.13        12/05
           ------------  -----------
              1,586,845     913,499
           ------------  -----------
           ------------  -----------
</TABLE>
 
    COMMON STOCK
 
    In March 1994, the Company finalized an agreement with one of the  Company's
distributors,  to  purchase the  Company's  securities in  exchange  for certain
distribution, licensing and product development  rights. Under the terms of  the
agreement, the Company was obligated to issue 200,000 shares of common stock for
a  total consideration of  $500,000. At September 30,  1994, the distributor had
purchased $250,000 in common stock. In November 1994, the distributor  purchased
the  remaining  $250,000 in  common stock  and was  issued warrants  to purchase
166,667 additional shares  of stock  at an exercise  price of  $3.00 per  share,
which warrants expired in December 1995.
 
    In  March 1995,  the Company granted  80,645 shares of  the Company's common
stock at a price $0.62 per share for a total of $42,500 (net of financing  costs
of $7,500) to a private investor.
 
    During  May  and August  1995, the  Company  completed two  separate private
offerings for an  aggregate of 5,648,400  shares of the  Company's common  stock
providing  net proceeds of  $2,931,486 (net of  $598,764 of financing expenses).
Also, the Company's placement agent received warrants for the future purchase of
564,840 shares of  the Company's common  stock at an  exercise price of  $0.625.
Such warrants expire from May through August 2000.
 
    In  August 1995, the  Company granted 16,000 shares  of the Company's common
stock at  a price  of $1  per share  to a  vendor as  compensation for  services
performed in lieu of the Company's liability of $16,000 to the vendor.
 
                                      F-15
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
11. STOCKHOLDERS' EQUITY (CONTINUED)
    In  October 1995,  the Company granted  to each nonemployee  director of the
Company 10,000 shares  of the Company's  common stock  at a price  of $.625  per
share as compensation for services performed. Compensation expense in the amount
of $31,250 has been reflected in the Consolidated Statements of Operations.
 
    In  November 1995, the Company granted 20,000 shares of the Company's common
stock at  a price  of $.625  per share  to a  director for  consulting  services
performed related to the merger. Consulting expense in the amount of $12,500 has
been reflected in the Consolidated Statements of Operations.
 
12. INCOME TAXES
    Effective  October 1, 1993, the Company  adopted the provisions of Statement
of Financial Accounting Standards No. 109 (SFAS No. 109), ACCOUNTING FOR  INCOME
TAXES.  SFAS No.  109 requires the  recognition of deferred  tax liabilities and
assets  resulting  from  differences  between  the  tax  basis  of  assets   and
liabilities  and their  reported amounts in  the financial  statements that will
result in taxable  or deductible amounts  in future years.  Prior to October  1,
1993,  the  Company accounted  for income  taxes  in accordance  with Accounting
Principles Board Opinion No. 11. The effect of this change on operating  results
for  the year  ended September  30, 1994,  the year  of implementation,  was not
material.
 
    The net deferred tax assets and liabilities consist of the following at:
 
<TABLE>
<CAPTION>
                                                         SEPTEMBER 30,
                                                   --------------------------  DECEMBER 31,
                                                       1994          1995          1995
                                                   ------------  ------------  -------------
<S>                                                <C>           <C>           <C>
Deferred tax assets:
  Net operating loss carryforwards...............  $  4,400,000  $  5,460,000   $ 6,520,000
  Research and development credits...............       285,000       295,000       300,000
  Capitalized research and development costs.....       274,000       280,000            --
  Depreciation...................................       158,000       175,000       162,000
  Other..........................................        58,000        65,000       114,000
                                                   ------------  ------------  -------------
      Total......................................     5,175,000     6,275,000     7,096,000
Valuation allowance..............................    (5,175,000)   (6,275,000)   (7,096,000)
                                                   ------------  ------------  -------------
  Net deferred tax assets and liabilities........  $         --  $         --   $        --
                                                   ------------  ------------  -------------
                                                   ------------  ------------  -------------
</TABLE>
 
    At  December  31,  1995,  the  Company  had  approximately  $18,641,000  and
$3,101,000  in  net  operating  losses  for  federal  and  state  tax  purposes,
respectively,  available  to   be  carried  forward   to  future  periods.   The
carryforwards  expire from 2003  to 2011 for  federal purposes and  from 2010 to
2011 for  state  purposes.  The  Company  also  has  credits  for  research  and
development  of $300,000 available to offset  future federal income taxes, which
expire from 2003 to 2011.
 
    As a result  of providing a  valuation allowance equal  to the deferred  tax
assets,  there is no federal  tax provision. The provision  for tax is the state
minimum tax.
 
    During the last three years, the Company  has had more than a 50% change  in
ownership.  Section  382  of  the Internal  Revenue  Code  and  comparable state
statutes impose certain annual limitations  on the utilization of net  operating
loss  carryforwards and  research and  development credits  that can  be used to
offset income in future periods.
 
                                      F-16
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
13. LEASES
 
OPERATING LEASES
 
    The Company leased its facilities and one automobile under operating leases.
Rental expense  is recognized  on a  straight-line basis  over the  life of  the
lease.  Rental expense for the  years ended September 30,  1994 and 1995 and for
the three months  ended December 31,  1995 was $172,000,  $156,000 and  $71,000,
respectively.
 
    Minimum future annual rent payments are as follows for years ending December
31:
 
   
<TABLE>
<CAPTION>
    YEAR         AMOUNT
- ------------  ------------
<S>           <C>
    1996      $    380,205
    1997           315,950
    1998           315,950
    1999           309,642
    2000           197,876
 Thereafter      1,431,198
              ------------
    Total     $  2,950,821
              ------------
              ------------
</TABLE>
    
 
CAPITAL LEASES
 
    In  July and  September 1994,  the Company  entered into  capital leases for
production equipment  in  the  total  amount of  $231,693,  with  principal  and
interest  payable monthly, interest at approximately 21%, and total residuals of
$34,754 due in July and September 1997.
 
    In October  1994,  the Company  entered  into  a capital  lease  for  office
equipment  in the total  amount of $29,000, with  principle and interest payable
monthly, interest at 8.71%, and a residual of $4,350, due in October 1997.
 
    Future minimum lease payments under capital lease obligations for the  years
ending December 31 are as follows:
 
<TABLE>
<CAPTION>
YEAR                                                AMOUNT
- ------------------------------------------------  ----------
<S>                                               <C>
1996............................................  $  114,417
1997............................................      97,598
                                                  ----------
                                                     212,015
Less amount representing interest...............     (33,935)
                                                  ----------
                                                     178,080
Less current portion............................     (88,270)
                                                  ----------
Long-term portion...............................  $   89,810
                                                  ----------
                                                  ----------
</TABLE>
 
14. SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
    Noncash investing and financing activities:
 
    During  the years  ended September  30, 1994  and 1995  and the  three month
period ending  December 31,  1995,  the Company  acquired assets  under  capital
leases in the amounts of $231,693, $21,341 and $0, respectively.
 
    During the three months ended December 31, 1995, the Company acquired all of
the  outstanding shares  of AccuMed,  Inc. in exchange  for common  stock of the
Company. The fair value of net  liabilities assumed was $828,476. Cash  acquired
totaled $48,237.
 
                                      F-17
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
14. SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION (CONTINUED)
    Cash paid for interest and income taxes:
 
<TABLE>
<CAPTION>
                                                      YEARS ENDED
                                                     SEPTEMBER 30,
                                                  --------------------   THREE MONTHS ENDED
                                                    1994       1995      DECEMBER 31, 1995
                                                  ---------  ---------  --------------------
<S>                                               <C>        <C>        <C>
Cash paid during the period for:
  Interest......................................  $  12,836  $  46,657       $   19,122
  Income taxes..................................        800        800               --
</TABLE>
 
15. COMMITMENTS
 
  PFIZER AGREEMENT
 
    In October 1992, the Company entered into an agreement to conduct a research
project  for the purpose  of developing a testing  procedure for another entity.
The maximum payments the Company may receive for completion of the agreement are
$246,000. As of December 31, 1995, the Company had received payments of $184,500
based on procedures completed to date.
 
  LEGAL PROCEEDINGS
 
    In November 1994, the company initiated a civil action against a  competitor
for misappropriation of the Company's trade secrets covering a key technology in
the  Company's principle product line while  under a confidentiality and non-use
agreement. The  Company settled  this lawsuit  in February  1996 for  technology
rights and other consideration.
 
16. MERGER AND RELATED TRANSACTIONS
    On  December  29, 1995,  the Company  acquired  all of  the common  stock of
AccuMed, Inc. and its wholly owned subsidiary ("AccuMed"). AccuMed is  primarily
engaged in the research and development of diagnostic screening products for the
cytopathology   and   microbiology  clinical   laboratory,   pharmaceutical  and
veterinary segments  of the  health care  industry. Following  the  acquisition,
AccuMed  ceased to  exist as a  legal entity  and the merged  entity was renamed
AccuMed International, Inc. Pursuant  to the terms of  the merger agreement  the
Company  issued  3,931,401  unconditional  shares  of  common  stock  valued  at
$4,422,826 and  237,840 warrants  valued at  $68,252 on  December 29,  1995.  An
additional  1,881,910  shares  and  126,945  warrants  were  issued  to  AccuMed
stockholders on  December  29,  1995,  however, such  shares  and  warrants  are
contingent  and subject  to forfeiture  if specified  performance goals  are not
achieved by the merged  entity during the 24  months beginning January 1,  1996.
The  contingent consideration will  be recorded when the  goals are achieved and
will be computed based upon the stock price on such date.
 
    The acquisition  has  been  accounted  for  using  the  purchase  method  of
accounting,  and,  accordingly, the  purchase price  has  been allocated  to the
assets purchased and liabilities assumed based upon the fair values at the  date
of  acquisition. The  excess of the  purchase price  over the fair  value of the
tangible assets  has  been allocated  to  identifiable intangibles  of  acquired
proprietary  technology  ($2,644,556)  and in-process  research  and development
($3,965,000). The acquired  proprietary technology  will be  amortized over  the
expected  period to  be benefited, which  is estimated  to be 10  years with the
in-process research  and  development  charged  to operations  at  the  date  of
acquisition.
 
    The  contingency  associated with  940,955  shares and  63,472  warrants was
resolved (performance  goal  achieved) in  March  1996 resulting  in  contingent
consideration  of  approximately $5,273,000.  Such amount  will be  allocated to
acquired  proprietary  technology  ($1,775,000)  and  in-process  research   and
development ($3,498,000) and recorded in March 1996.
 
                                      F-18
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
16. MERGER AND RELATED TRANSACTIONS (CONTINUED)
    The  results  of  operations  of  AccuMed  have  not  been  included  in the
Consolidated Statements of  Operations because the  acquisition occurred at  the
end  of the three month period ended  December 31, 1995. The following pro forma
information has been prepared assuming that  the acquisition had taken place  at
the  beginning of  the respective  periods. The  pro forma  information includes
adjustments for  the amortization  of intangibles  and write-off  of  in-process
research  and development arising from the  transaction. The pro forma financial
information is not necessarily indicative of  the results of operations as  they
would have been had the transaction been effected on the assumed dates.
 
<TABLE>
<CAPTION>
                                                                      YEAR ENDED         THREE MONTHS
                                                                  SEPTEMBER 30, 1995  DECEMBER 31, 1995
                                                                  ------------------  ------------------
                                                                               (UNAUDITED)
<S>                                                               <C>                 <C>
Sales...........................................................    $    3,979,930      $    1,109,506
Net loss........................................................        (9,844,326)         (7,016,824)
Net loss per share..............................................    $        (1.00)     $         (.60)
</TABLE>
 
    The  Company,  AccuMed  and AccuMed  International  Limited,  a wholly-owned
subsidiary of  AccuMed,  entered  into  a  Manufacturing  and  Supply  Agreement
effective  as of July  1, 1995, (the Manufacturing  Agreement) pursuant to which
the Company purchased ID/MIC panels  from Sensititre Limited. The  Manufacturing
Agreement  was terminated on December 29, 1995.  Amounts paid to AccuMed for the
year ended September 30, 1995  under the Manufacturing Agreement were  $277,172.
Additionally,  the Company gave a deposit to AccuMed of $50,000 in October 1995,
for the purchase of supplies and raw materials in relation to this agreement.
 
    Pursuant to a  Distributor Agreement effective  as of July  1, 1995  between
AccuMed  and  the Company  (the  Distributor Agreement),  the  Company appointed
AccuMed as its distributor for microbiology products. AccuMed was the  exclusive
distributor  in the United  States, Canada, Mexico, Puerto  Rico, Japan, the Far
East, Australia and Europe (except  Italy, Portugal, Germany, Austria,  Belgium,
Cyprus,  Greece,  Luxembourg, The  Netherlands, Switzerland  and Turkey),  and a
non-exclusive distributor  in  Central  America, South  America,  Africa,  South
Africa,  Korea, East Europe, the Middle  East, China and Taiwan. The Distributor
Agreement was terminated on December 29,  1995. Amounts paid to AccuMed for  the
year ended September 30, 1995 under the Distributor Agreement were $35,677.
 
    Pursuant to an oral agreement (the Oral Agreement), the Company paid AccuMed
an  amount equal  to 30%  of AccuMed's  lease payment  (approximately $2,500 per
month) for its manufacturing  facility in Cleveland, Ohio  and 30% of  AccuMed's
general   overhead  expenses  in  consideration  for  AccuMed  providing  sales,
marketing and distribution services on  behalf of the Company. Such  arrangement
terminated  on December  29, 1995.  Amounts paid to  AccuMed for  the year ended
September 30, 1995, under this Oral Agreement were $67,508.
 
    Pursuant to a Research  and Development Agreement, effective  as of July  1,
1995, (the R&D Agreement) between the Company and AccuMed the Company granted to
Sensititre  Limited,  a  wholly-owned  subsidiary  of  AccuMed,  a non-exclusive
license to use  the Company's intellectual  property, including know-how,  trade
secrets  and  technology  relating to  alamarBlue-TM-  for the  sole  purpose of
conducting research and development activities using such intellectual property.
Under the R&D Agreement,  the Company paid the  actual hourly wage per  employee
hour  spent  on such  research and  development and  reimburses AccuMed  for its
expenses relating thereto. The  R&D Agreement terminated  on December 29,  1995.
Amounts  paid to AccuMed for  the year-ended September 30,  1995, under this R&D
Agreement were $20,000.
 
    At September 30, 1995,  the Company had recorded  an accounts receivable  of
$53,499  from  AccuMed which  resulted from  the sale  of inventory  to AccuMed.
Additionally, the Company had recorded
 
                                      F-19
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
16. MERGER AND RELATED TRANSACTIONS (CONTINUED)
approximately $123,000  of accounts  payable to  AccuMed for  services  received
pursuant   to  the   Manufacturing,  Distributor   and  Oral   Agreements.  Upon
consummation of the merger on December 29, 1995 such amounts were eliminated  in
consolidation.
 
    The  Company recorded  a deferred asset  at September 30,  1995, of $299,650
relating to  direct costs  paid  to unrelated  entities for  services  performed
related  to the merger.  These deferred costs have  been included in determining
the cost of AccuMed.
 
    In February 1995, the Company and  AccuMed entered into an agreement with  a
consulting  firm  (Consulting  Firm) to  pay  the Consulting  Firm  an aggregate
finders fee  for assistance  with the  merger, of  which $50,000  was paid  with
proceeds  from  the  Company's  private  offering in  August  1995  and  is non-
refundable. The  remaining  obligation was  satisfied  through the  issuance  of
444,444  shares  of common  stock on  December 29,  1995 and  the issuance  of a
five-year warrant to purchase 750,000 shares of common stock at $1.25 per share.
The total finders  fee of  $790,000 has  been included  as direct  costs of  the
acquisition.
 
    The  Company entered into an agreement with Bridgemere Capital (Bridgemere),
which has been acting as special advisor  to the Company, pursuant to which  the
Company  has  paid to  Bridgemere a  fee of  $50,000  and has  agreed to  pay an
additional $55,000 in cash and issued 56,000 shares of common stock on  December
29, 1995. The total finders fee of $168,000 has been included as direct costs of
the acquisition.
 
17. RELATED-PARTY TRANSACTIONS
    All  nonemployee directors  have received an  option to  purchase 750 common
shares and option to purchase 250 additional shares annually. In 1993 and  1994,
all  nonemployee directors received an option to purchase 1,000 shares and 5,000
shares of the  Company's common  stock, respectively. In  1995, all  nonemployee
directors  received options to  purchase 5,000 to 9,215  shares of the Company's
common stock,  contingent upon  their length  of service.  These directors  will
receive  options for 5,000 additional shares  annually. All such awards are made
pursuant to the 1992 Plan.
 
    On November 21, 1994, the Company  issued to certain officers and  employees
of  the  Company  options to  purchase  an  aggregate of  16,020  shares  of the
Company's common stock at an exercise price of $0.75 per share. Also, on  August
31,  1995, the  Company issued  to certain employees  of the  Company options to
purchase an  aggregate of  30,000 shares  of the  Company's common  stock at  an
exercise price of $1 per share.
 
    In  December 1994, the Company entered into a Consulting Services Agreement,
effective January 1,  1995, with a  Placement Agent, also  a stockholder of  the
Company,  pursuant  to  which  the Placement  Agent  agreed  to  provide certain
financial consulting services to the Company for  a period of 12 months with  an
option to renew the agreement for an additional 12 months at the consent of both
the  Placement Agent and  the Company. In exchange  for the consulting services,
the Company  will  pay the  Placement  Agent an  aggregate  sum of  $58,500.  At
September 30, 1995, the Company had paid the Placement Agent $42,500.
 
    In  September 1995,  the Company paid  $12,500 to a  director for consulting
services performed related to the private financings in May and August 1995  and
the  proposed merger between the Company  and AccuMed. Additionally, in November
1995, the Company issued 20,000 shares of the Company's common stock at a  price
of  $.625 per share to  the same director for  the consulting services described
above.
 
                                      F-20
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
17. RELATED-PARTY TRANSACTIONS (CONTINUED)
    During the  year ended  September  30, 1994,  the  Company entered  into  an
agreement with an Italian company, which is also a stockholder, for distribution
of  the Company's products in Europe.  Sales to this stockholder constituted 51%
and 18% of the Company's total sales for the years ended September 30, 1994  and
1995, respectively. At September 30, 1994 and 1995, accounts receivable from the
stockholder  amounted to  approximately $313,000 and  $65,000, respectively. The
distributor is no longer a stockholder of the Company.
 
18. SUBSEQUENT EVENTS (UNAUDITED)
    In January 1996, the Company received  $250,000 cash in exchange for a  note
payable  bearing interest  at 11%  due in April  1996, and  warrants to purchase
100,000 shares of common stock at  $1.25 per share. The total proceeds  received
of  $250,000 were allocated to the warrants  based on their estimated fair value
of $352,000. The difference of $102,000  has been reflected as other expense  in
the  Consolidated Statement of Operations for the three month period ended March
31, 1996. The original issue discount of $250,000 relating to the notes  payable
will  be amortized over the term of the note with $166,000 reflected as interest
expense in the Consolidated Statement of  Operations for the three month  period
ended March 31, 1996.
 
    At December 31, 1995, the Company had deferred revenue of $1,454,550 pending
resolution  of the Microscan  lawsuit and the Difco  lawsuit. Upon settlement of
these lawsuits in February 1996,  the Company received an additional  $2,000,000
from  Becton, $1,000,000 each in  February and March 1996,  per the terms of the
worldwide  license  agreement  executed  on  October  10,  1995.  Total   income
recognized for the three month period ended March 31, 1996 per the terms of this
agreement  was  $3,454,450  and  has  been  reflected  as  other  income  in the
Consolidated Statement of Operations.
 
    On December  29, 1995,  the Company  acquired  all of  the common  stock  of
AccuMed  and its  wholly-owned subsidiary. Pursuant  to the terms  of the merger
agreement, 1,881,910 shares of common stock and 126,945 warrants were issued  to
AccuMed  stockholders  which  were  contingent  and  subject  to  forfeiture  if
specified performance  goals  were  not  achieved  by  the  merged  entity.  The
contingency  associated with 940,955 shares of  common stock and 63,472 warrants
was resolved (performance goal achieved)  in March 1996 resulting in  contingent
consideration  of  $5,430,326. Such  amount has  been allocated  to identifiable
intangibles of  acquired  proprietary  technology  ($1,930,599)  and  in-process
research  and development ($3,499,727). The acquired proprietary technology will
be amortized over the expected period to be benefited, which is estimated to  be
ten  years, with the  in-process research and  development charged to operations
during the three months ended March 31, 1996.
 
    In March  1996,  the  Company  granted to  an  individual  in  exchange  for
consulting services rendered warrants to purchase 100,000 shares of common stock
at  a price of $2.125 per share. These warrants expire in January 2001. The fair
market value of  these warrants  of $230,000 has  been recorded  as issuance  of
common  stock  warrants with  an offsetting  charge reflected  as administration
expense in the Consolidated Statement of  Operations for the three month  period
ended March 31, 1996.
 
    In  March 1996, the Company granted to  certain investors in a related party
warrants to purchase 675,000 shares of common stock at a price of $3.42 to $3.87
per share. These warrants expire in March  1999. The fair market value of  these
warrants of $852,390 has been recorded as issuance of common stock warrants with
an offsetting charge reflected as other expense in the Consolidated Statement of
Operations for the three month period ended March 31, 1996.
 
                                      F-21
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
         NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
18. SUBSEQUENT EVENTS (UNAUDITED) (CONTINUED)
   
    In  April  1996,  the  Company  agreed  to  acquire  the  assets  of Accuron
Corporation, an Ohio corporation ("Accuron"), in consideration for the  issuance
of 100,000 shares of Common Stock, a value of approximately $600,000. The assets
to be acquired consist largely of U.S. and foreign patents in the areas of image
analysis  and automated cytology. The Company will not assume any liabilities of
Accuron.
    
 
    In June 1996, 166,586 shares of common stock were issued to a related  party
pursuant  to an agreement requiring conversion  of the outstanding principal and
the accrued and unpaid interest totalling  $75,000 into 68,500 shares of  common
stock of AccuMed prior to the merger with the Company.
 
   
    For the six month period ended June 30, 1996, the Company granted options to
purchase  631,500 shares  at prices  of $1.75  to $8.38  per share,  options for
374,273 shares were exercised at prices of $0.63 to $1.39 per share and  options
to purchase 52,101 shares were canceled.
    
 
   
    In  July 1996, the Company  signed a letter of  intent with a distributor to
outsource the manufacturing of one of the Company's microbiology product lines.
    
 
   
    In August 1996, the Company entered into definitive agreements to acquire  a
two-thirds  interest in  Oncometrics Imaging  Corp. ("Oncometrics")  for a total
purchase price of approximately $4.0  million which includes approximately  $2.0
million to be used solely as working capital for Oncometrics.
    
 
   
    In  August 1996, the Company entered  into a definitive agreement to acquire
the remaining 90% interest in Radco Ventures, Inc. ("Radco"), for  approximately
$1.4 million in cash.
    
 
                                      F-22
<PAGE>
                                AUDITORS' REPORT
 
To the Board of Directors
Oncometrics Imaging Corp.
 
    We   have  audited  the  balance  sheets  of  the  AIC  division  of  Xillix
Technologies Corp. as at August 31,  1995 and December 31, 1995 and  Oncometrics
Imaging  Corp. at May 31, 1996 and  the statements of operations and deficit and
changes in  financial  position for  the  periods then  ended.  These  financial
statements   are   the   responsibility  of   the   Company's   management.  Our
responsibility is to express an opinion  on these financial statements based  on
our audit.
 
    We  conducted our audit in accordance generally accepted auditing standards.
Those standards require that we plan  and perform an audit to obtain  reasonable
assurance whether the financial statements are free of material misstatement. An
audit  includes examining, on a test  basis, evidence supporting the amounts and
disclosures in the financial  statements. An audit  also includes assessing  the
accounting principles used and significant estimates made by management, as well
as evaluating the overall financial statement presentation.
 
    In  our opinion, these financial statements  present fairly, in all material
respects, the financial position  of the Division and  the Company as at  August
31,  1995, December 31, 1995, and May 31, 1996 and the results of its operations
and the  changes  in  its financial  position  for  the periods  then  ended  in
accordance  with generally  accepted accounting  principles. As  required by the
Company Act (British Columbia), we report that, in our opinion, these principles
have been applied on a basis consistent with that of the preceding year.
 
    Generally  accepted  accounting  principles   in  Canada  vary  in   certain
significant respects from generally accepted accounting principles in the United
States.  As indicated in note 12 there  are no material differences which affect
the results of operations in each of the periods and shareholders' deficiency as
of August 31, 1995, December 31, 1995 and May 31, 1996.
 
/s/ KPMG
Chartered Accountants
Vancouver, Canada
July 18, 1996
 
                                      F-23
<PAGE>
                           ONCOMETRICS IMAGING CORP.
                                 BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                            AUGUST 31,   DECEMBER 31,    MAY 31,
                                                                               1995          1995          1996
                                                                            -----------  -------------  ----------
<S>                                                                         <C>          <C>            <C>
ASSETS
 
Current assets:
  Cash....................................................................   $      --    $        --   $   18,006
  Accounts receivable.....................................................      37,818        222,576       35,960
  Inventories (note 3)                                                         147,592         80,249      138,050
  Other...................................................................          --             --        5,438
                                                                            -----------  -------------  ----------
                                                                               185,410        302,825      197,454
                                                                            -----------  -------------  ----------
Capital assets, net (note 4)..............................................     244,916        238,197      236,847
                                                                            -----------  -------------  ----------
                                                                             $ 430,326    $   541,022   $  434,301
                                                                            -----------  -------------  ----------
                                                                            -----------  -------------  ----------
LIABILITIES AND EQUITY (DEFICIENCY)
 
Current liabilities:
  Accounts payable and accrued liabilities (note 5).......................   $  45,600    $    22,700   $  105,962
  Current portion of long-term debt (note 6)..............................                     10,000       10,000
                                                                            -----------  -------------  ----------
                                                                                45,600         32,700      115,962
                                                                            -----------  -------------  ----------
Long-term debt (note 6)...................................................     318,338        308,338      308,338
                                                                            -----------  -------------  ----------
Equity (deficiency):
  Share capital (note 7)..................................................          --             --      199,984
  Xillix divisional equity, net of operating loss (note 8)................      66,388        199,984           --
  Xillix capital contributions (note 9)...................................          --             --      302,374
                                                                            -----------  -------------  ----------
                                                                                66,388        199,984      502,358
  Deficit.................................................................          --             --     (492,357)
                                                                            -----------  -------------  ----------
                                                                                66,388        199,984       10,001
                                                                            -----------  -------------  ----------
                                                                             $ 430,326    $   541,022   $  434,301
                                                                            -----------  -------------  ----------
                                                                            -----------  -------------  ----------
</TABLE>
 
                See accompanying notes to financial statements.
 
                                      F-24
<PAGE>
                           ONCOMETRICS IMAGING CORP.
                      STATEMENTS OF OPERATIONS AND DEFICIT
 
<TABLE>
<CAPTION>
                                                                 TWELVE MONTHS                       FIVE MONTHS
                                                                     ENDED       FOUR MONTHS ENDED      ENDED
                                                                AUGUST 31, 1995  DECEMBER 31, 1995   MAY 31, 1996
                                                                ---------------  ------------------  ------------
<S>                                                             <C>              <C>                 <C>
Revenues
  Product sales...............................................   $     220,862      $    198,845      $    7,012
  Interest income.............................................              --                --           1,554
                                                                ---------------         --------     ------------
                                                                       220,862           198,845           8,566
                                                                ---------------         --------     ------------
Cost and expenses:
  Cost of sales...............................................         183,927           119,325           4,297
  Marketing, sales and support................................              --                --          82,062
  Research and development....................................       1,290,188           300,853         283,522
  General and administrative..................................              --                --         100,435
  General and administrative allocation from parent company...         235,826            60,320              --
  Depreciation and amortization...............................          71,840            23,680          30,607
                                                                ---------------         --------     ------------
                                                                     1,781,781           504,178         500,923
                                                                ---------------         --------     ------------
Loss for the period...........................................   $   1,560,919      $    305,333         492,357
                                                                ---------------         --------
                                                                ---------------         --------
Deficit, beginning of period..................................                                                --
                                                                                                     ------------
Deficit, end of period........................................                                        $  492,357
                                                                                                     ------------
                                                                                                     ------------
</TABLE>
 
                See accompanying notes to financial statements.
 
                                      F-25
<PAGE>
                           ONCOMETRICS IMAGING CORP.
                  STATEMENTS OF CHANGES IN FINANCIAL POSITION
 
<TABLE>
<CAPTION>
                                                                 TWELVE MONTHS                       FIVE MONTHS
                                                                     ENDED       FOUR MONTHS ENDED      ENDED
                                                                AUGUST 31, 1995  DECEMBER 31, 1995   MAY 31, 1996
                                                                ---------------  ------------------  ------------
<S>                                                             <C>              <C>                 <C>
Cash provided by (used in):
Operations:
  Loss for the period.........................................   $  (1,560,919)     $   (305,333)    $   (492,357)
  Depreciation and amortization an item not involving cash....          71,840            23,680           30,607
                                                                ---------------       ----------     ------------
                                                                    (1,489,079)         (281,653)        (461,750)
                                                                ---------------       ----------     ------------
  Changes in non-cash operating working capital:
    Accounts receivable.......................................         (37,818)         (184,758)         186,616
    Inventories...............................................        (147,592)           67,343          (57,801)
    Other current assets......................................              --                --           (5,438)
    Accounts payable and accrued liabilities..................          45,600           (22,900)          83,262
                                                                ---------------       ----------     ------------
                                                                    (1,628,889)         (421,968)        (255,111)
                                                                ---------------       ----------     ------------
Financing:
  Increase in equity..........................................       1,627,307           438,929          302,374
  Increase in long-term debt..................................         318,338                --               --
                                                                ---------------       ----------     ------------
                                                                     1,945,645           438,929          302,374
                                                                ---------------       ----------     ------------
Investments:
  Purchase of capital assets, net.............................        (316,756)          (16,961)         (29,257)
                                                                ---------------       ----------     ------------
Increase in cash..............................................              --                --           18,006
Cash, beginning of period.....................................              --                --               --
                                                                ---------------       ----------     ------------
Cash, end of period...........................................   $          --      $         --     $     18,006
                                                                ---------------       ----------     ------------
                                                                ---------------       ----------     ------------
</TABLE>
 
                See accompanying notes to financial statements.
 
                                      F-26
<PAGE>
                           ONCOMETRICS IMAGING CORP.
                         NOTES TO FINANCIAL STATEMENTS
 
1.  FORMATION AND OPERATIONS:
    A Division of  Xillix Technologies  Inc. ("Xillix") has  specialized in  the
research   and  development   of  Automated  Image   Cytometry  equipment  ("AIC
Division").
 
    In contemplation  of  raising  additional  capital  for  the  AIC  Division,
Oncometrics   Imaging  Corp.  (the  "Company")  was  formed  as  a  wholly-owned
subsidiary of Xillix in October 1995.  Effective January 1, 1996 the  operations
of  the AIC Division were transferred to the  Company. The net assets of the AIC
Division were transferred on January 20, 1996 in consideration of shares of  the
Company.  The value assigned to the shares  was equal to the historical value of
net assets transferred.
 
    The accompanying financial  statements include the  accounts of the  Company
for  the period  January 1, 1996  to May  31, 1996 and  the accounts  of the AIC
Division for the year ended August 31,  1995 and the four months ended  December
31, 1995.
 
    The  financial statements for the year ended August 31, 1995 and four months
ended December  31,  1995  include  an allocation  of  the  overhead  of  Xillix
applicable to the AIC Division, based on proportionate wages.
 
2.  SIGNIFICANT ACCOUNTING POLICIES:
    These  financial statements have  been prepared by  management in accordance
with generally  accepted accounting  principles in  Canada (Canadian  GAAP)  and
presented  in Canadian dollars. These financial  statements also conform, in all
material respects, with those accounting principles that are generally  accepted
in the United States (US GAAP), except for these matters referred to in note 12.
 
    (a) Basis of presentation:
 
    These  financial  statements  are prepared  for  inclusion in  a  SEC filing
statement for purposes of funding the  acquisition of a 66 2/3% equity  interest
of Oncometrics Imaging Corp. pursuant to a letter of intent dated July 3, 1996.
 
    The  financial statements have been prepared  on the basis which assumes the
realization of assets  and settlement  of liabilities  in the  normal course  of
business. The ability of the Company to continue its planned course of action is
dependent  upon continued  financial support  from its  parent company  and upon
additional financing and obtaining future profitable operations.
 
    (b) Inventories:
 
    Inventories are included  at the lower  of average cost  and net  realizable
value.
 
    (c) Capital assets:
 
    Capital  assets  are  stated at  cost.  Depreciation is  provided  using the
following methods and annual rates:
 
<TABLE>
<CAPTION>
                        ASSET                                       BASIC                 RATE
- -----------------------------------------------------  -------------------------------  ---------
<S>                                                    <C>                              <C>
Computer and laboratory equipment                      declining-balance                      30%
Furniture and office equipment                         declining-balance                      20%
Demonstration equipment                                straight-line over 3 years
Leasehold improvements                                 straight-line over 5 years
Intellectual property and patents                      straight-line over 17 years
</TABLE>
 
    (d) Research and development costs:
 
    Research and development (R&D) costs are expensed as incurred. Research  and
related  government assistance is accounted for  using the cost reduction method
and is credited against R&D expenditures.
 
                                      F-27
<PAGE>
                           ONCOMETRICS IMAGING CORP.
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
2.  SIGNIFICANT ACCOUNTING POLICIES: (CONTINUED)
    (e) Estimates:
 
    Preparation  of  financial  statements  in  conformity  with  GAAP  requires
management to make estimates and assumptions that effect the reported amounts of
assets  and liabilities and  disclosure of contingent  assets and liabilities at
the date of  the financial statements  and the reported  amounts of revenue  and
expenses during the period. Actual results could differ from these estimates.
 
3.  INVENTORIES:
    Inventories  comprises finished goods of $  nil (August 31, 1995 -- $70,000;
December 31,  1995 --  $ nil)  and materials  of $138,050  (August 31,  1995  --
$77,592; December 31, 1995 -- $80,249).
 
4.  CAPITAL ASSETS:
 
<TABLE>
<CAPTION>
                                                                            AUGUST 31,   DECEMBER 31,    MAY 31,
                                                                               1995          1995          1996
                                                                            -----------  -------------  ----------
<S>                                                                         <C>          <C>            <C>
Computer and laboratory equipment.........................................   $ 194,130    $   207,891   $  221,811
Furniture and office equipment............................................       7,923          7,923       11,339
Demonstration equipment...................................................     107,562        108,623      108,623
Leasehold improvements....................................................          --             --        3,883
Intellectual property and patents.........................................     121,901        124,040      132,078
                                                                            -----------  -------------  ----------
                                                                               431,516        448,477      477,734
Less accumulated depreciation and amortization............................     186,600        210,280      240,887
                                                                            -----------  -------------  ----------
                                                                             $ 244,916    $   238,197   $  236,847
                                                                            -----------  -------------  ----------
                                                                            -----------  -------------  ----------
</TABLE>
 
5.  ACCOUNTS PAYABLE AND ACCRUED LIABILITIES:
    Accrued liabilities include a warranty reserve of $9,120 (August 31, 1995 --
$20,000;  December 31, 1995 -- $10,000) and accrued salary and vacation pay of $
nil (August 31, 1995 -- $25,600; -- December 31, 1995 -- $ nil).
 
6.  LONG-TERM DEBT:
    Long-term debt consists of repayable contribution from the Western  Economic
Diversification  Program  which  was  assumed  from  Xillix  Technologies  Corp.
("Xillix") and is still in the name of Xillix as follows:
 
<TABLE>
<CAPTION>
                                                                            AUGUST 31,   DECEMBER 31,    MAY 31,
                                                                               1995          1995          1996
                                                                            -----------  -------------  ----------
<S>                                                                         <C>          <C>            <C>
Balance assumed...........................................................   $ 318,338    $   318,338   $  318,338
Less current portion......................................................          --         10,000       10,000
                                                                            -----------  -------------  ----------
                                                                             $ 318,338    $   308,338   $  308,338
                                                                            -----------  -------------  ----------
                                                                            -----------  -------------  ----------
</TABLE>
 
    The Western Diversification  construction does  not bear  interest. This  is
repayable  in semi-annual contributions commencing  January 31, 1994. Repayments
are based on future sales of the ACCESS device.
 
    The estimated  aggregate  maximum repayments  for  each of  the  five  years
subsequent to December 31, 1995 are as follows:
 
<TABLE>
<S>                                                                         <C>
1996......................................................................  $  10,000
1997......................................................................    100,000
1998......................................................................    100,000
1999......................................................................    100,000
2000......................................................................      8,338
</TABLE>
 
                                      F-28
<PAGE>
                           ONCOMETRICS IMAGING CORP.
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
7.  SHARE CAPITAL:
 
    (a) Authorized:
 
    The  authorized share capital  of the Company  consists of 50,000,000 common
shares without par value.
 
    (b) Issued:
 
<TABLE>
<CAPTION>
                                                                            AUGUST 31,    DECEMBER 31,     MAY 31,
                                                                               1995           1995           1996
                                                                            -----------  ---------------  ----------
<S>                                                                         <C>          <C>              <C>
1,775,000 (1 -- December 31, 1995) common shares..........................   $     N/A      $      --     $  199,984
                                                                            -----------           ---     ----------
                                                                            -----------           ---     ----------
</TABLE>
 
8.  DIVISIONAL EQUITY:
    The divisional equity at  December 31, 1995 and  August 31, 1995  represents
the  sum of  cash contributions, plus  the net  assets of the  division less the
divisional loss.
 
9.  XILLIX CAPITAL CONTRIBUTION:
    This represents loans by  Xillix to the Company  which will be converted  to
shares.
 
10. INCOME TAXES:
    As  at  May 31,  1996  the Company  has  non-capital losses  for  income tax
purposes of approximately $256,000  available to reduce  taxes of future  years,
which  expire in  2000. The  Company also  has Scientific  Research Experimental
Development Expenditures of approximately $214,000 at May 31, 1996.
 
    No recognition has been given in these financial statements to the potential
future tax benefits which  may arise from claiming  these losses and  Scientific
Research and Experimental Development Expenditures.
 
11. EXPORT SALES:
    The Company's division had export sales in the following geographic regions:
 
<TABLE>
<CAPTION>
                                                                   FOUR MONTHS
                                                  TWELVE MONTHS       ENDED       FIVE MONTHS
                                                   ENDED AUGUST   DECEMBER 31,   ENDED MAY 31,
                                                     31, 1995         1995           1996
                                                  --------------  -------------  -------------
<S>                                               <C>             <C>            <C>
United States...................................    $  148,453     $     8,190     $   4,326
Europe..........................................         2,428         129,675         2,186
                                                  --------------  -------------       ------
                                                    $  150,881     $   137,865     $   6,512
                                                  --------------  -------------       ------
                                                  --------------  -------------       ------
</TABLE>
 
12. DIFFERENCES BETWEEN CANADIAN AND UNITED STATES GENERALLY ACCEPTED ACCOUNTING
PRINCIPLES:
    In  February 1992, the Financial Accounting Standards Board issued Statement
No. 109,  "ACCOUNTING  FOR  INCOME  TAXES". Statement  109  changed  the  method
companies used to account for income taxes from the deferral method to the asset
and  liability method.  This statement is  effective for  fiscal years beginning
after December  15,  1992. The  Company  has  determined that  the  adoption  of
Statement  109 does not result  in a material effect  on the net deferred income
tax position of the Company as any deferred tax assets initially recognized  are
fully offset by a valuation allowance as at December 31, 1995.
 
                                      F-29
<PAGE>
               PRO FORMA CONDENSED COMBINING FINANCIAL STATEMENTS
 
   
    The accompanying pro forma condensed combining financial statements reflects
the  proposed  acquisition  of  a  66%  interest  in  Oncometrics  Imaging Corp.
(Oncometrics) by AccuMed International,  Inc. (AccuMed International)  (formerly
Alamar Biosciences, Inc), the proposed acquisition of the remaining 90% interest
in Radco Ventures, Inc. (Radco), the merger of AccuMed International and AccuMed
Inc. (AccuMed), and the purchase of certain assets and the assumption of certain
liabilities from Sensititre US and Sensititre Ltd. by AccuMed.
    
 
   
    The  pro forma condensed combining balance sheet as of June 30, 1996 assumes
that the  proposed  acquisition of  the  66%  interest in  Oncometrics  and  the
proposed acquisition of the remaining 90% interest in Radco occurred on June 30,
1996.  The pro  forma condensed combining  statements of operations  for the six
months ended June 30, 1996, for the  six months ended December 31, 1995 and  for
the  year ended September 30,  1995 assume that the  proposed acquisition of the
66% interest in Oncometrics  occurred on October 1,  1994. In addition, the  pro
forma  condensed combining statements  of operations for  the three months ended
December 31, 1995  and for the  year ended  September 30, 1995  assume that  the
merger  of AccuMed International with Accumed  and the purchase of Sensititre US
and Sensititre  Ltd.  occurred  on  October 1,  1994.  The  condensed  combining
statements  of operations do  not reflect results of  operations for Radco since
its' incorporation on March 6, 1996. Such results are not deemed significant.
    
 
    The transactions have been accounted for using purchase accounting. The  pro
forma  adjustments are based on preliminary assumptions of the allocation of the
purchase price and are subject to  substantial revision once evaluations of  the
fair  value  of  the  assets  and  liabilities  are  completed.  Actual purchase
accounting adjustments  may  differ from  the  pro forma  adjustments  presented
herein.
 
   
    The  respective  Oncometrics  financial results  have  been  translated from
Canadian dollars to U.S. dollars  using an exchange rate  of .7451 for the  year
ended  September 30, 1995, .7391  for the three months  ended December 31, 1995,
 .7331 for the six months ended June 30, 1996, and .7333 as of June 30, 1996.
    
 
    The pro forma condensed combining  financial information is not  necessarily
indicative  of the results that actually would have occurred if the acquisitions
had been completed  on the assumed  dates nor are  the statements indicative  of
future combined financial position or earnings.
 
                                      F-30
<PAGE>
   
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
                  PRO FORMA CONDENSED COMBINING BALANCE SHEET
                                 JUNE 30, 1996
                                  (UNAUDITED)
    
 
   
<TABLE>
<CAPTION>
                                         ACCUMED      ONCOMETRICS      RADCO
                                      INTERNATIONAL,    IMAGING      VENTURES,
                                           INC.        CORP. (A)      INC. (B)      ADJUSTMENTS       PRO FORMA
                                      --------------  ------------  ------------  ----------------  --------------
<S>                                   <C>             <C>           <C>           <C>               <C>
ASSETS:
Cash and cash equivalents...........  $      595,265   $   13,246   $    800,000  $  2,000,000(1)   $    3,408,511
Accounts receivable.................       1,405,486       26,455             --            --           1,431,941
Prepaid expenses and deposits.......         231,194           --             --            --             231,194
Production inventory................       1,513,760      101,559             --            --           1,615,319
                                      --------------  ------------  ------------  ----------------  --------------
  Total current assets..............       3,745,705      141,260        800,000     2,000,000           6,686,965
                                      --------------  ------------  ------------  ----------------  --------------
Fixed assets, net...................         401,970      174,241             --                           576,211
Intangible assets...................       4,403,677           --             --     2,670,000(1)        7,703,677
                                                                                       630,000(2)
Other assets........................         168,402        4,001             --                           172,403
                                      --------------  ------------  ------------  ----------------  --------------
                                      $    8,719,754   $  319,502   $    800,000  $  5,300,000      $   15,139,256
                                      --------------  ------------  ------------  ----------------  --------------
                                      --------------  ------------  ------------  ----------------  --------------
LIABILITIES AND STOCKHOLDERS' EQUITY
Current portion of long-term debt...  $           --   $    7,357   $         --  $         --      $        7,357
Capital lease obligations due within
 one year...........................          86,067           --             --            --              86,067
Accounts payable....................       2,242,433       77,952         50,000                         2,370,385
Due to Xillix Technologies Corp.....              --           --             --     4,000,000(1)        4,000,000
Due to Radco Ventures...............              --           --             --     1,380,000(2)        1,380,000
Other current liabilities...........         807,823           --             --            --             807,823
Notes payable.......................          37,497           --             --            --              37,497
                                      --------------  ------------  ------------  ----------------  --------------
  Total current liabilities.........       3,173,820       85,309         50,000     5,380,000           8,689,129
                                      --------------  ------------  ------------  ----------------  --------------
Long-term portion of capital lease
 obligations........................          45,243           --             --            --              45,243
Long-term debt......................              --      226,835             --            --             226,835
Deferred rent.......................          13,393           --             --            --              13,393
Minority interest...................              --           --             --       677,358             677,358
Stockholders' equity:
  Common stock......................         175,257           --             --            --             175,257
  Additional paid-in capital........      32,694,471           --        750,000      (750,000)(2)      32,694,471
  Cumulative translation
   adjustment.......................          (2,236)          --             --            --              (2,236)
  Accumulated deficit...............     (27,380,194)       7,358             --        (7,358)(1)     (27,380,194)
                                      --------------  ------------  ------------  ----------------  --------------
    Total stockholders' equity......       5,487,298        7,358        750,000      (757,358)          5,487,298
                                      --------------  ------------  ------------  ----------------  --------------
                                      $    8,719,754   $  319,502   $    800,000  $  5,300,000      $   15,139,256
                                      --------------  ------------  ------------  ----------------  --------------
                                      --------------  ------------  ------------  ----------------  --------------
</TABLE>
    
 
- ------------------------
(A) Represents net assets of Oncometrics as of May 31, 1996.
 
(B) Represents net assets of Radco as of June 30, 1996.
 
               See accompanying notes to the pro forma condensed
                        combining financial statements.
 
                                      F-31
<PAGE>
   
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
             PRO FORMA CONDENSED COMBINING STATEMENT OF OPERATIONS
                     FOR THE SIX MONTHS ENDED JUNE 30, 1996
                                  (UNAUDITED)
    
 
   
<TABLE>
<CAPTION>
                                                           ACCUMED     ONCOMETRICS
                                                        INTERNATIONAL,   IMAGING
                                                            INC.        CORP. (A)     ADJUSTMENTS     PRO FORMA
                                                        -------------  ------------  -------------  -------------
<S>                                                     <C>            <C>           <C>            <C>
Sales.................................................   $ 2,312,094    $    6,044   $        --    $   2,318,138
Cost of sales.........................................    (1,465,457)       (3,402)           --       (1,468,859)
                                                        -------------  ------------  -------------  -------------
Gross profit..........................................       846,637         2,642            --          849,279
                                                        -------------  ------------  -------------  -------------
Operating expenses:
  General and administrative..........................     1,951,491       113,465        54,000(4)     2,118,956
  Research and development............................     4,789,412       335,869            --        5,125,281
  Sales and marketing.................................       841,565        70,931            --          912,496
                                                        -------------  ------------  -------------  -------------
    Total operating expenses..........................     7,582,468       520,265        54,000        8,156,733
                                                        -------------  ------------  -------------  -------------
Operating loss........................................    (6,735,831)     (517,623)      (54,000)      (7,307,454)
Other income (expense):
  Interest income.....................................        11,460                          --           11,460
  Interest expense....................................      (437,986)           --            --         (437,986)
  Other income........................................     2,544,513        (2,738)           --        2,541,775
                                                        -------------  ------------  -------------  -------------
Loss before income taxes and minority interest........    (4,617,844)     (520,361)      (54,000)      (5,192,205)
Income tax expense....................................           850            --                            850
                                                        -------------  ------------  -------------  -------------
Net loss before minority interest.....................    (4,618,694)     (520,361)      (54,000)      (5,193,055)
Minority interest.....................................            --            --       175,000(5)       175,000
                                                        -------------  ------------  -------------  -------------
    Net earnings (loss)...............................   $(4,618,694)   $ (520,361)  $   121,000    $  (5,018,055)
                                                        -------------  ------------  -------------  -------------
                                                        -------------  ------------  -------------  -------------
Net loss per share....................................                                              $       (0.31)
                                                                                                    -------------
                                                                                                    -------------
Weighted average common shares outstanding............                                                 16,319,105
                                                                                                    -------------
                                                                                                    -------------
</TABLE>
    
 
- ------------------------
   
(A) Includes the six months ended June 30, 1996 for Oncometrics.
    
 
               See accompanying notes to the pro forma condensed
                        combining financial statements.
 
                                      F-32
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
             PRO FORMA CONDENSED COMBINING STATEMENT OF OPERATIONS
                  FOR THE THREE MONTHS ENDED DECEMBER 31, 1995
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                              ACCUMED                    ONCOMETRICS
                                           INTERNATIONAL,                  IMAGING
                                               INC.       ACCUMED INC.    CORP. (A)     ADJUSTMENTS    PRO FORMA
                                           -------------  -------------  ------------  -------------  ------------
<S>                                        <C>            <C>            <C>           <C>            <C>
Sales....................................   $   100,130    $ 1,009,376    $  146,959   $  (73,005)(6) $  1,183,460
Cost of sales............................      (338,730 )     (830,497 )     (88,189 )      71,892(7)   (1,185,524)
                                           -------------  -------------  ------------  -------------  ------------
Gross profit (loss)......................      (238,600 )      178,879        58,770        (1,113  )       (2,064)
                                           -------------  -------------  ------------  -------------  ------------
Operating expenses:
  General and administration.............     1,418,797        758,066        49,759        27,000(4)    2,253,622
  Research and development...............     3,997,600        338,178       172,259            --       4,508,037
  Sales and marketing....................         7,197        289,360            --            --         296,557
                                           -------------  -------------  ------------  -------------  ------------
Total operating expenses.................     5,423,594      1,385,604       222,018        27,000       7,058,216
                                           -------------  -------------  ------------  -------------  ------------
Operating loss...........................    (5,662,194 )   (1,206,725 )    (163,248 )     (28,113  )   (7,060,280)
Other income (expense):
  Interest income........................         4,748             --            --            --           4,748
  Interest (expense).....................       (10,862 )       (1,948 )          --            --         (12,810)
  Other..................................       (72,929 )           --            --            --         (72,929)
                                           -------------  -------------  ------------  -------------  ------------
Loss before income taxes and minority
 interest................................    (5,741,237 )   (1,208,673 )    (163,248 )     (28,113  )   (7,141,271)
Provision for income taxes...............           800             --            --            --             800
                                           -------------  -------------  ------------  -------------  ------------
Net loss before minority interest........    (5,742,037 )   (1,208,673 )    (163,248 )     (28,113  )   (7,142,071)
Minority interest........................            --             --            --        65,000(5)       65,000
                                           -------------  -------------  ------------  -------------  ------------
Net earnings (loss)......................  $ (5,742,037 ) $ (1,208,673 ) $  (163,248 ) $    36,887    $ (7,077,071)
                                           -------------  -------------  ------------  -------------  ------------
                                           -------------  -------------  ------------  -------------  ------------
Net loss per share.......................                                                             $      (0.60)
                                                                                                      ------------
                                                                                                      ------------
Weighted average common shares
 outstanding.............................                                                               11,742,980
                                                                                                      ------------
                                                                                                      ------------
</TABLE>
 
- ------------------------
(A) Includes the three months ended December 31, 1995 for Oncometrics.
 
               See accompanying notes to the pro forma condensed
                        combining financial statements.
 
                                      F-33
<PAGE>
                  ACCUMED INTERNATIONAL, INC. AND SUBSIDIARIES
             PRO FORMA CONDENSED COMBINING STATEMENT OF OPERATIONS
                     FOR THE YEAR ENDED SEPTEMBER 30, 1995
                                  (UNAUDITED)
<TABLE>
<CAPTION>
                                                                                                         PRO FORMA
                                                                                               -----------------------------
                                             HISTORICAL                                                          ACCUMED,
                                            -------------                                                      AS ADJUSTED,
                                               ACCUMED                 HISTORICAL                              FOR THE YEAR
                                            INTERNATIONAL  ----------------------------------                      ENDED
                                             YEAR ENDED                  SENSITITRE SENSITITRE                 SEPTEMBER 30,
                                            SEPTEMBER 30,    ACCUMED        US         UK                          1995
                                                1995           (A)          (B)        (B)      ADJUSTMENTS         (C)
                                            -------------  ------------  ---------  ---------  --------------  -------------
<S>                                         <C>            <C>           <C>        <C>        <C>             <C>
Sales.....................................   $   514,776   $  2,609,233  $ 409,360  $ 639,561  $ (193,000)(6)   $ 3,465,154
Cost of sales.............................    (1,431,187)    (1,510,143)  (247,860)  (457,056)    109,000(7)     (2,106,059)
                                            -------------  ------------  ---------  ---------  --------------  -------------
Gross profit (loss).......................      (916,411)     1,099,090    161,500    182,505     (84,000)        1,359,095
                                            -------------  ------------  ---------  ---------  --------------  -------------
Operating expenses:
  General and administration..............     2,094,890      1,040,083    208,420     74,589     100,000(8)      1,423,092
  Research and development................       386,882        453,277         --     88,872          --           542,149
  Sales and marketing.....................       309,208      1,187,177         --         --          --         1,187,177
                                            -------------  ------------  ---------  ---------  --------------  -------------
Total operating expenses..................     2,790,980      2,680,537    208,420    163,461     100,000         3,152,418
                                            -------------  ------------  ---------  ---------  --------------  -------------
Operating income (loss)...................    (3,707,391)    (1,581,447)   (46,920)    19,044    (184,000)       (1,793,323)
Other income (expense):
  Interest income.........................         7,949         12,930         --         --          --            12,930
  Interest expense........................       (46,657)       (40,201)        --         --     (35,475)(9)       (75,676)
  Other income............................        32,566          1,308         --         --          --             1,308
  Other expense...........................       (45,777)            --         --         --          --                --
                                            -------------  ------------  ---------  ---------  --------------  -------------
Earnings (loss) before income taxes and
 minority interest........................    (3,759,310)    (1,607,410)   (46,920)    19,044    (219,475)       (1,854,761)
Provision for income taxes................           800             --         --         --          --                --
                                            -------------  ------------  ---------  ---------  --------------  -------------
Net earnings (loss) before minority
 interest.................................    (3,760,110)    (1,607,410)   (46,920)    19,044    (219,475)       (1,854,761)
                                            -------------  ------------  ---------  ---------  --------------  -------------
Minority interest.........................            --             --         --         --          --                --
                                            -------------  ------------  ---------  ---------  --------------  -------------
Net earnings (loss).......................   $ 3,760,110)  $ (1,607,410) $ (46,920) $  19,044  $ (219,425)      $(1,854,761)
                                            -------------  ------------  ---------  ---------  --------------  -------------
                                            -------------  ------------  ---------  ---------  --------------  -------------
Net loss per equivalent share.............   $     (0.59)  $      (0.92)                                        $     (1.06)
                                            -------------  ------------                                        -------------
                                            -------------  ------------                                        -------------
Weighted average shares outstanding (F)...     6,375,627      1,748,940                                           1,748,940
                                            -------------  ------------                                        -------------
                                            -------------  ------------                                        -------------
 
<CAPTION>
                                                      PRO FORMA
                                            -----------------------------
                                                               ACCUMED
                                                            INTERNATIONAL
                                                             AS ADJUSTED   HISTORICAL
                                                            FOR THE YEAR   -----------
                                                                ENDED      ONCOMETRICS
                                                            SEPTEMBER 30,    IMAGING
                                                                1995          CORP.
                                             ADJUSTMENTS         (D)           (E)       ADJUSTMENTS     PRO FORMA
                                            --------------  -------------  -----------  --------------  -----------
<S>                                         <C>             <C>            <C>          <C>             <C>
Sales.....................................  $       --       $ 3,979,930    $ 164,552   $        --     $ 4,144,482
Cost of sales.............................          --        (3,537,246)    (137,034)           --      (3,674,280)
                                            --------------  -------------  -----------  --------------  -----------
Gross profit (loss).......................          --           442,684       27,518            --         470,202
                                            --------------  -------------  -----------  --------------  -----------
Operating expenses:
  General and administration..............     284,570 (10     3,802,552      229,225       108,000(4)    4,139,777
  Research and development................          --           929,031      961,248            --       1,890,279
  Sales and marketing.....................          --         1,496,385                         --       1,496,385
                                            --------------  -------------  -----------  --------------  -----------
Total operating expenses..................     284,570         6,227,968    1,190,473       108,000       7,526,441
                                            --------------  -------------  -----------  --------------  -----------
Operating income (loss)...................    (284,570)       (5,785,284)  (1,162,955)     (108,000)     (7,056,239)
Other income (expense):
  Interest income.........................          --            20,879           --            --          20,879
  Interest expense........................          --          (122,333)          --            --        (122,333)
  Other income............................          --            33,874           --            --          33,874
  Other expense...........................          --           (45,777)          --            --         (45,777)
                                            --------------  -------------  -----------  --------------  -----------
Earnings (loss) before income taxes and
 minority interest........................    (284,570)       (5,899,441)  (1,162,955)     (108,000)     (7,169,596)
Provision for income taxes................          --               800           --                           800
                                            --------------  -------------  -----------  --------------  -----------
Net earnings (loss) before minority
 interest.................................    (284,570)       (5,899,441)  (1,162,955)     (108,000)     (7,170,396)
                                            --------------  -------------  -----------  --------------  -----------
Minority interest.........................          --                --           --       430,000(5)      430,000
                                            --------------  -------------  -----------  --------------  -----------
Net earnings (loss).......................  $ (284,570)      $(5,899,441)  ($1,162,955) $   322,000     $(6,740,396)
                                            --------------  -------------  -----------  --------------  -----------
                                            --------------  -------------  -----------  --------------  -----------
Net loss per equivalent share.............                   $     (0.60)                               $     (0.69)
                                                            -------------                               -----------
                                                            -------------                               -----------
Weighted average shares outstanding (F)...                     9,831,682                                  9,831,682
                                                            -------------                               -----------
                                                            -------------                               -----------
</TABLE>
 
- ----------------------------------
 
(A)  Includes the  twelve months  and nine months  ended September  30, 1995 for
    AccuMed, Inc. and Sensititre US/UK, respectively.
 
(B) Includes the three months ended  December 31, 1994, before the  acquisitions
    by AccuMed, Inc.
 
(C)  AccuMed Consolidated includes AccuMed,  Inc., Sensititre US, and Sensititre
    UK, Ltd. after purchase accounting adjustments
 
(D) AccuMed International Consolidated includes AccuMed International  (formerly
    Alamar   Biosciences,  Inc.),   and  AccuMed   Consolidated  after  purchase
    accounting adjustments.
 
(E) Includes the twelve months ended August 31, 1995 for Oncometrics.
 
(F) Weighted average shares outstanding are 9,831,682 which represents 6,375,627
    shares for AccuMed International before the merger plus the weighted average
    (3,456,055) of  the  4,178,104  shares  (6,178,104  shares  per  the  merger
    agreement  less 2,000,000  shares issued  but subject  to forfeiture)  to be
    issued in connection with  the AccuMed merger.  The weighted average  shares
    outstanding  for AccuMed gives effect to the shares issued by AccuMed during
    the year ended September 30,1995 using the exchange ratio of 1.98 to 1.  The
    total  shares outstanding at  September 30, 1995  are 15,107,443 (10,929,339
    shares of  AccuMed International  and 4,178,104  shares issued  to  AccuMed)
    which   does  not  include  the  2,000,000  shares  issued  but  subject  to
    forfeiture.
 
               See accompanying notes to the pro forma condensed
                          combining financial statements.
 
                                      F-34
<PAGE>
                 ACCUMED INTERNATIONAL, INC., AND SUBSIDIARIES
                     NOTES TO PRO FORMA CONDENSED COMBINING
                              FINANCIAL STATEMENTS
                                  (UNAUDITED)
 
NOTE A -- DESCRIPTION OF ACQUISITIONS
    On December 29, 1995, AccuMed International (the "Company") (formerly Alamar
Biosciences, Inc.) acquired all of the  common stock of AccuMed, which  included
the  recent acquisition of certain assets  and assumption of certain liabilities
of Sensititre US and Sensititre  Ltd. by AccuMed. Pursuant  to the terms of  the
merger  agreement, the Company  issued 3,931,401 unconditional  shares of common
stock valued at $4,422,826 and 237,840 warrants valued at $68,252. An additional
1,881,910 shares and  126,945 warrants  were issued to  AccuMed shareholders  on
December  29, 1995, however, such shares and warrants are contingent and subject
to forfeiture if  specified performance  goals are  not achieved  by the  merged
entity  during  the 24  months  beginning January  1,  1996. In  March  1996 the
contingency associated  with 940,955  shares and  63,472 warrants  was  resolved
(performance goal achieved) resulting in contingent consideration of $5,430,326.
The  remaining  contingent consideration  will be  recorded  when the  goals are
achieved and will  be computed  based upon  the stock  price on  such date.  The
acquisition has been accounted for using the purchase method of accounting.
 
   
    In August, 1996, the Company entered into definitive agreements to acquire a
66%  interest in Oncometrics Imaging Corp. (Oncometrics), for approximately $4.0
million in cash. The closing of this transaction is subject to the execution  of
a  definitive Transaction Agreement and the satisfaction of conditions customary
in such agreements. It  is expected that the  acquisition will be accounted  for
using the purchase method of accounting and that a portion of the purchase price
will be charged to acquired in-process research and development in the period in
which the transaction is consummated.
    
 
   
    In  August, 1996, the Company entered into a definitive agreement to acquire
the remaining 90% interest  in Radco Ventures,  Inc. (Radco), for  approximately
$1.4 million in cash. The closing of this transaction is subject to the approval
of  the  Radco  Stockholders and  the  satisfaction of  conditions  customary in
acquisition agreements. It is  expected that the  acquisition will be  accounted
for  using the purchase method of accounting  and that a portion of the purchase
price will be  charged to acquired  in-process research and  development in  the
period in which the transaction is consummated.
    
 
NOTE B -- PRO FORMA ADJUSTMENTS
    The following adjustments are reflected in the Pro Forma Condensed Combining
Financial Statements under the columns headed "Adjustments".
 
   
 (1) Purchase Price Allocation-Oncometrics
    To  reflect  the  estimated  allocation of  the  $4  million  purchase price
    associated with the proposed acquisition of the 66% interest in Oncometrics.
    The purchase price will be  paid from the net  proceeds of the Offering  and
    has been reflected in the Pro Forma Condensed Combining Balance Sheet as Due
    to Xillix Technologies Corp. The allocation of the purchase price represents
    an  estimate  of  the fair  value  of  the assets  acquired  and liabilities
    assumed, includes approximately $1.6 million of acquired in-process research
    and development and $1.1  million of purchased  technology and reflects  the
    33%  minority interest holdings.  The Pro Forma  Condensed Combining Balance
    Sheet reflects the  estimated $1.6 million  of acquired in-process  research
    and  development as Intangible Assets. Such amount  will be written off as a
    charge to  earnings  in  the  period  subsequent  to  the  acquisition.  The
    allocation  is subject  to change and  is not necessarily  indicative of the
    ultimate purchase price allocation.
    
 
 (2) Purchase Price Allocation -- Radco
    To reflect  the estimated  allocation  of the  $1.4 million  purchase  price
    associated  with the proposed  acquisition of the  remaining 90% interest in
    Radco.   The    purchase    price    will   be    paid    from    the    net
 
                                      F-35
<PAGE>
                 ACCUMED INTERNATIONAL, INC., AND SUBSIDIARIES
                     NOTES TO PRO FORMA CONDENSED COMBINING
                        FINANCIAL STATEMENTS (CONTINUED)
                                  (UNAUDITED)
 
NOTE B -- PRO FORMA ADJUSTMENTS (CONTINUED)
    proceeds  of The Offering and has been  reflected in The Pro Forma Condensed
    Combining Balance Sheet as Due to Radco Ventures, Inc. The allocation of the
    purchase price  represents an  estimate  of the  fair  value of  the  assets
    acquired  and  liabilities assumed  and  includes approximately  $630,000 of
    acquired in-process  research  and  development.  The  Pro  Forma  Condensed
    Combining   Balance  Sheet  reflects  the  estimated  $630,000  of  acquired
    in-process research and development as  Intangible Assets. Such amount  will
    be  written off  as a  charge to  earnings in  the period  subsequent to the
    acquisition. The  allocation is  subject to  change and  is not  necessarily
    indicative of the ultimate purchase price allocation.
 
   
 (3) Acquired In-Process Research and Development
    The  estimated  charges  of  approximately  $1.6  million  and  $630,000 for
    acquired in-process research and development relating to the Oncometric  and
    Radco  acquisitions, respectively, are not reflected in the accompanying Pro
    Forma Condensed Combining Statements of Operations. Such amounts will result
    in a charge to earnings in the period subsequent to the acquisitions.
    The charge for acquired in-process research and development relating to  the
    AccuMed acquisition is not reflected in the accompanying Pro Forma Condensed
    Combined  Statements of  Operations for the  year ended  September 30, 1995.
    This charge in the amount of  approximately $4.0 million has been  reflected
    in  the  historical  financial  results  of  AccuMed  International  in  the
    accompanying Pro Forma Condensed Combining  Statement of Operations for  the
    three  months ended December 31, 1995. In addition, a charge of $3.5 million
    relating to the allocation of purchase price to acquire in-process  research
    and development following the resolution of a portion of the contingency has
    been  reflected in the historical financial results of AccuMed International
    in the accompanying  Pro Forma Condensed  Combining Statement of  Operations
    for the six months ended June 30, 1996.
    
 
 (4) Amortization of Intangibles
    To  reflect the amortization of the excess  of cost over net assets acquired
    and purchased technology of Oncometrics using the straight-line method  over
    10 years.
 
 (5)  To reflect the  minority interest share  (33%) of net  loss of Oncometrics
    Imaging Corp.
 
 (6)  To  eliminate  intercompany  sales  from  AccuMed  International   Limited
    (formerly Sensititre UK Ltd.) to AccuMed (formerly Sensititre U.S.).
 
 (7) To eliminate intercompany profit from the cost of product sold from AccuMed
    International  Limited (formerly  Sensititre UK  Ltd.) to  Accumed (formerly
    Sensititre U.S.).
 
 (8) To  reduce  amortization expense  ($20,000)  for the  amortization  of  the
    purchase  price of AccuMed  in excess of  the fair market  value of acquired
    assets, less assumed  liabilities, and transaction  costs incurred with  the
    acquisition  of  AccuMed,  amortized over  a  10  year life,  and  to adjust
    amortization expense for Sensititre U.S., and Sensititre UK Ltd.
    Adjustment to  reflect  a  reasonable  estimation  ($120,000)  of  corporate
    overhead costs for the three months ended December 31, 1994 carve out period
    for  Sensititre U.S. The estimate is based on a percentage of total sales of
    Radiometer America Inc., (of  which Sensititre U.S. was  a division) to  the
    Sensititre U.S. product line.
 
 (9)  To adjust interest expense for $35,475, assuming that the $430,000 loan to
    finance the Sensititre acquisition occurred on October 1, 1994.
 
                                      F-36
<PAGE>
                 ACCUMED INTERNATIONAL, INC., AND SUBSIDIARIES
                     NOTES TO PRO FORMA CONDENSED COMBINING
                        FINANCIAL STATEMENTS (CONTINUED)
                                  (UNAUDITED)
 
NOTE B -- PRO FORMA ADJUSTMENTS (CONTINUED)
 (10)To adjust amortization expense for  the amortization of the purchase  price
    of  AccuMed in  excess of  the fair  market value  of acquired  assets, less
    assumed liabilities,  and  transaction costs  incurred  with the  Merger  of
    AccuMed,  amortized over a 10 year  life, and to adjust amortization expense
    for Sensititre U.S., and Sensititre UK Ltd.
 
                                      F-37
<PAGE>



                         { INSIDE BACK COVER }
===========================================================================
- ---------------------------------------------------------------------------
                                   The graphic consists of three 
                                   photographs. The first photograph is
                                   of the ACCELL SERIES 2000 workstation
                                   being operated by a cytotechnologist 
                                   along with the caption "The ACCELL 
                                   SERIES 2000 workstation operated by a
                                   cytotechnologist. The AcCell Series 2000
                                   is an interactive computer-controlled 
                                   slide handling and precision microscopy
                                   workstation that is supported with 
                                   comprehensive data management 
                                   capabilities."



The second photograph is of the AcCell 2000 
with MacroVision along with the caption 
"The AcCell 2000 configured with the MacroVision
image enhancement option. MacroVision permits
on-screen display of the specimen being reviewed
under the microscope."




                                   The third photograph is of the ARIS 
                                   Sensititre Product along with the 
                                   caption "The ARIS, one of four 
                                   microbiology testing products offered 
                                   by the Company under the Sensititre 
                                   trade name. The ARIS is a fully-
                                   automated panel handling, incubating 
                                   and reading instrument."


<PAGE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
    NO  DEALER,  SALES  REPRESENTATIVE  OR ANY  OTHER  PERSON  IS  AUTHORIZED IN
CONNECTION WITH ANY OFFERING MADE HEREBY TO GIVE ANY INFORMATION OR TO MAKE  ANY
REPRESENTATION  NOT CONTAINED HEREIN AND, IF  GIVEN OR MADE, SUCH INFORMATION OR
REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE  COMPANY
OR  THE UNDERWRITERS. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL, OR A
SOLICITATION OF AN OFFER TO BUY, ANY SECURITY OTHER THAN THE SECURITIES  OFFERED
HEREBY, NOR DOES IT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO
BUY  ANY  SUCH SECURITIES  TO  ANY PERSON  IN ANY  JURISDICTION  IN WHICH  IT IS
UNLAWFUL TO MAKE  SUCH AN OFFER  OR SOLICITATION. NEITHER  THE DELIVERY OF  THIS
PROSPECTUS  NOR ANY SALE MADE HEREUNDER SHALL UNDER ANY CIRCUMSTANCES CREATE ANY
IMPLICATION THAT THERE HAS BEEN  NO CHANGE IN THE  AFFAIRS OF THE COMPANY  SINCE
THE  DATE HEREOF OR THAT  THE INFORMATION CONTAINED HEREIN  IS CORRECT AS OF ANY
DATE SUBSEQUENT TO THE DATE HEREOF.
 
                           --------------------------
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                                    PAGE
                                                    -----
<S>                                              <C>
Prospectus Summary.............................           3
Risk Factors...................................           6
The Company....................................          19
Use of Proceeds................................          20
Price Range Of Common Stock....................          21
Dividend Policy................................          21
Capitalization.................................          22
Dilution.......................................          23
Selected Consolidated Financial Data...........          24
Management's Discussion and Analysis of
 Financial Condition and Results of
 Operations....................................          25
Business.......................................          30
Management.....................................          45
Certain Relationships and Related
 Transactions..................................          55
Principal and Selling Stockholders.............          57
Description of Capital Stock...................          61
Underwriting...................................          65
Change in Independent Accountants..............          66
Available Information..........................          66
Incorporation of Certain Documents by
 Reference.....................................          67
Additional Information.........................          68
Legal Matters..................................          68
Experts........................................          68
Index to Consolidated Financial Statements.....         F-1
</TABLE>
    
 
                            ------------------------
 
                                4,750,000 SHARES
 
                                     [LOGO]
 
                                  COMMON STOCK
 
                             ---------------------
 
                                   PROSPECTUS
 
                             ---------------------
 
                     Vector Securities International, Inc.
 
                                 Tucker Anthony
                                  Incorporated
 
                                           , 1996
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
 
    The   following  table  sets  forth  the  costs  and  expenses,  other  than
underwriting discounts and  commissions, payable  by the  Company in  connection
with the issuance and distribution of the securities being registered hereunder.
All of the amounts shown are estimates (except for the SEC and NASD registration
fees).
 
   
<TABLE>
<CAPTION>
SEC registration fee...........................................  $  10,003
<S>                                                              <C>
NASD registration fee..........................................      3,401
Printing and engraving expenses................................    175,000
Accounting fees and expenses...................................    100,000
Legal fees and expenses........................................    450,000
Blue Sky fees and expenses.....................................     30,000
Miscellaneous..................................................     12,446
                                                                 ---------
    TOTAL......................................................  $ 780,850
                                                                 ---------
                                                                 ---------
</TABLE>
    
 
    None  of these expenses will be paid by the Selling Stockholders pursuant to
the terms of the agreements  under which the shares of  Common Stock to be  sold
hereby are being registered.
 
ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
    The  Company  has  provisions  in  its  Certificate  of  Incorporation which
eliminate the  liability of  the  Company's directors  to  the Company  and  its
stockholders  for  monetary  damages  to the  fullest  extent  permissible under
Delaware law  and  provisions  which  authorize the  Company  to  indemnify  its
directors  and agents by Bylaws, agreements  or otherwise, to the fullest extent
permitted by law. Such limitation of liability does not affect the  availability
of  equitable remedies  such as injunctive  relief or  rescission. The Company's
Bylaws provide that the  Company shall indemnify its  directors and officers  to
the  fullest extent permitted by Delaware  law, including circumstances in which
indemnification is otherwise discretionary under Delaware law.
 
    The Company's  officers  and  directors  are covered  by  a  directors'  and
officers'  liability  insurance  policy  maintained by  the  Company.  Under the
insurance policy,  the  Company  is  entitled to  be  reimbursed  for  indemnity
payments that it is required or permitted to make to its directors and officers.
 
ITEM 16.  EXHIBITS AND INDEX OF EXHIBITS.
 
    (a) Exhibits. The following exhibits are filed herewith.
 
   
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER    DESCRIPTION
- ----------  -----------------------------------------------------------------------------------------------------
<C>         <S>
     1.1    Form of Underwriting Agreement.*
     3.1    Certificate of Incorporation of the Registrant (incorporated by reference to the Registrant's
             Transition Report on Form 10-KSB for the transition period ended December 31, 1995 (the "Transition
             Report")).
     3.2    Bylaws of the Registrant (incorporated by reference to the Transition Report).
     4.1    Specimen stock certificate for Common Stock (incorporated by reference to the Transition Report).
     4.2    Certificate of Appointment of American Stock Transfer & Trust Company as Transfer Agent and Registrar
             (incorporated by reference to Pre-Effective Amendment No. 4 to the Registration Statement on Form
             S-1 (Reg. No. 33-48302), filed with the Commission on October 9, 1993 ("Pre-Effective Amendment No.
             4 to Form S-1")).
</TABLE>
    
 
                                      II-1
<PAGE>
   
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER    DESCRIPTION
- ----------  -----------------------------------------------------------------------------------------------------
     4.3    Warrant Agreement between the Registrant and American Equities Overseas, Inc. dated as of September
             1, 1995 (incorporated by reference to the Registrant's Registration Statement on Form S-3 (Reg. No.
             33-98902), filed with the Commission on October 31, 1995 (the "Form S-3")).
<C>         <S>
     4.4    Securities Purchase Agreement between the Registrant and G&G Dispensing, Inc. dated as of March 22,
             1994 (incorporated by reference to the Form S-3).
     4.5    Common Stock Purchase Warrant dated as of March 22, 1994 by the Registrant in favor of G&G
             Dispensing, Inc. (incorporated by reference to the Form S-3).
     4.6    Form of Warrant Agreement between the Registrant and Commonwealth Associates dated as of December 31,
             1994 (incorporated by reference to the Form S-3).
     4.7    Form of Common Stock Purchase Warrant dated as of December 31, 1994 by the Registrant in favor of
             Commonwealth Associates, Inc. (incorporated by reference to the Form S-3).
     4.8    Warrant Agreement between the Registrant and Commonwealth Associates dated as of May 9, 1995
             (incorporated by reference to the Form S-3).
     4.9    Form of Common Stock Purchase Warrant dated as of May 9, 1995 by the Registrant in favor of
             Commonwealth Associates, Inc. (incorporated by reference to the Form S-3).
     4.10   Warrant Agreement between the Registrant and Commonwealth Associates dated as of August 22, 1995
             (incorporated by reference to the Form S-3).
     4.11   Form of Common Stock Purchase Warrant dated as of August 22, 1995 by the Registrant in favor of
             Commonwealth Associates (incorporated by reference to the Form S-3).
     4.12   Form of Letter Agreement between the Registrant and John Robinson dated as of February 21, 1995
             (incorporated by reference to the Form S-3).
     4.13   Form of Registration Rights Agreement between the Registrant and John Robinson dated as of February
             21, 1995 (incorporated by reference to the Form S-3).
     4.14   Form of Common Stock Purchase Warrant dated as of December 29, 1995 by the Registrant in favor of
             Commonwealth Associates (incorporated by reference to the Post-Effective Amendment No. 1 to the
             Registrant's Registration Statement on Form S-3 (Reg. No. 33-98902), filed with the Commission on
             May 30, 1996 ("Post-Effective Amendment No. 1 to Form S-3")).
     4.15   Form of Warrant Agreement between the Registrant and Commonwealth Associates dated as of December 29,
             1995 pertaining to Warrants to purchase up to 750,000 shares of Common Stock of the Company
             (incorporated by reference to the Post-Effective Amendment No. 1 to Form S-3).
     4.16   Warrant Certificate dated as of December 29, 1995 registered in the name of The P.L. Thomas Group,
             Inc. representing the right to purchase up to 237,840 shares of Common Stock of the Registrant
             (incorporated by reference to the Post-Effective Amendment No. 1 to the Form S-3).
     4.17   Warrant Certificate dated as of December 29, 1995 registered in the name of The P.L. Thomas Group,
             Inc. representing the right to purchase up to 63,473 shares of Common Stock of the Registrant
             (incorporated by reference to the Post-Effective Amendment No. 1 to the Form S-3).
     4.18   Warrant Certificate dated as of December 29, 1995 registered in the name of The P.L. Thomas Group,
             Inc. representing the right to purchase up to 63,472 shares of Common Stock of the Registrant
             (incorporated by reference to the Post-Effective Amendment No. 1 to the Form S-3).
</TABLE>
    
 
                                      II-2
<PAGE>
   
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER    DESCRIPTION
- ----------  -----------------------------------------------------------------------------------------------------
     4.19   Warrant Agreement dated as of January 25, 1996 between the Registrant and Robert Priddy (incorporated
             by reference to the Post-Effective Amendment No. 1 to the Form S-3).
<C>         <S>
     4.20   Warrant Certificate dated as of January 25, 1996 registered in the name of Robert Priddy representing
             the right to purchase 100,000 shares of Common Stock of the Registrant (incorporated by reference to
             the Post-Effective Amendment No. 1 to the Form S-3).
     4.21   Form of Warrant Agreement between the Registrant and Commonwealth Associates dated as of December 29,
             1995 pertaining to Warrants to purchase up to 104,000 shares of Common Stock of the Registrant,
             including form of Warrant Certificate issued to designees of Commonwealth Associates dated as of
             December 29, 1995 representing the right to purchase up to an aggregate of 104,000 shares of Common
             Stock of the Registrant (incorporated by reference to the Post-Effective Amendment No. 1 to the Form
             S-3).
     4.22   Form of Warrant Agreement dated March 14, 1996 between the Registrant and certain of the Selling
             Securityholders, including form of Warrant Certificate evidencing right to purchase Common Stock at
             $3.42 per share (incorporated by reference to the Post-Effective Amendment No. 1 to the Form S-3).
     4.23   Form of Warrant Agreement dated March 14, 1996 between the Registrant and certain of the Selling
             Securityholders, including form of Warrant Certificate evidencing right to purchase Common Stock at
             $3.87 per share (incorporated by reference to the Post-Effective Amendment No. 1 to the Form S-3).
     5.1    Opinion of Graham & James LLP, counsel to the Registrant, regarding the legality of the securities
             offered hereby.
    10.1    Agreement and Plan of Reorganization dated as of April 21, 1995 between the Registrant and AccuMed,
             Inc., as amended by Amendment No. 1 dated as of August 1, 1995 and Amendment No. 2 dated as of
             October 6, 1995 (incorporated by reference to the Registrant's Registration Statement on Form S-4
             (File No. 33-99680), filed with the Commission on November 22, 1995 (the "Form S-4")).
    10.2    The Registrant's Board of Directors Compensation Plan (the "Plan") (incorporated by reference to
             Exhibit 10.11 to Form S-1) with Minutes of Board of Directors meeting dated January 18, 1996
             amending the Plan by authorizing grants of stock options to non-employee directors (incorporated by
             reference to the Transition Report). (2)
    10.3    Sale and Leaseback Agreement between the Registrant and Leasetec, Inc. (incorporated by reference to
             the Registration Statement on Form S-1 (Reg. No. 33-48302), filed with the Commission on June 3,
             1992 ("Form S-1")).
    10.4    Employment Agreement between the Registrant and Peter P. Gombrich dated August 1, 1994 (incorporated
             by reference to the Transition Report).(2)
    10.5    Employment Letter between the Registrant and Kenneth Miller dated March 2, 1995 (incorporated by
             reference to the Transition Report).(2)
    10.6    Employment Letter between the Registrant and Mark L. Santor dated February 28, 1995 (incorporated by
             reference to the Transition Report).(2)
    10.7    Employment Letter between the Registrant and Michael Burke dated April 21, 1995 (incorporated by
             reference to the Transition Report).(2)
    10.8    Employment Agreement between the Registrant and Norman J. Pressman dated June 13, 1996 and Addendum
             to Employment Agreement between the Registrant and Norman J. Pressman dated July 16, 1996. (1)(2)
</TABLE>
    
 
                                      II-3
<PAGE>
   
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER    DESCRIPTION
- ----------  -----------------------------------------------------------------------------------------------------
    10.9    European Distributor Agreement, dated November 22, 1993, by and between the Registrant and Sclavo
             (incorporated by reference to Exhibit 10.22 to the Registrant's Annual Report on Form 10-KSB for the
             year ended September 30, 1994 (the "1994 10-K")).
<C>         <S>
    10.10   United States Distributor Agreement, dated November 22, 1993, by and between the Registrant and
             Sclavo (incorporated by reference to the 1994 10-K).
    10.11   Joint Research and Development Agreement, dated November 22, 1993, by and between the Registrant and
             Sclavo (incorporated by reference to Exhibit 10.24 to the 1994 10-K).
    10.12   Securities Purchase Agreement, dated November 22, 1993, by and between the Registrant and Sclavo
             (incorporated by reference to Exhibit 10.25 to the 1994 10-K).
    10.13   Escrow Agreement dated as of March 22, 1994, between the Registrant and G&G Dispensing, Inc.
             (incorporated by reference to Exhibit 10.13 to the Form S-4).
    10.14   License Agreement between the Registrant and Becton, Dickinson and Company effective as of October
             11, 1995 (incorporated by reference to Exhibit 10.17 to the Form S-4).
    10.15   Research and Development Service Agreement between the Registrant and RADCO Ventures, Inc. dated
             March 15, 1996.(1)+
    10.16   License and Distribution Agreement dated February 20, 1996 between the Registrant and BioKit, S.A.
             (incorporated by reference to the Transition Report).
    10.17   1995 Stock Option Plan (incorporated by reference to the Transition Report). (2)
    10.18   Amendment No. 1 to the Registrant's 1995 Stock Option Plan. (2)
    10.19   Form of Non-Qualified Stock Option Agreement governing options granted to former employees of
             AccuMed, Inc. pursuant to the Agreement and Plan of Reorganization dated as of April 21, 1995, as
             amended (incorporated by reference to the Transition Report). (2)
    10.20   Form of Non-Qualified Stock Option Agreement governing options granted to employees and consultants
             under the 1995 Stock Option Plan (incorporated by reference to the Transition Report). (2)
    10.21   Form of Incentive Stock Option Agreement Governing options granted to employees under the 1995 Stock
             Option Plan (incorporated by reference to the Transition
             Report). (2)
    10.22   Amended and Restated 1990 Stock Option Plan (incorporated by reference to the Form S-1). (2)
    10.23   The Registrant's Amended and Restated 1992 Stock Option Plan (incorporated by reference to
             Pre-Effective Amendment No. 1 to Form SB-2, filed with the Commission on November 8, 1993). (2)
    10.24   Lease between the Registrant and NCP, LTD dated February 20, 1995 pertaining to the offices located
             at 29299 Clemens, Suite I-K, Westlake, Ohio 44145 (incorporated by reference to the Transition
             Report).
    10.25   Franklin Square Commercial Lease dated July 13, 1994 between the Registrant and the Lumber Company as
             Agent for the Beneficiary of LaSalle National Trust, N.A. pertaining to the premises located at
             Suite 401, 4th Floor North, 900 North Franklin Street, Chicago, Illinois (incorporated by reference
             to the Transition Report).
    10.26   Rider 1 to Franklin Square Commercial Lease between the Registrant and the Lumber Company dated May
             30, 1996.(1)
    10.27   License Agreement dated July 6, 1994, between the Registrant, Vanellus AB, and Uppsala
             Bildbehandlings AB (incorporated by reference to the Transition Report).
</TABLE>
    
 
                                      II-4
<PAGE>
   
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER    DESCRIPTION
- ----------  -----------------------------------------------------------------------------------------------------
    10.28   Collaboration Agreement and Worldwide Exclusive License between the Registrant and G&G Dispensing,
             Inc. dated March 22, 1994.(1)
<C>         <S>
    10.29   Form of Custody Agreement by each of the Selling Stockholders.(1)
    10.30   Form of Lock-Up Agreement between each of the Selling Stockholders and the Underwriters.(1)
    10.31   Form of Irrevocable Power of Attorney of Selling Stockholders.(1)
    10.32   O.E.M. Supply Agreement between Olympus America, Inc., Precision Instrument division and the
             Registrant dated March 31, 1996.(1)+
    10.33   Securities Purchase Agreement dated May 31, 1996 among the Registrant, Kingdon Associates, L.P.,
             Kingdon Partners, L.P., and Kingdon Offshore N.V. (incorporated by reference to the Registrant's
             Registration Statement on Form S-3 (Reg. No. 333-07681), filed with the Commission on July 3, 1996).
    10.34   Promissory Note in the original principal amount of $61,000 made May 22, 1996 by Peter P. Gombrich in
             favor of the Registrant.(1)
    10.35   Non-negotiable Promissory Note in the original principal amount of $775,000 made July 22, 1996 by the
             Registrant in favor of RADCO Ventures, Inc.(1)
    10.36   Employment Separation Agreement and Release between the Registrant and Kenneth D. Miller dated June
             27, 1996.(1)(2)
    10.37   Employment Separation Agreement and Release between the Registrant and Mark L. Santor dated June 10,
             1996.(1)(2)
    10.38   Amended and Restated Employment Separation Agreement and Release between the Registrant, Kenneth D.
             Miller and RADCO Ventures, Inc., dated August 8, 1996. (2)
    10.39   Share Purchase Agreement between the Registrant and Xillix Technologies Corp. dated as of August 16,
             1996.
    10.40   Subscription Agreement between the Registrant and Oncometrics Imaging Corp. dated as of August 16,
             1996.
    10.41   Stock Purchase Agreement by and among the Registrant, RADCO Ventures, Inc. and the Selling
             Stockholders named therein dated as of August 15, 1996.
    23.1    Consent of Graham & James, LLP (contained in Exhibit 5.1).
    23.2    Consent of Coopers & Lybrand LLP.
    23.3    Consent of Coopers & Lybrand (UK).
    23.4    Consent of KPMG Peat Marwick LLP.
    23.5    Consent of KPMG.
    23.6    Consent of Banner & Allegreti, Ltd. (1)
    23.7    Consent of Townsend and Townsend and Crew. (1)
    24.1    Powers of Attorney included on signature page to this Pre-effective Amendment No. 1, with respect to
             Mr. Lavallee, and the signature page of the Registration Statement previously filed with the
             Commission, with respect to all other signatories.
</TABLE>
    
 
- ------------------------
   
*   To be filed by amendment.
    
 
   
(1) Previously filed with the Registration Statement on July 26, 1996.
    
 
   
(2)  Represents  a  management  contract  or  compensatory  plan  or arrangement
    required to be filed as an exhibit to this Registration Statement.
    
 
+   Confidential treatment requested as to certain portions.
 
                                      II-5
<PAGE>
ITEM 17.  UNDERTAKINGS.
 
    The undersigned registrant hereby undertakes:
 
        (1) That,  for  the  purpose  of determining  any  liability  under  the
    Securties  Act, the Registrant will treat  the information ommitted from the
    form of Prospectus filed  as part of this  Registration Statement as of  the
    time the Commission declares it effective.
 
        (2)  That,  for  the  purpose of  determining  any  liability  under the
    Securities Act, each such post-effective amendment  shall be deemed to be  a
    new  registration statement relating to  the securities offered therein, and
    the offering of  such securities  at that  time shall  be deemed  to be  the
    initial bona fide offering thereof.
 
    Insofar  as indemnification for liabilities arising under the Securities Act
of 1933  (the "Securities  Act") may  be permitted  to directors,  officers  and
controlling  persons of  the Company  pursuant to  the foregoing  provisions, or
otherwise, the Company has  been advised that in  the opinion of the  Securities
and  Exchange  Commission  such  indemnification  is  against  public  policy as
expressed in the Securities Act and  is, therefore, unenforceable. In the  event
that  a  claim  for indemnification  against  such liabilities  (other  than the
payment by the Company of  expenses incurred or paid  by a director, officer  or
controlling  person of the Company in the successful defense of any action, suit
or proceeding) is asserted  by such director, officer  or controlling person  in
connection with the securities being registered, the Company will, unless in the
opinion  of its  counsel the matter  has been settled  by controlling precedent,
submit to  a  court  of  appropriate  jurisdiction  the  question  whether  such
indemnification  by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.
 
                                      II-6
<PAGE>
                                   SIGNATURES
 
   
    Pursuant  to the requirements of the  Securities Act of 1933, the Registrant
certifies that  it  has  reasonable grounds  to  believe  it meets  all  of  the
requirements for filing on Form S-2 and duly caused this Pre-effective Amendment
No.  1 to  the Registration  Statement on  Form S-2  (Reg. No.  333-09011) to be
signed on its behalf by the  undersigned, hereunto duly authorized, in the  City
of Chicago, State of Illinois on August 28, 1996.
    
 
                                          ACCUMED INTERNATIONAL, INC.
 
                                          By:        /s/ PETER P. GOMBRICH
 
                                             -----------------------------------
                                                      Peter P. Gombrich
                                                   CHIEF EXECUTIVE OFFICER
 
                               POWER OF ATTORNEY
 
   
    KNOW  ALL PERSONS BY  THESE PRESENTS, that Paul  F. Lavallee constitutes and
appoints, jointly and severally, Peter P. Gombrich and Mark L. Santor, and  each
of them, attorneys-in-fact for him, each with the power of substitution, for him
in  any and all capacities, to sign  any and all amendments to this Registration
Statement  (including  post-effective  amendments)  and  any  new   registration
statement  filed under  Rule 462(b)  under the Securities  Act of  1933) and any
post-effective amendment  thereto,  and to  file  the same,  with  all  exhibits
thereto,  and other documents  in connection therewith,  with the Securities and
Exchange  Commission,  hereby  ratifying  and  confirming  that  each  of   said
attorneys-in-fact  or his substitute or substitutes  may lawfully do or cause to
be done by virtue hereof.
    
 
   
    In accordance with  the requirements  of the  Securities Act  of 1933,  this
Pre-effective  Amendment No. 1  to the Registration Statement  on Form S-2 (Reg.
No. 333-09011) has been signed by the following persons in the capacities and on
the dates stated.
    
 
   
<TABLE>
<C>                                                     <S>                                    <C>
                      SIGNATURE                                         TITLE                         DATE
- ------------------------------------------------------  -------------------------------------  ------------------
 
                /s/ PETER P. GOMBRICH                   Chairman of the Board, Chief            August 28, 1996
     -------------------------------------------         Executive Officer and President
                 (Peter P. Gombrich)                     (Principal Executive Officer)
 
                  /s/ MARK L. SANTOR                    Chief Financial Officer (Principal      August 28, 1996
     -------------------------------------------         Financial and Accounting Officer)
                   (Mark L. Santor)
 
                 /s/ JOHN H. ABELES*                    Director                                August 28, 1996
     -------------------------------------------
                   (John H. Abeles)
 
                 /s/ HAROLD S. BLUE*                    Director                                August 28, 1996
     -------------------------------------------
                   (Harold S. Blue)
 
                /s/ JACK H. HALPERIN*                   Director                                August 28, 1996
     -------------------------------------------
                  (Jack H. Halperin)
</TABLE>
    
 
                                      II-7
<PAGE>
   
<TABLE>
<C>                                                     <S>                                    <C>
                 /s/ PAUL F. LAVALLEE                   Director                                August 28, 1996
     -------------------------------------------
                  (Paul F. Lavallee)
 
              /s/ JOSEPH W. PLANDOWSKI*                 Director                                August 28, 1996
     -------------------------------------------
                (Joseph W. Plandowski)
 
               /s/ LEONARD M. SCHILLER*                 Director                                August 28, 1996
     -------------------------------------------
                (Leonard M. Schiller)
 
               * /s/ PETER P. GOMBRICH
      -------------------------------------------
                   Peter P. Gombrich,
                  as Attorney-in-fact
</TABLE>
    
 
                                      II-8
<PAGE>
                               INDEX TO EXHIBITS
 
   
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER    DESCRIPTION
- ----------  -----------------------------------------------------------------------------------------------------
<C>         <S>
     1.1    Form of Underwriting Agreement.*
     3.1    Certificate of Incorporation of the Registrant (incorporated by reference to the Registrant's
             Transition Report on Form 10-KSB for the transition period ended December 31, 1995 (the "Transition
             Report")).
     3.2    Bylaws of the Registrant (incorporated by reference to the Transition Report).
     4.1    Specimen stock certificate for Common Stock (incorporated by reference to the Transition Report).
     4.2    Certificate of Appointment of American Stock Transfer & Trust Company as Transfer Agent and Registrar
             (incorporated by reference to Pre-Effective Amendment No. 4 to the Registration Statement on Form
             S-1 (Reg. No. 33-48302), filed with the Commission on October 9, 1993 ("Pre-Effective Amendment No.
             4 to Form S-1")).
     4.3    Warrant Agreement between the Registrant and American Equities Overseas, Inc. dated as of September
             1, 1995 (incorporated by reference to the Registrant's Registration Statement on Form S-3 (Reg. No.
             33-98902), filed with the Commission on October 31, 1995 (the "Form S-3")).
     4.4    Securities Purchase Agreement between the Registrant and G&G Dispensing, Inc. dated as of March 22,
             1994 (incorporated by reference to the Form S-3).
     4.5    Common Stock Purchase Warrant dated as of March 22, 1994 by the Registrant in favor of G&G
             Dispensing, Inc. (incorporated by reference to the Form S-3).
     4.6    Form of Warrant Agreement between the Registrant and Commonwealth Associates dated as of December 31,
             1994 (incorporated by reference to the Form S-3).
     4.7    Form of Common Stock Purchase Warrant dated as of December 31, 1994 by the Registrant in favor of
             Commonwealth Associates, Inc. (incorporated by reference to the Form S-3).
     4.8    Warrant Agreement between the Registrant and Commonwealth Associates dated as of May 9, 1995
             (incorporated by reference to the Form S-3).
     4.9    Form of Common Stock Purchase Warrant dated as of May 9, 1995 by the Registrant in favor of
             Commonwealth Associates, Inc. (incorporated by reference to the Form S-3).
     4.10   Warrant Agreement between the Registrant and Commonwealth Associates dated as of August 22, 1995
             (incorporated by reference to the Form S-3).
     4.11   Form of Common Stock Purchase Warrant dated as of August 22, 1995 by the Registrant in favor of
             Commonwealth Associates (incorporated by reference to the Form S-3).
     4.12   Form of Letter Agreement between the Registrant and John Robinson dated as of February 21, 1995
             (incorporated by reference to the Form S-3).
     4.13   Form of Registration Rights Agreement between the Registrant and John Robinson dated as of February
             21, 1995 (incorporated by reference to the Form S-3).
     4.14   Form of Common Stock Purchase Warrant dated as of December 29, 1995 by the Registrant in favor of
             Commonwealth Associates (incorporated by reference to the Post-Effective Amendment No. 1 to the
             Company's Registration Statement on Form S-3 (Reg. No. 33-98902), filed with the Commission on May
             30, 1996 ("Post-Effective Amendment No. 1 to Form S-3")).
     4.15   Form of Warrant Agreement between the Registrant and Commonwealth Associates dated as of December 29,
             1995 pertaining to Warrants to purchase up to 750,000 shares of Common Stock of the Company
             (incorporated by reference to the Post-Effective Amendment No. 1 to Form S-3).
     4.16   Warrant Certificate dated as of December 29, 1995 registered in the name of The P.L. Thomas Group,
             Inc. representing the right to purchase up to 237,840 shares of Common Stock of the Registrant
             (incorporated by reference to the Post-Effective Amendment No. 1 to the Form S-3).
</TABLE>
    
<PAGE>
   
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER    DESCRIPTION
- ----------  -----------------------------------------------------------------------------------------------------
<C>         <S>
     4.17   Warrant Certificate dated as of December 29, 1995 registered in the name of The P.L. Thomas Group,
             Inc. representing the right to purchase up to 63,473 shares of Common Stock of the Registrant
             (incorporated by reference to the Post-Effective Amendment No. 1 to the Form S-3).
     4.18   Warrant Certificate dated as of December 29, 1995 registered in the name of The P.L. Thomas Group,
             Inc. representing the right to purchase up to 63,472 shares of Common Stock of the Registrant
             (incorporated by reference to the Post-Effective Amendment No. 1 to the Form S-3).
     4.19   Warrant Agreement dated as of January 25, 1996 between the Registrant and Robert Priddy (incorporated
             by reference to the Post-Effective Amendment No. 1 to the Form S-3).
     4.20   Warrant Certificate dated as of January 25, 1996 registered in the name of Robert Priddy representing
             the right to purchase 100,000 shares of Common Stock of the Registrant (incorporated by reference to
             the Post-Effective Amendment No. 1 to the Form S-3).
     4.21   Form of Warrant Agreement between the Registrant and Commonwealth Associates dated as of December 29,
             1995 pertaining to Warrants to purchase up to 104,000 shares of Common Stock of the Registrant,
             including form of Warrant Certificate issued to designees of Commonwealth Associates dated as of
             December 29, 1995 representing the right to purchase up to an aggregate of 104,000 shares of Common
             Stock of the Registrant (incorporated by reference to the Post-Effective Amendment No. 1 to the Form
             S-3).
     4.22   Form of Warrant Agreement dated March 14, 1996 between the Registrant and certain of the Selling
             Securityholders, including form of Warrant Certificate evidencing right to purchase Common Stock at
             $3.42 per share (incorporated by reference to the Post-Effective Amendment No. 1 to the Form S-3).
     4.23   Form of Warrant Agreement dated March 14, 1996 between the Registrant and certain of the Selling
             Securityholders, including form of Warrant Certificate evidencing right to purchase Common Stock at
             $3.87 per share (incorporated by reference to the Post-Effective Amendment No. 1 to the Form S-3).
     5.1    Opinion of Graham & James LLP, counsel to the Registrant, regarding the legality of the securities
             offered hereby.
    10.1    Agreement and Plan of Reorganization dated as of April 21, 1995 between the Registrant and AccuMed,
             Inc., as amended by Amendment No. 1 dated as of August 1, 1995 and Amendment No. 2 dated as of
             October 6, 1995 (incorporated by reference to the Registrant's Registration Statement on Form S-4
             (File No. 33-99680), filed with the Commission on November 22, 1995 (the "Form S-4")).
    10.2    The Registrant's Board of Directors Compensation Plan (the "Plan") (incorporated by reference to
             Exhibit 10.11 to Form S-1) with Minutes of Board of Directors meeting dated January 18, 1996
             amending the Plan by authorizing grants of stock options to non-employee directors (incorporated by
             reference to the Transition Report). (2)
    10.3    Sale and Leaseback Agreement between the Registrant and Leasetec, Inc. (incorporated by reference to
             the Registration Statement on Form S-1 (Reg. No. 33-48302), filed with the Commission on June 3,
             1992 ("Form S-1")).
    10.4    Employment Agreement between the Registrant and Peter P. Gombrich dated August 1, 1994 (incorporated
             by reference to the Transition Report).(2)
    10.5    Employment Letter between the Registrant and Kenneth Miller dated March 2, 1995 (incorporated by
             reference to the Transition Report).(2)
    10.6    Employment Letter between the Registrant and Mark L. Santor dated February 28, 1995 (incorporated by
             reference to the Transition Report).(2)
    10.7    Employment Letter between the Registrant and Michael Burke dated April 21, 1995 (incorporated by
             reference to the Transition Report).(2)
</TABLE>
    
<PAGE>
   
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER    DESCRIPTION
- ----------  -----------------------------------------------------------------------------------------------------
<C>         <S>
    10.8    Employment Agreement between the Registrant and Norman J. Pressman dated June 13, 1996 and Addendum
             to Employment Agreement between the Registrant and Norman J. Pressman dated July 16, 1996. (1)(2)
    10.9    European Distributor Agreement, dated November 22, 1993, by and between the Company and Sclavo
             (incorporated by reference to Exhibit 10.22 to the Registrant's Annual Report on Form 10-KSB for the
             year ended September 30, 1994 (the "1994 10-K")).
    10.10   United States Distributor Agreement, dated November 22, 1993, by and between the Registrant and
             Sclavo (incorporated by reference to the 1994 10-K).
    10.11   Joint Research and Development Agreement, dated November 22, 1993, by and between the Registrant and
             Sclavo (incorporated by reference to Exhibit 10.24 to the 1994 10-K).
    10.12   Securities Purchase Agreement, dated November 22, 1993, by and between the Registrant and Sclavo
             (incorporated by reference to Exhibit 10.25 to the 1994 10-K).
    10.13   Escrow Agreement dated as of March 22, 1994, between the Registrant and G&G Dispensing, Inc.
             (incorporated by reference to Exhibit 10.13 to the Form S-4).
    10.14   License Agreement between the Registrant and Becton, Dickinson and Company effective as of October
             11, 1995 (incorporated by reference to Exhibit 10.17 to the Form S-4).
    10.15   Research and Development Service Agreement between the Registrant and RADCO Ventures, Inc. dated
             March 15, 1996.(1)+
    10.16   License and Distribution Agreement dated February 20, 1996 between the Registrant and BioKit, S.A.
             (incorporated by reference to the Transition Report).
    10.17   1995 Stock Option Plan (incorporated by reference to the Transition Report). (2)
    10.18   Amendment No. 1 to the Registrant's 1995 Stock Option Plan. (2)
    10.19   Form of Non-Qualified Stock Option Agreement governing options granted to former employees of
             AccuMed, Inc. pursuant to the Agreement and Plan of Reorganization dated as of April 21, 1995, as
             amended (incorporated by reference to the Transition Report). (2)
    10.20   Form of Non-Qualified Stock Option Agreement governing options granted to employees and consultants
             under the 1995 Stock Option Plan (incorporated by reference to the Transition Report). (2)
    10.21   Form of Incentive Stock Option Agreement Governing options granted to employees under the 1995 Stock
             Option Plan (incorporated by reference to the Transition
             Report). (2)
    10.22   Amended and Restated 1990 Stock Option Plan (incorporated by reference to the
             Form S-1). (2)
    10.23   The Registrant's Amended and Restated 1992 Stock Option Plan (incorporated by reference to
             Pre-Effective Amendment No. 1 to Form SB-2, filed with the Commission on November 8, 1993). (2)
    10.24   Lease between the Registrant and NCP, LTD dated February 20, 1995 pertaining to the offices located
             at 29299 Clemens, Suite I-K, Westlake, Ohio 44145 (incorporated by reference to the Transition
             Report).
    10.25   Franklin Square Commercial Lease dated July 13, 1994 between the Registrant and the Lumber Company as
             Agent for the Beneficiary of LaSalle National Trust, N.A. pertaining to the premises located at
             Suite 401, 4th Floor North, 900 North Franklin Street, Chicago, Illinois (incorporated by reference
             to the Transition Report).
    10.26   Rider 1 to Franklin Square Commercial Lease between the Registrant and the Lumber Company dated May
             30, 1996.(1)
    10.27   License Agreement dated July 6, 1994, between the Registrant, Vanellus AB, and Uppsala
             Bildbehandlings AB (incorporated by reference to the Transition Report).
</TABLE>
    
<PAGE>
   
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER    DESCRIPTION
- ----------  -----------------------------------------------------------------------------------------------------
<C>         <S>
    10.28   Collaboration Agreement and Worldwide Exclusive License between the Registrant and G&G Dispensing,
             Inc. dated March 22, 1994.(1)
    10.29   Form of Custody Agreement by each of the Selling Stockholders.(1)
    10.30   Form of Lock-Up Agreement between each of the Selling Stockholders and the Underwriters.(1)
    10.31   Form of Irrevocable Power of Attorney of Selling Stockholders.(1)
    10.32   O.E.M. Supply Agreement between Olympus America, Inc., Precision Instrument division and the
             Registrant dated March 31, 1996.(1)+
    10.33   Securities Purchase Agreement dated May 31, 1996 among the Registrant, Kingdon Associates, L.P.,
             Kingdon Partners, L.P., and Kingdon Offshore N.V. (incorporated by reference to the Registrant's
             Registration Statement on Form S-3 (Reg. No. 333-07681), filed with the Commission on July 3, 1996).
    10.34   Promissory Note in the original principal amount of $61,000 made May 22, 1996 by Peter P. Gombrich in
             favor of the Registrant.(1)
    10.35   Non-negotiable Promissory Note in the original principal amount of $775,000 made July 22, 1996 by the
             Registrant in favor of RADCO Ventures, Inc.(1)
    10.36   Employment Separation Agreement and Release between the Registrant and Kenneth D. Miller dated June
             27, 1996.(1)(2)
    10.37   Employment Separation Agreement and Release between the Registrant and Mark L. Santor dated June 10,
             1996.(1)(2)
    10.38   Amended and Restated Employment Separation Agreement and Release between the Registrant, Kenneth D.
             Miller and RADCO Ventures, Inc., dated August 8, 1996. (2)
    10.39   Share Purchase Agreement between the Registrant and Xillix Technologies Corp. dated as of August 16,
             1996.
    10.40   Subscription Agreement between the Registrant and Oncometrics Imaging Corp. dated as of August 16,
             1996.
    10.41   Stock Purchase Agreement by and among the Registrant, RADCO Ventures, Inc. and the Selling
             Stockholders named therein dated as of August 15, 1996.
    23.1    Consent of Graham & James, LLP (contained in Exhibit 5.1).
    23.2    Consent of Coopers & Lybrand LLP.
    23.3    Consent of Coopers & Lybrand (UK).
    23.4    Consent of KPMG Peat Marwick LLP.
    23.5    Consent of KPMG.
    23.6    Consent of Banner & Allegreti, Ltd.
    23.7    Consent of Townsend and Townsend and Crew.
    24.1    Powers of Attorney included on signature page to this Pre-effective Amendment No. 1, with respect to
             Mr. Lavallee, and the signature page of the Registration Statement previously filed with the
             Commission, with respect to all other signatories.
</TABLE>
    
 
- ------------------------
   
*   To be filed by amendment.
    
 
   
(1) Previously filed with the Registration Statement on July 26, 1996.
    
 
   
(2)  Represents  a  management  contract  or  compensatory  plan  or arrangement
    required to be filed as an exhibit to this Registration Statement.
    
 
+   Confidential treatment requested as to certain portions.

<PAGE>


                                     [Letterhead]

August 29, 1996

AccuMed International, Inc.
900 N. Franklin Street, Suite 401
Chicago, Illinois 60610

Gentlemen:

You have requested our opinion as counsel for AccuMed International, Inc., a 
Delaware corporation (the "Company"), and as special counsel for the Selling 
Stockholders (as defined below) in connection with the registration under the 
Securities Act of 1933, as amended (the "Act"), and the Rules and Regulations 
promulgated thereunder, and the public offering by the Company of 2,831,455 
shares (the "Primary Shares") of the Common Stock, $0.01 par value per share 
(the "Common Stock"), and by certain stockholders (the "Selling 
Stockholders") of 1,918,545 shares of the Common Stock, together with up to 
an additional 712,500 shares of the Common Stock to cover over-allotments, if 
any, (collectively, the "Secondary Shares" and together with the Primary 
Shares, the "Shares"), to Vector Securities International, Inc. and Tucker 
Anthony Incorporated, as representatives of the underwriters.

This opinion is rendered pursuant to Item 601(b)(5)(i) of Regulation
S-B promulgated under the Act.

For purposes of this opinion, we have examined the Company's Registration
Statement on Form S-2 filed with the Securities and Exchange Commission (the
"Commission") on July 26, 1996 (the "Registration Statement"), as amended by
Pre-effective Amendment No.1 filed with the Commission on the date hereof
including the prospectus which is a part thereof (the "Prospectus"), and the
form of Underwriting Agreement between the Company and Vector Securities
International, Inc. and Tucker Anthony Incorporated, as representatives of the
underwriters (the "Underwriting Agreement").  We have also been furnished with
and have examined originals or copies, certified or otherwise identified to our
satisfaction, of all such records of the Company, agreements and other
instruments, certificates of officers and representatives of the Company,
certificates of public officials and other documents as we have deemed it
necessary to require as a basis for the opinions hereafter expressed.  As to
questions of fact material to such opinions, we have, where relevant facts were
not independently established, relied upon

<PAGE>

AccuMed International, Inc.
August 29, 1996
Page 2

certificates by principal officers of the Company.  We have made such further
legal and factual examination and investigation as we deem necessary for
purposes of rendering the following opinions.

In our examination we have assumed the genuineness of all signatures, the legal
capacity of natural persons, the correctness of facts set forth in certificates,
the authenticity of all documents submitted to us as originals, the conformity
to original documents of all documents submitted to us as certificated or
photostatic copies, and the authenticity of the originals of such copies.  We
have also assumed that such documents have each been duly authorized, properly
executed and delivered by each of the parties thereto other than the Company.

We are members of the bar of the State of California.  Our opinions below are
limited to the laws of the State of California, the corporate laws of the State
of Delaware and the federal law of the United States.

Based on the foregoing, it is our opinion that all of the Shares, when sold,
issued and delivered in the manner described in the final Prospectus and in
accordance with the terms of the Underwriting Agreement, will be legally and
validly issued, fully paid nonassessable.

We consent to the filing of this opinion as an exhibit to the Registration
Statement and consent to the use of our name under the caption "Legal Matters"
in the Prospectus.


Very truly yours,


/s/ Graham & James LLP
- --------------------------
GRAHAM & JAMES LLP



<PAGE>


                           ACCUMED INTERNATIONAL, INC.

                             SECRETARY'S CERTIFICATE

     I, Mark L. Santor, Secretary of AccuMed International, a Delaware
corporation (the "Corporation"), hereby certify as follows:

     1.   Attached hereto as EXHIBIT A is a true, correct and complete copy of
the resolutions of the Board of Directors of the Corporation dated July 12, 1996
approving the increase in authorized number of shares issuable upon exercise of
options authorized to be granted under the Corporation's 1995 Stock Option Plan.
Such resolutions have not been modified, repealed or rescinded and remain in
full force and effect as of the date of this Certificate.

          IN WITNESS WHEREOF, I have executed this Certificate as Officer of the
Corporation this 15th day of August, 1996.


                                        /s/ Mark L. Santor
                                        ------------------------------------
                                         Mark L. Santor
                                         Secretary 

<PAGE>

                       AMENDMENT TO ACCUMED INTERNATIONAL, INC.
                                1995 STOCK OPTION PLAN

    AMENDMENT (this "Amendment") to the AccuMed International, Inc. (formerly
"Alamar Biosciences, Inc., the "Company") 1995 Stock Option Plan (the "Plan")
dated July 12, 1996.

    WHEREAS, the Plan currently provides for the grant of options to purchase
up to an aggregate of 1,500,000 shares of the Company's common stock, par value
of $.01 per share (the "Common Stock");

    WHEREAS, on July 12, 1996 the Board of Directors adopted resolutions
amending the Plan, subject to stockholder approval within 12 months thereafter,
to increase the number of shares available under the Plan and provide for the
grant of options to purchase an aggregate of 2,000,000 shares of the Common
Stock (a copy of such resolutions, certified by the Secretary of the Company are
attached hereto as EXHIBIT A);

    NOW, THEREFORE, in accordance with Section 11 of the Plan, the Plan is
hereby amended as follows:

    1.   Section 4 of the Plan is hereby deleted in its entirety and the
following is inserted in lieu thereof:

         Section 4.  SHARES AVAILABLE.  Subject to adjustment as
         provided in Section 16 of this Plan, 2,000,000 shares of the
         common stock, par value of $.01 per share, of the Company
         (the "COMMON STOCK"), shall be available for grants of options
         under this Plan.  To the extent an outstanding option expires
         or terminates unexercised or is canceled or forfeited, the
         shares of Common Stock subject to the expired, unexercised,
         canceled or forfeited portion of such option shall again be
         available for grants of options under this Plan.  Shares of
         Common Stock to be delivered under this Plan shall be
         authorized and unissued shares of Common Stock, or
         authorized and issued shares of Common Stock reacquired
         and held as treasury shares or otherwise or a combination
         thereof.

    All other provisions of the Plan shall remain in full force and effect.

<PAGE>


                                 AMENDED AND RESTATED
                     EMPLOYMENT SEPARATION AGREEMENT AND RELEASE

    This Amended and Restated Employment Separation Agreement and Release (the
"Agreement") is made and entered into as of this 8th day of August, 1996 by and
between Kenneth D. Miller, an individual ("Employee"), AccuMed International,
Inc. (together with its predecessor Alamar Biosciences Laboratory, Inc., its
parent, current and former subsidiaries, affiliates, predecessors, successors,
assigns, insurers, agents and employees, collectively referred to hereinafter as
"Employer") and RADCO Ventures, Inc. ("RADCO"), and the parties hereby agree as
follows:

    1.   Employee has voluntarily resigned from his employment with Employer
effective June 30, 1996.  During his employment with Employer, Employee will
retain the title of corporate Senior Vice President and acting President of
RADCO, and will report to Employer's CEO, Peter P. Gombrich.  In addition,
during his employment with Employer, Employee will be on special assignment for
the Microbiology Division.  Employee acknowledges that he resigned as a
corporate officer effective May 7, 1996.  Employee will be paid his regular
salary and benefits through his last day of employment.  It is understood and
agreed that Employee may seek other employment opportunities and may, upon
reasonable notice to Employer, change the date of his resignation to an earlier
date.

    2.   Employer has requested, and Employee has agreed, that during the
months of July, August, September and October, 1996 Employee will spend 70% of
his time during the course of the normal work week, discharging the
responsibilities of RADCO as its acting President, and as a consultant to
Employer.  For these services Employee will receive compensation from RADCO and
Employer, at the rate of:

         a.   RADCO compensation            $4,250.00 per month

         b.   Employer compensation         $1,875.00 per month

    3.   Employer acknowledges that as of this date, Employee has vested
options to purchase 140,000 shares (25,000 shares at $1.13 per share and 115,000
shares at $1.39 per share) of AccuMed

<PAGE>

stock pursuant to his Incentive Stock Option Agreements with Alamar Biosciences,
Inc.  These options will continue to be governed by the Incentive Stock Option
Agreements dated June 21, 1991 and May 22, 1992 and correspondence relating
thereto, and Employee shall have no greater rights pursuant to this Agreement
than he had under those Agreements.  Provided, however, that notwithstanding the
terms of the Incentive Stock Option Agreements Employee's options must be
exercised on or before September 30, 1996, or they will be forfeited, canceled,
terminated, and of no further effect, and they may not be exercised thereafter.
Employee has reserved the right to discuss with his tax accountant and attorney
regarding potential tax liability that may be incurred by exercising his options
that could affect his accord with the Agreement, and further, reserves the right
to have Section 3. in the Agreement modified, mutually agreeable to Employer and
Employee, at a date future (but not later than June 30th, 1996) to reasonably
reduce potentially excessive tax liability.  The Employer agrees to this
reservation so long as it is acknowledged by Employee that the Employer is not
offering any further monetary compensation.

    4.   Employee will be paid all submitted business expenses on or before
June 30, 1996.  Employee will be paid $8662.37 in accrued vacation time and
$7,437.00 for relocation gross-up in three equal monthly payments beginning July
15, 1996 and the last payment being made September 15,1996.  If Employee signs
this Agreement after it is tendered to him, and signs the Acknowledgment
attached as Exhibit A after his employment terminates, and if Employee does not
revoke his signatures on this Agreement or the Acknowledgment to this Agreement,
Employee will be paid Two Thousand Six Hundred Twenty-Five Dollars ($2625) per
month less applicable taxes and deductions for four months on the 15th and the
last day of each month for a period of four months, beginning on July 15, 1996
and ending on October 31, 1996; and commencing November 15, 1996 and for the
next four months (November and December 1996 and January and February 1997) the
Employee will be paid the sum of Six Thousand One Hundred and Twenty-Five
Dollars ($6,125.00) per month on the 15th and the last day

<PAGE>

of each month, less any applicable taxes and deductions.  Said payments shall be
made regardless of continuance of the Employee consulting with Employer or
acting as President of RADCO. In addition, Employer will continue to pay for
Employer's portion of any health, dental and other insurance benefits that
Employee now receives, and that Employee is entitled to receive, through October
31, 1996.  Employee acknowledges that these payments greatly exceed the amount
otherwise due to him, and that they are payments made in consideration for his
entering into this Agreement.  Employee acknowledges that no further amounts are
due for salary, severance, bonus, vacation pay, stock options, pursuant to
contract or otherwise.  By these payments, Employer does not admit that it has
any liability to Employee for any reason whatsoever, and the entry into this
Agreement shall not constitute any admission of or evidence of any type of
unfair, unlawful, or improper conduct by Employer.  Rather, such payment is
solely for the purpose of settling forever any claims, actual or potential,
which Employee may have or believe he has, with respect to any events involving
his employment relationship with Employer or the termination of such
relationship.

    5.   Employee on his own behalf and on behalf of his heirs and assigns,
releases, forever discharges and covenants not to sue Employer with respect to
all claims, causes of action, suits, debts, sums of money, controversies,
agreements, promises, damages and demands whatsoever, including attorney's fees
and court costs, in law, equity or before any federal, state or local
administrative agency, for, on account of, or in relation to any contract of
employment and/or employment relationship between Employee and Employer, or the
termination of such relationship, which Employee has or may have as of the date
of this Agreement, including but not limited to claims under the Age
Discrimination in Employment Act.

    6.   Employee agrees that, during his employment with Employer, and for a
period of one year after his employment terminates, Employee shall not, either
alone or in association with others, directly

<PAGE>

or indirectly, whether as a proprietor, partner, director, officer, agent,
salesperson, consultant or otherwise: (a) solicit, or employ, or authorize to be
solicited for employment any persons who were, at any time within six (6) months
prior to the termination of Employee's employment, employees of the Employer; or
(b) in any other way divert, take away or interfere with any of the custom,
trade, business patronage of the cytopathology division and its products or
employees of the Employer.

    7.   Employee acknowledges that he has had access to and been involved in
strategic new product planning and development, and that the disclosure of this
information to competitors would cause irreparable harm to Employer.  Thus,
Employee further agrees that, during the term of his employment, and for a
period of one year after his employment terminates he will not seek or accept
employment or engage in any business as an officer, director, employee, partner,
agent, consultant or in any other individual or representative capacity, which
competes with Employer, or which is engaged in the development of cytopathology
products involved with automated microscopy and image analysis, including but
not limited to Neopath, Neuromedical Systems, Roche Imaging Systems, Cytyc and
Compucyte or their subsidiaries or affiliates.  Employee agrees that he will not
retain, use or disclose, directly or indirectly, any of Employer's confidential
information.  Employee understands and agrees that confidential information
includes, without limitation, all new product information, customer lists,
customer specifications, customer contact persons, specialized business methods,
techniques, computer data, plans and knowledge relating to the business of
Employer, advertising, marketing materials and concepts, customer information,
methods for developing and maintaining business relationships with clients and
prospective clients, prospective customer lists, procedural manuals, employee
training and review programs, price lists, payroll and personnel information,
cost information and any other confidential information or trade secrets that
may have been imparted to Employee by Employer, or which Employee has learned of
as a result of his employment with Employer.  Employee recognizes that

<PAGE>

this confidential information is a unique asset of Employer, developed and
perfected over a considerable time and at substantial expense to Employer and
the disclosure of which may cause injury, loss of profits and loss of goodwill
to Employer.  Employee agrees to protect the confidentiality and use of all
confidential information during his employment and thereafter.  Employee agrees
to keep all confidential documents in secure locations and not to use or reveal
any confidential information during the term of Employee's employment except as
necessary for the business purposes of Employer.  Employee agrees that he will
not use, disclose, copy, discuss, or disseminate any of Employer's confidential
information.

    8.   Employee acknowledges that all papers, photographs and apparatus
related to the business of Employer, including those prepared or made by
Employee, including but not limited to confidential information, new product
information, customer lists, records, and marketing materials, shall be and
remain at all times the property of Employer.  On or before the date his
employment terminates, Employee agrees to return to Employer any personal
property owned by Employer, including, but not limited to, samples, manuals,
schedules, equipment, reports, or files obtained by and through Employee's
employment by Employer, and all correspondence, written memoranda, diagrams,
books, computerized data and computer software, records, notebooks, films and
other documents, and all copies thereof relating in any way to any confidential
information about Employer, whether prepared by Employee or by others.

    9.   Employee states that the provisions of this Agreement are not a
hardship to him, that he has employment opportunities in fields other than the
development of cytopathology products, and that this Agreement will not prevent
him from obtaining employment.  Employee recognizes that Employer's market is
global, and agrees that this Agreement is reasonable despite the absence of any
geographic restriction.

<PAGE>

    10.  Employee understands that in the event of a violation or attempted 
violation of the provisions of this Agreement:  (a) Employer will suffer 
irreparable harm to its business for which Employer would have no adequate 
remedy at law; (b) Employer, in addition to any other remedies available in 
law or in equity, may seek from any court of competent jurisdiction an order 
enjoining Employee from any further violations or attempted violations of the 
provisions of this Agreement or compelling Employee to comply with the 
provisions of this Agreement; (c) Employee waives any and all rights to 
contest jurisdiction and venue in the courts of the County of Cook or the 
Northern District of Illinois over Employee for the purposes of enforcing 
this Agreement; and (d) Employee shall be liable for all damages resulting 
from such violations or attempted violations, including but not limited to 
the Employer's attorney's fees and court costs incurred in seeking to enforce 
this Agreement.

    11.  Employee authorizes Employer to open any mail received by it which 
is addressed to him, and is not marked Personal, including but not limited to 
mail received after the termination of Employee's employment.

    12.  Employee acknowledges that the provisions of the Confidential 
Disclosure Agreement between Employee and Alamar Biosciences Laboratory, 
Inc., which was entered into on or about August 31, 1989, remains in full 
force and effect, and reaffirms that he will abide by the terms of that 
Agreement.  A copy of that Agreement is attached hereto and made a part 
hereof as Exhibit B. Employee further acknowledges that the provisions of the 
Trade Secrets and Patent Agreement between Employee and AccuMed, which was 
entered into on or about April 12, 1996, remains in full force and effect, 
and reaffirms that he will abide by the terms of that Agreement.  A copy of 
that Agreement is attached hereto and made a part hereof as Exhibit C.

    13.  Employee agrees not to seek to be hired or rehired by Employer and 
not to seek to extend the period of his employment or relationship with 
Employer beyond June 30, 1996, and waives any future

<PAGE>

employment with Employer.  Notwithstanding the foregoing, it is understood 
and agreed that, upon mutual agreement of Employer and Employee, Employee may 
enter into a consulting agreement with Employer that is separate from and has 
no bearing upon this Agreement.

    14.  This Agreement is confidential, and Employee will not inform any 
person of its terms and conditions, except for his immediate family, attorney 
and those necessary for Employee's compliance with legal requirements.

    15.  Employer will respond to any telephone inquiries from prospective 
employers of Employee with information as to his length of service with 
Employer, the type of work which he performed, and his level of compensation. 
Employer will also provide a letter of reference in the form set forth in 
Exhibit D upon request.  Employer will not make any statements to prospective 
employers which could reasonably be expected to have an adverse impact on 
Employee's employment opportunities, nor will Employee make any statements 
which may reasonably be expected to adversely affect the business or 
reputation of Employer.  Employer agrees that Employer's CEO Peter Gombrich 
will accept telephone calls from prospective employers of Employee and will 
provide a fair and balanced reference.

    16.  Employee understands that the Agreement fully sets forth all 
separation benefits he will receive from Employer, and it supersedes any 
previous offers or promises, whether oral or written.  This Amended and 
Restated Employment Separation Agreement and Release supersedes and replaces 
the prior written agreement dated June 24, 1996.

<PAGE>

    17.  Employee acknowledges that he has fully read this Agreement, 
understands its terms, has been advised to consult with an attorney prior to 
signing this Agreement, has been given 21 days to consider this release and 
its ramifications, has been given 7 days after signing to rescind this 
Agreement, and is entering into this Agreement knowingly and voluntarily.

                             /s/ Kenneth D. Miller
                             -------------------------
                             Kenneth D. Miller



                             ACCUMED INTERNATIONAL, INC.


                             By: /s/ Peter P. Gombrich
                                 ---------------------
                             Peter P. Gombrich
                             Its Chairman and CEO


                             RADCO Ventures, Inc.


                             By: /s/ Kenneth D. Miller
                                 ---------------------
                             Its: Acting President
                                  --------------------

<PAGE>

                                   EXHIBIT A

                                ACKNOWLEDGMENT

     Employee acknowledges that his resignation was effective on June 30, 
1996, and that he agrees to all of the terms of this Amended and Restated 
Employment Separation Agreement and Release.



DATE: July 8, 1996                                  By: /s/ Kenneth D. Miller
      -------------                                     ----------------------
                                                        Kenneth D. Miller



<PAGE>


                               SHARE PURCHASE AGREEMENT


         THIS AGREEMENT made as of the 16th day of August, 1996.

BETWEEN:

         XILLIX TECHNOLOGIES CORP., a corporation duly incorporated and
         existing under the laws of the Province of British Columbia, Canada,
         having its registered office at 300 - 13775 Commerce Parkway,
         Richmond, British Columbia, Canada, V6V 2V4

         (the "Vendor")

AND:

         ACCUMED INTERNATIONAL, INC., a corporation duly incorporated and
         existing under the laws of the State of Delaware, United States of
         America, having its principal office at 900 N. Franklin, Suite 401,
         Chicago, Illinois, U.S.A., 60610

         (the "Purchaser")

WHEREAS:

A.       Oncometrics Imaging Corp. (the "Company") is a wholly-owned subsidiary
of the Vendor, which is a British Columbia publicly traded company;

B.       The Company was formed in 1995 for the purpose of acquiring from the
Vendor, and completing the development of, a proprietary technology for the
screening of high risk individuals for cancer, which is more particularly
described in Schedule "A" hereto (the "Technology");

C.       The Company has acquired and now owns or holds rights to the
Technology and certain related patents, patent applications, trademarks,
inventories, equipment and other assets, all of which are more particularly
described in Schedule "B" hereto (collectively, the "Assets");


<PAGE>


D.       The Purchaser has agreed to acquire a two-thirds equity interest in
the Company, by purchasing 1,000,000 Common shares of the Company from the
Vendor (the "Share Purchase") and by subscribing for and purchasing 1,000,000
Common shares from the Company (the "Share Subscription"), and the Vendor and
the Company have agreed to issue and/or sell such shares;

E.       The Purchaser, the Company and the Vendor have agreed that, upon the
completion of the Share Subscription, they will enter into a shareholders'
agreement defining their respective rights and obligations relating to the
Company (the "Shareholders Agreement");

F.       The Purchaser and the Company have agreed that, simultaneous with the
completion of the Share Subscription, they will enter into a letter agreement
setting forth the terms and conditions upon which the Purchaser will provide
certain manufacturing, marketing and quality control services to the Company in
respect of all of the development of all of its gynecological and sputum
products (the "Letter Agreement"); and

G.       The Parties have agreed that the completion of the Share Purchase, on
the terms and conditions set out in this Agreement, shall be conditional upon
and shall occur concurrently with the completion of the Share Subscription and
the execution of the Shareholders Agreement and the Letter Agreement.

         NOW THEREFORE THIS AGREEMENT WITNESSETH that in consideration of the
premises and the covenants, warranties and agreements hereinafter set forth (the
receipt and sufficiency of which is hereby acknowledged), the Parties hereby
agree as follows:

1.       INTERPRETATION

1.1      DEFINITIONS.  In this Agreement, unless the context otherwise
requires, the following terms shall have the respective meanings set out below:


                                          2

<PAGE>

    (a)  "ARM'S LENGTH", "NON-ARM'S LENGTH" and similar expressions have the
         meanings ascribed to them in the INCOME TAX ACT of Canada, as
         presently in force;

    (b)  "ASSETS" has the meaning ascribed thereto in Recital C;

    (c)  "B.C. ACT" means the SECURITIES ACT of British Columbia, as amended,
         together with all regulations, rules and policies from time to time
         thereunder;

    (d)  "CLOSING" has the meaning ascribed thereto in section 9.1;

    (e)  "CLOSING DATE" has the meaning ascribed thereto in section 9.1;

    (f)  "COMPANY" has the meaning ascribed thereto in Recital A;

    (g)  "FINANCIAL STATEMENTS" has the meaning ascribed thereto in
         section 3.1(n);

    (h)  "INDEMNIFIER" has the meaning ascribed thereto in section 10.5;

    (i)  "IP ASSETS" has the meaning ascribed thereto in section 3.1(ab);

    (j)  "LETTER AGREEMENT" has the meaning ascribed thereto in Recital F;

    (k)  "MATERIAL CONTRACTS" means all contracts and agreements to which the
         Company is a party or by which it is bound and which are material to
         the Assets or the business and operations of the Company, but, for
         greater certainty, do not include any contracts or agreements:

         (i)  which may be terminated by the Company, without the payment of
              any penalty or compensation, on not more than one month's notice;
              and


                                          3

<PAGE>


         (ii) which have been entered into in the ordinary course of business
              of the Company and which do not involve the expenditure of more
              than $10,000;

    (l)  "1933 ACT" means the SECURITIES ACT OF 1933 of the United States, as
         amended, together with all regulations, rules and policies from time
         to time thereunder;

    (m)  "OTHER" has the meaning ascribed thereto in section 10.5;

    (n)  "PARTIES" means the Vendor and the Purchaser, and "PARTY" means either
         one of them;

    (o)  "PERSON" means any individual, partnership, limited liability
         partnership, corporation, limited liability corporation, joint stock
         company, trust, unincorporated association, government, government
         agency, or other entity;

    (p)  "PURCHASED SHARES" has the meaning ascribed thereto in section 2.1;

    (q)  "PURCHASE PRICE" has the meaning ascribed thereto in section 2.1;

    (r)  "SHARE PURCHASE" has the meaning ascribed thereto in Recital D;

    (s)  "SHARE SUBSCRIPTION" has the meaning ascribed thereto in Recital D;

    (t)  "SHAREHOLDERS AGREEMENT" has the meaning ascribed thereto in
         Recital E;

    (u)  "STATEMENT DATE" means May 31, 1996, being the end of the period
         covered by the Financial Statements;

    (v)  "SUBSCRIPTION AGREEMENT" has the meaning ascribed thereto in section
         3.1(d);


                                          4

<PAGE>

    (w)  "TECHNOLOGY" has the meaning ascribed thereto in Recital B;

    (x)  "UNDERWRITTEN OFFERING" has the meaning ascribed thereto in
         section 7.1(h); and

    (y)  "VENDOR'S SHARES" has the meaning ascribed thereto in section 3.1(c).

1.2      DIVISIONS AND HEADINGS.  The division of this Agreement into sections
and the insertion of headings are for convenience of reference only and shall
not affect the construction or interpretation hereof.  All references in this
Agreement to a designated section or other subdivision is to the designated
section or other subdivision of this Agreement.

1.3      GENDER AND NUMBER.  Unless the context otherwise requires, words
importing the singular include the plural and vice versa and words importing
gender include all genders.

1.4      GOVERNING LAW.  This Agreement shall in all respects be governed by
and construed in accordance with the laws of the Province of British Columbia
and the laws of Canada applicable therein.

1.5      INVALIDITY.  The invalidity or unenforceability of any provision of
this Agreement shall not affect the validity or enforceability of any other
provision hereof and any such invalid or unenforceable provision shall be deemed
to be severable.

1.6      CURRENCY.  Unless otherwise indicated herein, all dollar amounts
referred to in this Agreement are expressed, and shall be paid, in lawful
currency of the United States of America.

1.7      ACCOUNTING TERMINOLOGY.  All accounting terms used but not defined in
this Agreement shall have the respective meanings ascribed thereto in accordance
with generally accepted accounting principles in 



                                          5

<PAGE>

Canada, as established and applied from time to time by the Canadian 
Institute of Chartered Accountants.

1.8      DESCRIPTION OF SCHEDULES.  The following are the schedules to this
Agreement, which form an integral part hereof:

         Schedule "A"   -    Description of Technology
         Schedule "B"   -    Description of Assets
         Schedule "C"   -    Employee Matters
         Schedule "D"   -    Financial Statements
         Schedule "E"   -    Material Contracts.

2.       PURCHASE AND SALE

2.1      PURCHASE OF SHARES.  On the basis of and subject to the terms and
conditions of this Agreement, the Purchaser agrees to purchase and the Vendor
agrees to sell, on the Closing Date, 1,000,000 Common shares without par value
in the capital of the Company (the "Purchased Shares"), for an aggregate
purchase price of Two Million ($2,000,000.00) Dollars (the "Purchase Price").

2.2      PAYMENT OF PURCHASE PRICE.  The Purchase Price shall be paid and
satisfied by the Purchaser by the delivery to the Vendor of a certified cheque
or bank draft in an amount equal to the Purchase Price, payable to the Vendor at
par in Vancouver, Canada, on the Closing Date.

3.       REPRESENTATIONS AND WARRANTIES

3.1      REPRESENTATIONS OF THE VENDOR.  The Vendor hereby warrants and
represents to the Purchaser that:

    (a)  the Company is a company duly incorporated, organized and validly
         existing and in good standing under the laws of the Province of
         British Columbia, Canada and is duly qualified to carry on business as
         a foreign corporation in each other jurisdiction where the failure to
         so qualify would have a


                                          6

<PAGE>

         material adverse effect on the business, financial condition or assets
         of the Company;

    (b)  the Company has all necessary corporate power, authority and right to
         own, lease and hold the properties and assets owned, leased or held by
         it (including, without limitation, the Assets) and to conduct its
         business as presently conducted and as proposed to be conducted;

    (c)  the entire authorized capital of the Company consists of 50,000,000
         Common shares without par value, of which the only issued and
         outstanding shares, prior to the completion of the Share Subscription,
         on the Closing Date, will be 2,000,000 Common shares (the "Vendor's
         Shares"), which will be held of record and beneficially owned by the
         Vendor, and which will have been duly authorized and validly issued as
         fully paid and non-assessable;

    (d)  there are no outstanding options, warrants, rights to subscribe, calls
         or commitments relating to, or securities or rights convertible into,
         shares in the capital of the Company, or contracts, commitments or
         arrangements obligating the Company to issue additional shares in its
         capital or warrants or rights to purchase or acquire any shares in its
         capital, other than the agreement of even date herewith between the
         Company and the Purchaser relating to the Share Subscription (the
         "Subscription Agreement");

    (e)  the Vendor is a company duly incorporated and validly existing under
         the laws of the Province of British Columbia, Canada, and has all
         necessary corporate power, authority and right to enter into, deliver,
         and perform its obligations under this Agreement, including, without
         limitation, to sell and transfer the Purchased Shares to the
         Purchaser;


                                          7

<PAGE>


    (f)  this Agreement has been duly and validly authorized, executed and
         delivered by the Vendor and constitutes a legal, valid and binding
         obligation of the Vendor, enforceable against it in accordance with
         its terms, except as enforcement may be limited by applicable
         bankruptcy laws or other similar laws affecting creditors' rights
         generally and by principles of equity;

    (g)  the Purchased Shares are held of record, and are legally and
         beneficially owned, by the Vendor, free and clear of all liens,
         mortgages, charges, encumbrances, security interests, options,
         restrictions and claims whatsoever, other than the restrictions to be
         contained in the Shareholders Agreement;

    (h)  no person other than the Purchaser has any agreement or option, or
         right capable of becoming an agreement or option, to acquire the
         Purchased Shares, or any part thereof or interest therein;

    (i)  the Vendor is "resident in Canada" for the purposes of section 116 of
         the INCOME TAX ACT of Canada;

    (j)  the execution, delivery and performance by the Vendor of this
         Agreement and the Shareholders Agreement, and the consummation of the
         transactions herein contemplated, does not and will not conflict with,
         or result in a breach of the terms of, or constitute a default under
         or violation of, any law or regulation of any governmental authority
         or any provision of the charter documents of either the Vendor or the
         Company or any provision of any indenture, contract or commitment to
         which either the Vendor or the Company is a party or otherwise
         subject;

    (k)  no consent, approval or authorization of any third party or of any
         governmental authority is required to be obtained on the part of the
         Vendor or the Company to permit the execution or delivery of this
         Agreement, the Shareholders Agreement or the


                                          8

<PAGE>

         Letter Agreement, or the consummation of the transactions contemplated
         hereby, except such consents, approvals and authorizations as have
         been obtained, or will have been obtained on or before the Closing
         Date;

    (l)  the Company has no subsidiaries and does not own, directly or
         indirectly, any shares of capital stock, partnership or other
         interests in any corporation, partnership, joint venture or other
         Person;

    (m)  the Company is conducting its business in material compliance with all
         applicable laws, rules and regulations of each jurisdiction in which
         its business is carried on and is duly licensed, registered or
         qualified in all jurisdictions in which it owns, holds, leases or
         operates its property or carries on business to enable its business to
         be carried on as now conducted and its property and assets to be
         owned, held, leased and operated, and all such licenses, registrations
         and qualifications are valid and subsisting and in good standing,
         except in respect of matters which do not and will not result in any
         material adverse change to the business, business prospects or
         condition (financial or otherwise) of the Company;

    (n)  the audited financial statements of the Company for the period ended
         May 31, 1996, a copy of which are attached as Schedule "D" hereto (the
         "Financial Statements"), present fairly, in all material respects, the
         financial position and results of the operations of the Company for
         the period then ended, and have been prepared by the management of the
         Company in accordance with Canadian generally accepted accounting
         principles, applied on a consistent basis;

    (o)  to the best of its knowledge, there are no liabilities, absolute,
         contingent or otherwise, of the Company which are not disclosed or
         reflected in the Financial Statements or in this Agreement, except:


                                          9

<PAGE>


         (i)  those incurred in the ordinary course of its business since the
              Statement Date;

        (ii)  those which are covered by existing insurance policies or are for
              amounts not greater than policy deductibles; and

       (iii)  the contingent liabilities arising pursuant to or in connection
              with the Material Contracts referred to in Schedule "E" hereto;
              and

        (iv)  any future loss by the Vendor relating to the collection of the
              final payment of $50,000 on the sale of a Cyto-Savant system to
              the University of Rochester pursuant to the agreement referred to
              in paragraph 5 of Part A of Schedule "E";

    (p)  the Company has not guaranteed, or agreed to guarantee, any debt,
         liability or other obligation of any Person, other than the debt
         referred to in section 3.1(o)(iv);

    (q)  all material transactions of the Company have been properly recorded
         or filed in or with its books and records and the minute book of the
         Company contains all records of the meetings and proceedings of the
         shareholders and directors thereof;

    (r)  the Company has not been required by law to file any tax returns or
         reports prior to the date hereof;

    (s)  there are no taxes payable for the current period for which tax
         returns are not yet required to be filed, there are no agreements,
         waivers or other arrangements providing for an extension of time with
         respect to the filing of any tax return by, or payment of, any tax,
         governmental charge or deficiency by the Company;


                                          10

<PAGE>


    (t)  there are no proceedings or actions in progress, pending or threatened
         against the Company for the assessment or the collection or remittance
         of taxes, charges, interests, penalties, instalments or other amounts
         and there are no material questions of taxation or assessment which
         are the subject of dispute with any taxing authority, or any grounds
         that could result in an assessment, reassessment, charge or
         potentially adverse determination by any taxation authority;

    (u)  since the Statement Date:

         (i)  no return of capital or other distribution of any kind on its
              shares has been declared or paid by the Company;

        (ii)  no capital expenditure or commitment therefor has been made by
              the Company in excess of $25,000;

       (iii)  the Company has carried on its business in the ordinary and
              normal course, in a prudent, businesslike and efficient manner,
              and substantially in accordance with the procedures and practices
              in effect on the Statement Date;

        (iv)  there has been no material adverse change in the financial
              position or condition of the Company and no damage, loss or
              destruction materially affecting the business or assets of the
              Company or its right or capacity to carry on such business; and

         (v)  the Company has not paid or agreed to pay any compensation,
              pension, bonus, share of profits or other benefit to, or for the
              benefit of, any employee, director or officer, except in the
              normal course of business and as disclosed or reflected in its
              books and records;

    (v)  the Company has good and marketable title to, or a valid license or
         other right to use, all of the material assets referred to in


                                          11

<PAGE>


         Schedule "B", except inventory disposed of, and changes in the working
         capital item, since the Statement Date in the ordinary course of
         business, free and clear of all liens, charges or encumbrances;

    (w)  Schedule "E" hereto sets forth a complete and accurate list of all
         Material Contracts to which the Company is a party or by which it is
         bound;

    (x)  no Person who is not at arm's length to the Company is now indebted to
         it on any account whatsoever;

    (y)  the Company is not indebted to any Person who is not at arm's length
         to it, except:

         (i)  as reflected in the Financial Statements;

        (ii)  for salaries or operating expenses accrued in the normal course
              of business; and

       (iii)  as expressly provided for or contemplated in this Agreement or
              the Subscription Agreement;

    (z)  the amount of the indebtedness of the Company to Western Economic
         Diversification Program as at July 31, 1996 was $307,726 (Canadian);

    (aa) the Company maintains such insurance against loss or damage to its
         assets and with respect to public liability as is reasonably prudent
         for a corporation operating similar businesses to that of the Company;

    (ab) set forth on Schedule "A" is a true and complete list of the
         Technology and set forth on Schedule "B" is a true and complete list
         of all the rights to the Technology and certain related patents,
         patent applications, trademarks, and copyrights or rights thereto


                                          12

<PAGE>


         owned or held by the Company (collectively, the "IP Assets") which
         constitutes all of the intangible property relating to the Technology
         and which is presently owned, licensed, possessed, used or held by the
         Company.  To the extent applicable, the list set forth in Schedule "B"
         specifies, among other things, the patent numbers and date of issue of
         each patent, the application number and date of application for each
         patent pending, the copyright registration numbers and date of grant,
         numbers and filing dates of all applications for copyright
         legislation, the numbers and dates of grants of all trademark
         registrations, the numbers and filing dates of all applications for
         trademark registrations.  The Company owns sufficient interest in and
         to the Technology to enable it to conduct its business as presently
         conducted and proposed to be conducted.  To the best of the Vendor's
         knowledge:

         (i)  no Person is infringing upon any of the IP Assets or has any
              claim which competes with the IP Assets;

        (ii)  all trade secrets relating to the Technology have been adequately
              safeguarded, have not been disclosed to any third parties who are
              not bound to maintain the confidentiality of such trade secrets;
              and

       (iii)  the conduct of the Company's business, including without
              limitation use of the Technology, does not infringe any patent,
              copyright, trademark, trade secret, trade name, or commercial
              name, registered or unregistered, or other intellectual property
              rights of third parties, and no claim is pending or has been made
              to such effect;

    (ac) the Company has 10 employees, particulars of which are set forth in
         Schedule "C", and is not a party to a collective agreement with any
         trade union;


                                          13

<PAGE>


    (ad) there are no pension, profit sharing, group insurance, deferred
         compensation or other similar plans affecting the Company, other than
         the plans referred to in Schedule "C";

    (ae) the Company does not hold, either directly or indirectly, a legal or
         beneficial interest in any real property, except by way of a lease of
         its office premises entered into in the normal course of business;

    (af) there are no actions, suits, judgments, investigations or proceedings
         of any kind whatsoever outstanding or pending or, to the best of the
         Vendor's knowledge, threatened, by or against or affecting the Company
         or its assets, at law or in equity or before or by any federal,
         provincial, state, municipal or other governmental department,
         commission, board, bureau or agency, domestic or foreign, of any kind
         whatsoever, which will materially adversely affect the business,
         operations or financial condition of the Company, or any of its assets
         or properties, or which materially adversely affect or may materially
         adversely affect the issuance and sale of the Purchased Shares or any
         action taken or to be taken by the Company pursuant to or in
         connection with this Agreement;

    (ag) the Vendor has received no notice of and the Company is not in default
         or breach of, and the execution and delivery and performance of and
         compliance with the terms of the Subscription Agreement, the
         Shareholders Agreement and the Letter Agreement does not and will not
         conflict with, or result in any breach of or the acceleration of any
         indebtedness under, or constitute a default under, any term or
         provision of the Memorandum, Articles or resolutions of the Company,
         or of any indenture, contract, agreement, instrument, lease or other
         document to which the Company is a party or by which it is bound, or
         any judgment, decree, order, statute, rule or regulation applicable to
         the Company, which default or breach might reasonably be expected to
         materially adversely affect the assets,


                                          14

<PAGE>


         business or condition (financial or otherwise) of the Company; and

    (ah) no securities commission or similar regulatory authority in Canada or
         United States has issued any order preventing or suspending trading in
         any securities of the Company.

3.2      REPRESENTATIONS OF THE PURCHASER.  The Purchaser warrants, represents
and acknowledges to the Vendor that:

    (a)  the Purchaser is a company duly incorporated, organized and validly
         existing under the laws of the State of Delaware;

    (b)  the Purchaser has all necessary power, authority and right to enter
         into and perform its obligations under this Agreement, including,
         without limitation, to purchase the Purchased Shares from the Vendor;

    (c)  this Agreement has been duly and validly authorized, executed and
         delivered by the Purchaser and constitutes a legal, valid and binding
         obligation of the Purchaser, enforceable against it in accordance with
         its terms, except as enforcement may be limited by applicable
         bankruptcy laws or other similar laws affecting creditors' rights
         generally and by principles of equity;

    (d)  no consent, approval or authorization of any third party or of any
         governmental authority is required to be obtained on the part of the
         Purchaser to permit the execution or delivery of this Agreement, the
         Shareholders Agreement or the Letter Agreement, or the consummation of
         the transactions contemplated hereby, except such consents, approvals
         or authorizations as have been obtained, or will have been obtained,
         on or before the Closing Date;

    (e)  the execution and delivery of this Agreement, the Shareholders
         Agreement and the Letter Agreement by the Purchaser and the


                                          15

<PAGE>


         performance of its obligations hereunder does not and will not
         conflict with or result in the breach or violation of any law or
         regulation of any governmental authority or any of the terms and
         provisions of the Certificate of Incorporation or Bylaws of the
         Purchaser or any indenture, agreement, contract or commitment to which
         the Purchaser is a party or otherwise subject;

    (f)  the issue and sale of the Purchased Shares to the Purchaser is being
         made in reliance upon exemptions from the requirements of the B.C. Act
         as to the involvement of a registered dealer, the filing of a
         prospectus and the delivery of an offering memorandum relating to the
         sale of the Purchased Shares, and, as a result, the Purchaser will be
         restricted from using most of the civil remedies available to it under
         such Act;

    (g)  the Purchased Shares have not been registered under the 1933 Act, or
         under any state securities laws, and may not be offered or sold in the
         United States unless registered thereunder or unless an exemption from
         such requirements is available;

    (h)  the Purchaser is an "accredited investor" as that term is defined in
         Regulation D promulgated under the 1933 Act;

    (i)  the Purchaser has such knowledge and experience in financial and
         business matters as is required in order to assess and evaluate the
         merits and risks of its purchase of the Purchased Shares;

    (j)  the Purchased Shares cannot readily be sold or disposed of, since
         there will be no public market, and it may not be possible to sell or
         dispose of the Purchased Shares at all.  The Purchaser represents that
         it:


                                          16

<PAGE>


         (i)  has liquid assets sufficient to ensure that its holding of the
              Purchased Shares will cause no undue financial difficulties to
              it;

        (ii)  can afford the complete loss of its investment in the Purchased
              Shares; and

       (iii)  can provide for its current needs and possible contingencies
              without the need to sell or dispose of the Purchased Shares;

    (k)  the Purchaser is acquiring the Purchased Shares as principal, for its
         own account and not on behalf of others, and for purposes of
         investment only and not with a view to resale or distribution of all
         or any part thereof;

    (l)  the Purchaser has not been formed solely or primarily for the purpose
         of purchasing the Purchased Shares (or any other securities) pursuant
         to exemptions from the registration and prospectus requirements
         contained in the B.C. Act (or in any other applicable securities
         legislation);

    (m)  the Purchaser has been afforded with full access to all relevant
         financial, technical, operational and corporate information relating
         to the Company, the Assets and the Purchased Shares, has been afforded
         an opportunity to ask such questions of the Company's officers,
         employees, agents, accountants and representatives concerning the
         foregoing and all other relevant matters as it has deemed necessary or
         desirable, has been given all such information that has been requested
         in order to assess and evaluate the Purchased Shares and the merits
         and the risks of the transactions contemplated herein, and, as a
         result, has acquired sufficient information concerning the Company to
         make an informed and knowledgeable decision with respect to the
         purchase of the Purchased Shares;


                                          17

<PAGE>


    (n)  the business plans and executive summaries of the Company dated
         December, 1995 and May, 1996 were prepared by its management for
         internal purposes only, and not with a view to creating any legal
         rights or obligations, and that in deciding to purchase the Purchased
         Shares the Purchaser has not relied upon such documents or upon any
         other representations or warranties made by or on behalf of the
         Company or the Vendor, other than those representations and warranties
         of the Company expressly set forth in this Agreement;

    (o)  the Purchaser has not received, nor has it requested, nor does it have
         any need to receive, any offering memorandum or other document (other
         than the Financial Statements) describing the business and affairs of
         the Company which has been prepared for delivery to, and review by,
         prospective purchasers in order to assist it in making an investment
         decision in respect of the Purchased Shares;

    (p)  the Purchaser has not been induced to enter into this Agreement or to
         purchase the Purchased Shares by any advertisement by or in radio,
         television or printed media of general and regular paid circulation;

    (q)  the Purchaser has been independently advised as to restrictions with
         respect to trading in the Purchased Shares imposed by the B.C. Act and
         the 1933 Act, confirms that no representation has been made to it by
         or on behalf of the Company with respect thereto, and acknowledges
         that it is aware of the characteristics of the Purchased Shares, the
         risks relating to an investment therein and the fact that it will not
         be able to resell the Purchased Shares except in accordance with
         limited exemptions under applicable securities legislation and
         regulatory policy; and

    (r)  the certificate representing the Purchased Shares to be delivered to
         the Purchaser pursuant to section 8.1(c) will contain a legend
         providing notice of the restrictions contained in the


                                          18

<PAGE>


         Shareholders Agreement and the resale restrictions applicable thereto
         under the B.C. Act, the 1933 Act and any other applicable securities
         law, and that the Purchaser will not sell or dispose of all or any
         part of the Purchased Shares except in accordance with such
         restrictions.

4.       SURVIVAL AND RELIANCE

4.1      SURVIVAL.  The representations and warranties contained in this
Agreement shall survive the Closing, the payment of the Purchase Price and the
transfer of the Purchased Shares.

4.2      RELIANCE.  Each of the Parties acknowledges and agrees that the other
Party has entered into this Agreement relying on the warranties and
representations and other terms and conditions of this Agreement,
notwithstanding any independent searches, enquiries or other investigations
undertaken by or on behalf of such other Party.

5.       COVENANTS

5.1      COVENANTS OF THE VENDOR.  The Vendor covenants and agrees to and with
the Purchaser that the Vendor will:

    (a)  prior to the Closing, fulfil any and all requirements (including,
         without limitation, compliance with the B.C. Act) required to be
         fulfilled by the Vendor to enable the Purchased Shares to be sold to
         the Purchaser in accordance with the terms of this Agreement;

    (b)  on or before the Closing Date, at its expense, execute and deliver, or
         cause to be delivered, each of the documents referred to in
         section 8.1 hereof;

    (c)  at all reasonable times prior to the Closing Date, and upon reasonable
         notice being provided by the Purchaser, cause the Company to (i)
         permit representatives of the Purchaser full access to the business
         premises of the Company and its books


                                          19

<PAGE>


         and records, including contracts and agreements, minute books and
         registers of members; (ii) give the Purchaser and its representatives
         such information with respect thereto as may be reasonably requested;
         and (iii) to permit the Purchaser to make such audit of the books of
         account of the Company and physical verification of the Assets as the
         Purchaser may see fit.  The cost of any such audit and verification
         will be for the account of the Purchaser.  The Vendor will cause its
         financial officers and those of the Company to discuss and answer
         fully any and all questions of the Purchaser relating to the Assets or
         the business and affairs of the Company;

    (d)  use all commercially reasonable efforts to assist the Purchaser, at
         its cost, in obtaining from all appropriate federal, provincial,
         state, municipal and other governmental or administrative bodies and
         all other Persons, such approvals and consents as are necessary in
         order to permit the sale of the Purchased Shares to the Purchaser as
         contemplated herein; and

    (e)  from the date of this Agreement to the Closing Date, cause the Company
         to:

         (i)  carry on its business in the ordinary and normal course, in a
              prudent, businesslike and efficient manner, and substantially in
              accordance with the procedures and practices in effect on the
              date hereof;

        (ii)  use its best efforts to preserve and maintain the existing
              licences, franchises, rights and privileges pertinent to the
              business and operations of the Company and the goodwill of its
              business and to preserve intact its business organization and
              relationship with its employees; and

       (iii)  do all necessary repairs and maintenance to its material assets
              and take reasonable care to protect and safeguard those assets;
              and



                                          20

<PAGE>


    (f)  not enter into any agreement, commitment, or arrangement, or undertake
         or omit to take any other action, which would preclude the Vendor from
         completing the transactions contemplated hereby on the terms set out
         in this Agreement.

5.2      COVENANTS OF THE PURCHASER.  The Purchaser covenants to and with the
Vendor that the Purchaser will:

    (a)  on or before the Closing Date, at its expense, execute and deliver, or
         cause to be delivered, each of the documents referred to in
         section 8.2 hereof;

    (b)  use all commercially reasonable efforts to obtain any and all
         approvals referred to in section 5.1(d);

    (c)  comply with any and all applicable requirements of the INVESTMENT
         CANADA ACT with respect to its purchase of the Purchased Shares;

    (d)  if required by the B.C. Act, the 1933 Act or any other applicable
         securities laws, execute, deliver, file and otherwise assist the
         Vendor in filing, such reports, undertakings and other documents as
         are required thereunder with respect to the sale of the Purchased
         Shares;

    (e)  use its best efforts to complete the Share Purchase by September 30,
         1996;

    (f)  if the Share Purchase does not complete in accordance with the terms
         of this Agreement, forthwith return to the Vendor all data, documents,
         information and other material provided by the Vendor to the Purchaser
         in respect of the Assets or the Company, including, without
         limitation, any copies of the same made by the Purchaser or its
         employees, agents or advisors; and


                                          21

<PAGE>


    (g)  if the Share Purchase does not complete in accordance with the terms
         of this Agreement, other than as a result of a breach of this
         Agreement or the Subscription Agreement by the Vendor or the Company,
         respectively, pay all reasonable legal fees incurred by the Vendor in
         connection with the transactions contemplated herein.

6.       FINANCING OF THE COMPANY PRIOR TO CLOSING

6.1      FINANCING OF THE COMPANY.  The Parties acknowledge and agree that the
Vendor has financed and will, until the Closing, continue to finance, the
business and operations of the Company.

6.2      CONVERSION OF PAST FINANCING.  Any and all financing provided by the
Vendor on or before August 31, 1996 has been converted into or exchanged for, or
will be converted into or exchanged for, Common shares of the Company, which
will comprise part of the Vendor's Shares.

6.3      FUTURE FINANCING.  Any and all financing provided by the Vendor to the
Company, and any and all obligations of the Company incurred or paid by the
Vendor, in either case in respect of the period from and after August 31, 1996
and to and including the Closing Date, shall be evidenced by one or more demand
promissory notes issued by the Company to the Vendor (copies of which will be
provided to the Purchaser), shall bear interest at the prime rate of interest
announced from time to time by Royal Bank of Canada plus 2% per annum, and shall
be paid by the Company to the Vendor at Closing.  If any such amount is not
determinable at Closing, such amount, together with interest at the aforesaid
rate, will be paid by the Company to the Vendor within 30 days after the Company
receives satisfactory evidence thereof.

7.       CONDITIONS PRECEDENT

7.1      IN FAVOUR OF THE PURCHASER.  Notwithstanding anything herein
contained, the obligation of the Purchaser to carry out the terms of this
Agreement and to complete the purchase of the Purchased Shares is subject to


                                          22

<PAGE>


the fulfillment, on or before the Closing Date, of each of the following
conditions:

    (a)  the Purchaser shall have approved the form and substance of the
         Shareholders Agreement and the Letter Agreement;

    (b)  the Company and the Purchaser shall have completed the Share
         Subscription concurrently herewith;

    (c)  the Purchaser shall have obtained any and all approvals referred to in
         section 5.1(d);

    (d)  the Company shall have entered into an employment agreement with each
         of Branko Palcic, Dave Garner and Alan Harrison, in form and substance
         satisfactory to each of the Parties;

    (e)  each of the warranties and representations of the Vendor shall be true
         and correct as of the date hereof and as of the Closing Date;

    (f)  the Vendor shall have complied with all of the covenants and
         agreements required to be performed or complied with by it hereunder;

    (g)  the Purchaser shall have completed its review of the IP Assets and
         shall be reasonably satisfied that the representations and warranties
         of the Vendor contained in this Agreement relating to such assets are
         accurate in all material respects; and

    (h)  the Purchaser shall have consummated the underwritten public offering
         of its common stock (the "Underwritten Offering"), as contemplated in
         the Registration Statement on Form S-2 (Regis. No. 333-09011) as filed
         with the Securities and Exchange Commission, as may be amended.


                                          23

<PAGE>


         The conditions set forth in section 7.1 are for the exclusive benefit
of the Purchaser and may be waived by the Purchaser in whole or in part on or
before the Closing Date.

7.2      IN FAVOUR OF THE VENDOR.  Notwithstanding anything herein contained,
the obligation of the Vendor to carry out the terms of this Agreement and to
complete the sale of the Purchased Shares is subject to the fulfillment, on or
before the Closing Date, of each of the following conditions:

    (a)  each of the Vendor and the Company shall have approved the form and
         substance of the Shareholders Agreement and the Letter Agreement;

    (b)  the Company and the Purchaser shall have completed the Share
         Subscription concurrently herewith;

    (c)  the Purchaser shall have obtained any and all approvals referred to in
         section 5.1(d);

    (d)  the Company shall have entered into an employment agreement with each
         of Branko Palcic, Dave Garner and Alan Harrison, in form and substance
         satisfactory to each of the Parties;

    (e)  each of the warranties and representations of the Purchaser shall be
         true and correct as of the date hereof and as of the Closing Date; and

    (f)  the Purchaser shall have complied with all of the covenants and
         agreements required to be performed or complied with by it hereunder.

         The conditions set forth in section 7.2 are for the exclusive benefit
of the Vendor and may be waived by the Vendor in whole or in part on or before
the Closing Date.


                                          24

<PAGE>


8.       CLOSING DELIVERIES

8.1      BY THE VENDOR.  At the Closing, the Vendor shall deliver or cause to
be delivered to the Purchaser:

    (a)  a certified copy of a resolution of the directors of the Company,
         certified by its Secretary, approving the transfer of the Purchased
         Shares from the Vendor to the Purchaser;

    (b)  a certified copy of resolutions of the directors of the Vendor,
         certified by its Secretary, authorizing or ratifying the execution and
         delivery of this Agreement, the Shareholders Agreement and each of the
         other agreements and instruments contemplated hereby;

    (c)  a share certificate representing the Purchased Shares, registered in
         the name of the Purchaser;

    (d)  a certificate of good standing for the Company issued by the Registrar
         of Companies for the Province of British Columbia as of a date not
         more than 5 days prior to the Closing Date;

    (e)  a copy of the Vendor's cheque payable to 1991 Capital West Partners in
         full payment of its fees and expenses in connection with the Share
         Purchase;

    (f)  evidence of the financing provided by the Vendor to the Company and
         the obligations of the Company incurred or paid by the Vendor which
         the Company is required to pay to the Vendor at Closing pursuant to
         section 6.3;

    (g)  an opinion from the solicitors for the Vendor with respect to the sale
         of the Purchased Shares, the corporate power and capacity of the
         Vendor, the due authorization, execution and delivery of this
         Agreement and the Shareholders Agreement by the Vendor,


                                          25

<PAGE>


         and the good standing of the Company, in form and substance
         satisfactory to the Purchaser, acting reasonably; and

    (h)  a certificate executed by the Vendor dated the Closing Date to the
         effect that the representations and warranties of the Vendor contained
         in this Agreement are true and correct as of the Closing Date and that
         the Vendor has performed all of the agreements, covenants and
         obligations contained herein to be performed by it on or before the
         Closing Date.

8.2      BY THE PURCHASER.  At the Closing, the Purchaser shall deliver or
cause to be delivered to the Vendor:

    (a)  the certified cheque or bank draft referred to in section 2.2;

    (b)  the Shareholders Agreement, in form and substance satisfactory to both
         Parties, executed by the Purchaser;

    (c)  the Letter Agreement, in form and substance satisfactory to both
         Parties, executed by the Purchaser;

    (d)  the Company's cheque in full payment of all amounts owing to the
         Vendor and required to be paid at Closing pursuant to section 6.3;

    (e)  an opinion from the solicitors for the Purchaser with respect to the
         corporate power and capacity of the Purchaser and the due
         authorization, execution and delivery by the Purchaser of this
         Agreement and the Shareholders Agreement, in form and substance
         satisfactory to the Vendor, acting reasonably; and

    (f)  a certificate, executed by the Purchaser and dated the Closing Date,
         to the effect that the representations and warranties of the Purchaser
         contained in this Agreement are true and correct in all material
         respects as of the Closing Date and that the Purchaser has performed
         all agreements, obligations and covenants


                                          26

<PAGE>


         required hereunder to be performed by it on or before the Closing
         Date.

9.       CLOSING AND TERMINATION

9.1      TIME AND PLACE OF CLOSING.  The completion of the purchase and sale of
the Purchased Shares as contemplated by this Agreement (the "Closing") shall
take place at 10:00 a.m. (Vancouver time) on a date (the "Closing Date") to be
mutually agreed upon by the Purchaser and the Vendor, in writing, which shall be
on or prior to five business days following the date on which the Underwritten
Offering is consummated, but which shall not, in any event, be later than
October 15, 1996.  The Closing shall take place at the registered offices of the
Company in Richmond, Canada, or at such other place as the parties may agree
upon in writing. The Purchaser shall keep the Vendor informed of the anticipated
date of consummation of the Underwritten Offering.

9.2      CLOSING PROCEDURES.  All documents to be delivered at the Closing will
be delivered to the solicitors for the Vendor, in escrow, on or before the
Closing Date.  All matters of payment, execution and delivery of documents
required to be paid and/or delivered at Closing will be deemed to be concurrent
requirements, and the Closing shall not occur until all such payments and
documents have been paid, executed and/or delivered, as the case may be.

9.3      TERMINATION.  If the Closing has not occurred on or before October 15,
1996, either Party may terminate this Agreement by giving written notice of such
termination to the other Party, in which case this Agreement shall immediately
terminate, provided that:

    (a)  subject to section 9.3(b), the terminating Party is not in material
         breach of any of its obligations, agreements, covenants,
         representations or warranties pursuant to this Agreement;

    (b)  if each of the Parties is in material breach of any of its
         obligations, agreements, covenants, representations or


                                          27

<PAGE>


         warranties pursuant to this Agreement, section 9.3(a) shall not apply;
         and

    (c)  such termination shall not relieve either Party from liability for its
         material breach of any of the terms or provisions of this Agreement.

10.      INDEMNIFICATION

10.1     BY THE VENDOR.  The Vendor will, upon demand, indemnify, defend and
hold harmless the Purchaser from and against any and all demands, claims,
actions, proceedings, losses, damages, liabilities, costs and expenses suffered
or incurred by the Purchaser, directly or indirectly, by reason of a breach of
or any inaccuracy in any of the representations or warranties contained in
section 3.1 hereof or a breach of any of the covenants contained in section 5.1
hereof.

10.2     BY THE PURCHASER.  The Purchaser will, upon demand, indemnify, defend
and hold harmless the Vendor from and against any and all demands, claims,
actions, proceedings, losses, damages, liabilities, costs and expenses suffered
or incurred by the Vendor, directly or indirectly, by reason of a breach of or
any inaccuracy in any of the representations or warranties contained in
section 3.2 hereof or a breach of any of the covenants contained in section 5.2
hereof.

10.3     LIMITATION.  Notwithstanding the provisions of sections 10.1 and 10.2,
and notwithstanding any inaccuracy or incorrectness of any provision in this
Agreement, no claim for indemnification, damages or other relief will be valid
against either Party unless such claim is made within a period of 12 months of
the Closing Date and any claim not made within such time will thereafter be
barred.

10.4     MONETARY LIMITATION.  Neither Party will make any claim for indemnity
hereunder unless the claim, or the total of all claims, by such Party exceeds
$500,000, in which event the indemnity contained herein will include all amounts
up to and in excess of $500,000.


                                          28

<PAGE>


10.5     NOTIFICATION AND CONDUCT OF CLAIM.  If a claim, other than a claim for
fraud, is made against either Party (the "Indemnifier"), as a result of which
the other Party (the "Other") wishes to assert a claim against the Indemnifier
under section 10.1 or 10.2, as the case may be, the Other will, as soon as
practicable, notify the Indemnifier thereof.  In such event, the Indemnifier
may, in its sole discretion, either take conduct of or assist in any matter or
proceeding involving third parties in order to contest and/or settle such claim.
The Other will not take any step or proceeding to waive or extend any applicable
limitation period.  If the Indemnifier takes conduct of such matter or
proceeding, the Indemnifier may, and the Other hereby authorizes the Indemnifier
to, make such investigations, negotiations and settlements as it deems
expedient.  No settlement shall be entered into without the written consent of
both Parties, which shall not be unreasonably withheld.  All expenses incurred
in connection with such contest or settlement will be paid by the Indemnifier if
the Other prevails.

11.      DISPUTE RESOLUTION

11.1     ATTORNMENT.  Each Party hereby irrevocably attorns to the jurisdiction
of the courts of the Province of British Columbia, agrees that such courts shall
have IN PERSONAM jurisdiction over it, consents to service of process in any
manner authorized by British Columbia law, and agrees that, subject to section
11.2, any action, suit or proceeding with respect to any disputes, differences
or controversies arising out of, in relation to or in connection with this
Agreement, or any breach hereof, shall be brought in the courts of the Province
of British Columbia.  Each Party further agrees that a final judgment in any
such action or suit shall be conclusive and may be enforced in any other
jurisdiction by suit or action on the judgment or in any other manner specified
by law.

11.2     ARBITRATION.  Any difference, controversy or dispute arising out of or
in connection with this Agreement, including, without limiting the generality of
the foregoing, any question regarding its existence, validity or termination,
shall be referred to and finally resolved by arbitration administered by the
British Columbia International Commercial Arbitration


                                          29

<PAGE>


Centre pursuant to its Rules. The place of the arbitration shall be Vancouver,
Canada.

12.      NOTICES

12.1     NOTICES.  All notices given pursuant to this Agreement shall be in
writing and shall be made by hand delivery, first class mail (registered or
certified, return receipt requested), telex, telecopier, or overnight air
courier guaranteeing next day delivery to the relevant address specified below.
Except as otherwise provided in this Agreement, each such notice shall be deemed
given: at the time delivered by hand, if personally delivered or mailed postage
prepaid; when answered back, if telexed; when receipt is acknowledged, if
telecopied; and the next business day after timely delivery to the courier, if
sent by overnight air courier guaranteeing next day delivery.

         If to the Purchaser, to:

         AccuMed International, Inc.
         900 North Franklin Street, Suite 401
         Chicago, Illinois   60610

         Attention:  Peter P. Gombrich, Chief Executive Officer

         Telecopy No.:       312-642-6884
         Confirmation No.:   312-642-9200

         with a copy to:

         Graham & James LLP
         400 Capitol Mall, Suite 2400
         Sacramento, California  95814

         Attention:  Kevin A. Coyle, Esq.

         Telecopy No.:       916-441-6700
         Confirmation No.:   916-558-6700

         If to the Vendor to:

         Xillix Technologies Corp.
         300 - 13775 Commerce Parkway


                                          30

<PAGE>


         Richmond, B.C.
         V6V 2V4

         Attention:  President

         Telecopy No.:       604-278-5111
         Confirmation No.:   604-278-5000

         with a copy to:

         Fraser & Beatty
         1500 - 1040 West Georgia Street
         Vancouver, B.C.
         V6E 4H8

         Attention:     Gary R. Sollis

         Telecopy No.:       604-683-5214
         Confirmation No.:   604-687-4460

13.      GENERAL

13.1     TIME OF ESSENCE.  Time shall be of the essence of this Agreement.

13.2     FURTHER ASSURANCES.  Each of the Parties shall, at the request and
expense of the other, both before and after the Closing, do any and all such
further acts and things and execute and deliver any and all such further
documents and instruments as are necessary or desirable to carry out the intent
of this Agreement.

13.3     WHOLE AGREEMENT.  This Agreement contains the whole agreement between
the Vendor and the Purchaser in respect of the purchase and sale of the
Purchased Shares and supersedes all prior correspondence, agreements and
understandings, oral or written, by or between the Parties with respect thereto,
including, without limitation, the Letter of Intent dated July 3, 1996 among the
Vendor, the Company and the Purchaser and the business plans and executive
summaries (except only the operating budget contained in the May, 1996 business
plan) of the Company dated December, 1995 and May, 1996.  There are no
warranties, representations, terms,


                                          31

<PAGE>


conditions or collateral agreements, express, implied or otherwise, relating to
the subject matter hereof, other than as expressly set forth in this Agreement.

13.4      AMENDMENTS AND WAIVERS.  No amendment, waiver or termination of this
Agreement shall be binding unless executed in writing by the Party to be bound
thereby.  No waiver of any provision of this Agreement shall be deemed or shall
constitute a waiver of any other provision, nor shall any such wavier constitute
a continuing waiver, unless otherwise expressly provided.

13.5      ASSIGNMENT.  This Agreement may not be assigned by either Party
without the prior written consent of the other Party, which consent may be
arbitrarily withheld.

13.6      CONFIDENTIALITY.  Neither of the Parties will disclose the existence
or any of the terms or conditions of this Agreement to any Person who is not a
director, officer, employee or bona fide authorized representative (which is
deemed to include professional advisors) of such Party, without the prior
written consent of the other Party, which consent shall not be unreasonably
withheld, except:

    (a)  if such disclosure is required by law, including, without limitation,
         the disclosure requirements of the regulations promulgated under the
         B.C. Act and the 1933 Act; or

    (b)  if such disclosure is in the normal course of such Party's business
         and such disclosure is made on a "need-to-know" and confidential
         basis,

and, if time permits, each Party shall, prior to issuing any press release or
making any other public announcement concerning the transactions contemplated
hereby, provide a copy of the text of such release or announcement to the other
Party for its review and comments.


                                          32

<PAGE>


13.7      ENUREMENT.  This Agreement shall be binding upon and shall enure to
the benefit of the Parties and their respective successors and permitted
assigns.

13.8      COUNTERPARTS.  This Agreement may be executed in one or more
counterparts and such counterparts may be transmitted by electronic facsimile,
and each such counterpart shall be deemed to be an original and together such
counterparts shall constitute one document.

         IN WITNESS WHEREOF the Parties have duly executed this Agreement as of
the day and year first above written.


                             XILLIX TECHNOLOGIES CORP.


                             By: /s/ Pierre Leduc
                                --------------------------------
                                  Authorized Signatory

                             By:________________________________
                                  Authorized Signatory


                             ACCUMED INTERNATIONAL, INC.


                             By: /s/ Peter P. Gombrich
                                --------------------------------
                                 Peter P. Gombrich,
                                 Chief Executive Officer


                                          33


<PAGE>

                                SUBSCRIPTION AGREEMENT

         THIS AGREEMENT made as of the 16th day of August, 1996.

BETWEEN:

         ONCOMETRICS IMAGING CORP., a corporation duly incorporated and
existing under the laws of the Province of British Columbia, having its
registered office at 300 - 13775 Commerce Parkway, Richmond, British Columbia,
Canada, V6V 2V4

         ("Oncometrics")

AND:

         ACCUMED INTERNATIONAL, INC., a corporation duly incorporated
         and existing under the laws of the State of Delaware, United
         States of America, having its principal office at 900 N.
         Franklin, Suite 401, Chicago, Illinois, U.S.A., 60610

         ("AccuMed")

WHEREAS:

A.       Oncometrics is a wholly-owned subsidiary of Xillix Technologies Corp.
("Xillix"), which is a British Columbia publicly traded company;

B.       Oncometrics was formed in 1995 for the purpose of acquiring from
Xillix, and completing the development of, a proprietary technology for the
screening of high risk individuals for cancer, which is more particularly
described in Schedule "A" hereto (the "Technology");

C.       Oncometrics has acquired and now owns or holds rights to the
Technology and certain related patents, patent applications, trademarks,
inventories, equipment and other assets, all of which are more particularly
described in Schedule "B" hereto (collectively, the "Assets");

D.       AccuMed has agreed to acquire a two-thirds equity interest in
Oncometrics, by purchasing 1,000,000 Common shares of Oncometrics from Xillix


<PAGE>

(the "Share Purchase") and by subscribing for and purchasing 1,000,000 Common
shares from Oncometrics (the "Share Subscription"), and Xillix and Oncometrics
have agreed to issue and/or sell such shares;

E.       AccuMed, Oncometrics and Xillix have agreed that, upon the completion
of the Share Subscription, they will enter into a shareholders' agreement
defining their respective rights and obligations relating to Oncometrics (the
"Shareholders Agreement");

F.       AccuMed and Oncometrics have agreed that, simultaneous with the
completion of the Share Subscription, they will enter into a letter agreement
setting forth the terms and conditions upon which AccuMed will provide certain
manufacturing, marketing and quality control services to Oncometrics in respect
of all of the development of all of its gynecological and sputum products (the
"Letter Agreement"); and

G.       The Parties have agreed that the completion of the Share Subscription,
on the terms and conditions set out in this Agreement, shall be conditional upon
and shall occur concurrently with the completion of the Share Purchase and the
execution of the Shareholders Agreement and the Letter Agreement.

         NOW THEREFORE THIS AGREEMENT WITNESSETH that in consideration of the
premises and the covenants, warranties and agreements hereinafter set forth (the
receipt and sufficiency of which is hereby acknowledged), the Parties hereby
agree as follows:

1.       INTERPRETATION

1.1      DEFINITIONS.  In this Agreement, unless the context otherwise
requires, the following terms shall have the respective meanings set out below:

    (a)  "ARM'S LENGTH", "NON-ARM'S LENGTH" and similar expressions have the
         meanings ascribed to them in the INCOME TAX ACT of Canada, as
         presently in force;

    (b)  "ASSETS" has the meaning ascribed thereto in Recital C;


                                          2

<PAGE>


    (c)  "B.C. ACT" means the SECURITIES ACT of British Columbia, as amended,
         together with all regulations, rules and policies from time to time
         thereunder;

    (d)  "CLOSING" has the meaning ascribed thereto in section 9.1;

    (e)  "CLOSING DATE" has the meaning ascribed thereto in section 9.1;

    (f)  "FINANCIAL STATEMENTS" has the meaning ascribed thereto in
         section 3.1(j);

    (g)  "INDEMNIFIER" has the meaning ascribed thereto in section 10.5;

    (h)  "IP ASSETS" has the meaning ascribed thereto in section 3.1(x);

    (i)  "LETTER AGREEMENT" has the meaning ascribed thereto in Recital F;

    (j)  "MATERIAL CONTRACTS" means all contracts and agreements to which
         Oncometrics is a party or by which it is bound and which are material
         to the Assets or the business and operations of Oncometrics, but, for
         greater certainty, do not include any contracts or agreements:

         (i)  which may be terminated by Oncometrics, without the payment of
              any penalty or compensation, on not more than one month's notice;
              and

        (ii)  which have been entered into in the ordinary course of business
              of Oncometrics and which do not involve the expenditure of more
              than $10,000;

    (k)  "1933 ACT" means the SECURITIES ACT OF 1933 of the United States, as
         amended, together with all regulations, rules and policies from time
         to time thereunder;

    (l)  "OTHER" has the meaning ascribed thereto in section 10.5;


                                          3

<PAGE>


    (m)  "PARTIES" means Oncometrics and AccuMed, and "PARTY" means either one
         of them;

    (n)  "PERSON" means any individual, partnership, limited liability
         partnership, corporation, limited liability corporation, joint stock
         company, trust, unincorporated association, government, government
         agency, or other entity;

    (o)  "SHARE PURCHASE" has the meaning ascribed thereto in Recital D;

    (p)  "SHARE PURCHASE AGREEMENT" has the meaning ascribed thereto in section
         3.1(u);

    (q)  "SHARE SUBSCRIPTION" has the meaning ascribed thereto in Recital D;

    (r)  "SHAREHOLDERS AGREEMENT" has the meaning ascribed thereto in
         Recital E;

    (s)  "STATEMENT DATE" means May 31, 1996, being the end of the period
         covered by the Financial Statements;

    (t)  "SUBSCRIBED SHARES" has the meaning ascribed thereto in section 2.1;

    (u)  "SUBSCRIPTION PRICE" has the meaning ascribed thereto in section 2.1;

    (v)  "TECHNOLOGY" has the meaning ascribed thereto in Recital B;

    (w)  "UNDERWRITTEN OFFERING" has the meaning ascribed thereto in
         section 7.1(h);

    (x)  "XILLIX" has the meaning ascribed thereto in Recital A; and

    (y)  "XILLIX SHARES" has the meaning ascribed thereto in section 3.1(e).


                                          4

<PAGE>


1.2      DIVISIONS AND HEADINGS.  The division of this Agreement into sections
and the insertion of headings are for convenience of reference only and shall
not affect the construction or interpretation hereof.  All references in this
Agreement to a designated section or other subdivision is to the designated
section or other subdivision of this Agreement.

1.3      GENDER AND NUMBER.  Unless the context otherwise requires, words
importing the singular include the plural and vice versa and words importing
gender include all genders.

1.4      GOVERNING LAW.  This Agreement shall in all respects be governed by
and construed in accordance with the laws of the Province of British Columbia
and the laws of Canada applicable therein.

1.5      INVALIDITY.  The invalidity or unenforceability of any provision of
this Agreement shall not affect the validity or enforceability of any other
provision hereof and any such invalid or unenforceable provision shall be deemed
to be severable.

1.6      CURRENCY.  Unless otherwise indicated herein, all dollar amounts
referred to in this Agreement are expressed, and shall be paid, in lawful
currency of the United States of America.

1.7      ACCOUNTING TERMINOLOGY.  All accounting terms used but not defined in
this Agreement shall have the respective meanings ascribed thereto in accordance
with generally accepted accounting principles in Canada, as established and
applied from time to time by the Canadian Institute of Chartered Accountants.

1.8      DESCRIPTION OF SCHEDULES.  The following are the schedules to this
Agreement, which form an integral part hereof:

         Schedule "A"   -    Description of Technology
         Schedule "B"   -    Description of Assets
         Schedule "C"   -    Employee Matters
         Schedule "D"   -    Financial Statements
         Schedule "E"   -    Material Contracts.


                                          5

<PAGE>


2.       SUBSCRIPTION FOR SHARES OF ONCOMETRICS

2.1      SUBSCRIPTION AND ISSUE.  On the basis of the representations and
warranties contained herein, AccuMed hereby subscribes for and agrees to take
up, and Oncometrics hereby agrees to issue and sell, 1,000,000 Common shares
without par value in the capital of Oncometrics (the "Subscribed Shares"), at
the Closing, at a price of Two ($2.00) Dollars per share, for an aggregate
subscription price of Two Million ($2,000,000) Dollars (the "Subscription
Price"), on the terms and conditions set forth herein.

2.2      PAYMENT OF PURCHASE PRICE.  AccuMed will pay the Subscription Price to
Oncometrics by certified cheque or bank draft payable to Oncometrics at par in
Vancouver, Canada on the Closing Date.

2.3      USE OF PROCEEDS.  The Subscription Price shall be used by Oncometrics:

    (a)  to pay the fees and expenses payable to 1991 Capital West Partners in
         connection with the Share Subscription;

    (b)  to pay to Xillix all amounts owing to it and referred to in section
         6.3; and

    (c)  for the purposes described in the operating budget contained in the
         business plan of Oncometrics dated May, 1996.

3.       REPRESENTATIONS AND WARRANTIES

3.1      REPRESENTATIONS OF ONCOMETRICS.  Oncometrics hereby represents and
warrants to AccuMed as follows:

    (a)  Oncometrics is a company duly incorporated, organized and validly
         existing and in good standing under the laws of the Province of
         British Columbia, Canada and is duly qualified to carry on business as
         a foreign corporation in each other jurisdiction where the failure to
         so qualify


                                          6

<PAGE>

         would have a material adverse effect on the business, financial
         condition or assets of Oncometrics;

    (b)  Oncometrics has all necessary corporate power, authority and right to
         own, lease and hold the properties and assets owned, leased or held by
         it (including, without limitation, the Assets), to conduct its
         business as presently conducted and as proposed to be conducted, to
         enter into this Agreement, the Shareholders Agreement and the Letter
         Agreement and to perform and observe its respective obligations and
         agreements herein and therein contained;

    (c)  Oncometrics has taken all actions necessary to authorize and enter
         into and perform its obligations under this Agreement and this
         Agreement has been duly executed and delivered by Oncometrics and is a
         valid and binding obligation of Oncometrics enforceable in accordance
         with its terms, except as may be limited by laws of general
         application affecting the rights of creditors and principles of
         equity;

    (d)  Oncometrics will, prior to Closing, have taken all actions necessary
         to authorize and enter into and perform its obligations under the
         Shareholders Agreement and the Letter Agreement, and each of such
         agreements will, when duly executed and delivered by Oncometrics, be a
         valid and binding obligation of Oncometrics enforceable in accordance
         with its respective terms, except as may be limited by laws of general
         application affecting the rights of creditors and principles of
         equity;

    (e)  the entire authorized capital of Oncometrics consists of 50,000,000
         Common shares without par value, of which:

         (i)  prior to the completion of the Share Subscription, on the Closing
              Date, 2,000,000 Common shares will be outstanding and held of
              record and beneficially owned by Xillix (the "Xillix Shares");
              and

        (ii)  after completion of the Share Subscription, 3,000,000 Common
              shares will be outstanding;


                                          7

<PAGE>


    (f)  there are no outstanding options, warrants, rights to subscribe, calls
         or commitments relating to, or securities or rights convertible into,
         shares in the capital of Oncometrics, or contracts, commitments or
         arrangements obligating Oncometrics to issue additional shares in its
         capital or warrants or rights to purchase or acquire any shares in its
         capital, other than this Agreement;

    (g)  the Subscribed Shares will, when issued in accordance with the terms
         of this Agreement, be duly authorized and validly issued and
         outstanding as fully paid and non-assessable Common shares of
         Oncometrics, free and clear of all liens, charges and encumbrances;

    (h)  no person, other than AccuMed under the terms of this Agreement, has
         any agreement or option, or any right capable of becoming an agreement
         or option, for the purchase, subscription or issuance of any unissued
         shares or other securities of Oncometrics, and the Subscribed Shares,
         when issued, will be issued without violating the preemptive rights of
         any shareholder;

    (i)  Oncometrics is conducting its business in material compliance with all
         applicable laws, rules and regulations of each jurisdiction in which
         its business is carried on and is duly licensed, registered or
         qualified in all jurisdictions in which it owns, holds, leases or
         operates its property or carries on business to enable its business to
         be carried on as now conducted and its property and assets to be
         owned, held, leased and operated, and all such licenses, registrations
         and qualifications are valid and subsisting and in good standing,
         except in respect of matters which do not and will not result in any
         material adverse change to the business, business prospects or
         condition (financial or otherwise) of Oncometrics;

    (j)  the audited financial statements of Oncometrics for the period ended
         May 31, 1996, a copy of which are attached as Schedule "D" hereto (the
         "Financial Statements"), present fairly, in all material respects, the
         financial position and results of the operations of Oncometrics for
         the


                                          8

<PAGE>


         period then ended, and have been prepared by the management of
         Oncometrics in accordance with Canadian generally accepted accounting
         principles, applied on a consistent basis;

    (k)  to the best of its knowledge, there are no liabilities, absolute,
         contingent or otherwise, of Oncometrics which are not disclosed or
         reflected in the Financial Statements or in this Agreement, except:

         (i)  those incurred in the ordinary course of its business since the
              Statement Date;

        (ii)  those which are covered by existing insurance policies or are for
              amounts not greater than policy deductibles; and

       (iii)  the contingent liabilities arising pursuant to or in connection
              with the Material Contracts referred to in Schedule "E" hereto;
              and

        (iv)  any future loss by Xillix relating to the collection of the final
              payment of $50,000 on the sale of a Cyto-Savant system to the
              University of Rochester pursuant to the agreement referred to in
              paragraph 5 of Part A of Schedule "E";

    (l)  Oncometrics has not guaranteed, or agreed to guarantee, any debt,
         liability or other obligation of any Person, other than the debt
         referred to in section 3.1(k)(iv);

    (m)  all material transactions of Oncometrics have been properly recorded
         or filed in or with its books and records and the minute book of
         Oncometrics contains all records of the meetings and proceedings of
         the shareholders and directors thereof;

    (n)  Oncometrics has not been required by law to file any tax returns or
         reports prior to the date hereof;


                                          9

<PAGE>


    (o)  there are no taxes payable for the current period for which tax
         returns are not yet required to be filed, there are no agreements,
         waivers or other arrangements providing for an extension of time with
         respect to the filing of any tax return by, or payment of, any tax,
         governmental charge or deficiency by Oncometrics;

    (p)  there are no proceedings or actions in progress, pending or threatened
         against Oncometrics for the assessment or the collection or remittance
         of taxes, charges, interests, penalties, instalments or other amounts
         and there are no material questions of taxation or assessment which
         are the subject of dispute with any taxing authority, or any grounds
         that could result in an assessment, reassessment, charge or
         potentially adverse determination by any taxation authority;

    (q)  since the Statement Date:

         (i)  no return of capital or other distribution of any kind on its
              shares has been declared or paid by Oncometrics;

        (ii)  no capital expenditure or commitment therefor has been made by
              Oncometrics in excess of $25,000;

       (iii)  Oncometrics has carried on its business in the ordinary and
              normal course, in a prudent, businesslike and efficient manner,
              and substantially in accordance with the procedures and practices
              in effect on the Statement Date;

        (iv)  there has been no material adverse change in the financial
              position or condition of Oncometrics and no damage, loss or
              destruction materially affecting the business or assets of
              Oncometrics or its right or capacity to carry on such business;
              and

         (v)  Oncometrics has not paid or agreed to pay any compensation,
              pension, bonus, share of profits or other benefit to, or for the
              benefit of, any employee, director or officer, except in the
              normal


                                          10

<PAGE>


              course of business and as disclosed or reflected in its books and
              records;

    (r)  Oncometrics has good and marketable title to, or a valid license or
         other right to use, all of the material assets referred to in Schedule
         "B", except inventory disposed of, and changes in the working capital
         item, since the Statement Date in the ordinary course of business,
         free and clear of all liens, charges or encumbrances;

    (s)  Schedule "E" hereto sets forth a complete and accurate list of all
         Material Contracts to which Oncometrics is a party or by which it is
         bound;

    (t)  no Person who is not at arm's length to Oncometrics is now indebted to
         it on any account whatsoever;

    (u)  Oncometrics is not indebted to any Person who is not at arm's length
         to it, except:

         (i)  as reflected in the Financial Statements;

        (ii)  for salaries or operating expenses accrued in the normal course
              of business; and

       (iii)  as expressly provided for or contemplated in this Agreement or
              the agreement between Xillix and AccuMed of even date herewith
              relating to the Share Purchase (the "Share Purchase Agreement");

    (v)  the amount of the indebtedness of Oncometrics to Western Economic
         Diversification Program as at July 31, 1996 was $307,726 (Canadian);

    (w)  Oncometrics maintains such insurance against loss or damage to its
         assets and with respect to public liability as is reasonably prudent
         for a corporation operating similar businesses to that of Oncometrics;


                                          11

<PAGE>


    (x)  set forth on Schedule "A" is a true and complete list of the
         Technology and set forth on Schedule "B" is a true and complete list
         of all the rights to the Technology and certain related patents,
         patent applications, trademarks, and copyrights or rights thereto
         owned or held by Oncometrics (collectively, the "IP Assets") which
         constitutes all of the intangible property relating to the Technology
         and which is presently owned, licensed, possessed, used or held by
         Oncometrics.  To the extent applicable, the list set forth in Schedule
         "B" specifies, among other things, the patent numbers and date of
         issue of each patent, the application number and date of application
         for each patent pending, the copyright registration numbers and date
         of grant, numbers and filing dates of all applications for copyright
         legislation, the numbers and dates of grants of all trademark
         registrations, the numbers and filing dates of all applications for
         trademark registrations.  Oncometrics owns sufficient interest in and
         to the Technology to enable it to conduct its business as presently
         conducted and proposed to be conducted.  To the best of Oncometrics'
         knowledge:

         (i)  no Person is infringing upon any of the IP Assets or has any
              claim which competes with the IP Assets;

        (ii)  all trade secrets relating to the Technology have been adequately
              safeguarded, have not been disclosed to any third parties who are
              not bound to maintain the confidentiality of such trade secrets;
              and

       (iii)  the conduct of Oncometrics' business, including without
              limitation use of the Technology, does not infringe any patent,
              copyright, trademark, trade secret, trade name, or commercial
              name, registered or unregistered, or other intellectual property
              rights of third parties, and no claim is pending or has been made
              to such effect;

    (y)  Oncometrics has 10 employees, particulars of which are set forth in
         Schedule "C", and is not a party to a collective agreement with any
         trade union;


                                          12

<PAGE>


    (z)  there are no pension, profit sharing, group insurance, deferred
         compensation or other similar plans affecting Oncometrics, other than
         the plans referred to in Schedule "C";

    (aa) Oncometrics does not hold, either directly or indirectly, a legal or
         beneficial interest in any real property, except by way of a lease of
         its office premises entered into in the normal course of business;

    (ab) no consent, approval or authorization of any third party or of any
         governmental authority is required to be obtained on the part of
         Oncometrics to permit the execution or delivery of this Agreement, the
         Shareholders Agreement or the Letter Agreement, or the consummation of
         the transactions contemplated hereby, except such consents, approvals
         or authorizations as have been obtained, or will have been obtained on
         or before the Closing Date;

    (ac) Oncometrics has no subsidiaries and does not own, directly or
         indirectly, any shares of capital stock, partnership or other interests
         in any corporation, partnership, joint venture or other Person;

    (ad) there are no actions, suits, judgments, investigations or proceedings
         of any kind whatsoever outstanding or pending or, to the best of
         Oncometrics' knowledge, threatened, by or against or affecting
         Oncometrics or its assets, at law or in equity or before or by any
         federal, provincial, state, municipal or other governmental
         department, commission, board, bureau or agency, domestic or foreign,
         of any kind whatsoever, which will materially adversely affect the
         business, operations or financial condition of Oncometrics, or any of
         its assets or properties, or which materially adversely affect or may
         materially adversely affect the issuance and sale of the Subscribed
         Shares or any action taken or to be taken by Oncometrics pursuant to
         or in connection with this Agreement;

    (ae) Oncometrics has received no notice of and is not in default or breach
         of, and the execution and delivery and performance of and compliance


                                          13

<PAGE>


         with the terms of this Agreement, the Shareholders Agreement and the
         Letter Agreement does not and will not conflict with, or result in any
         breach of or the acceleration of any indebtedness under, or constitute
         a default under, any term or provision of the Memorandum, Articles or
         resolutions of Oncometrics, or of any indenture, contract, agreement,
         instrument, lease or other document to which Oncometrics is a party or
         by which it is bound, or any judgment, decree, order, statute, rule or
         regulation applicable to Oncometrics, which default or breach might
         reasonably be expected to materially adversely affect the assets,
         business or condition (financial or otherwise) of Oncometrics; and

    (af) no securities commission or similar regulatory authority in Canada or
         United States has issued any order preventing or suspending trading in
         any securities of Oncometrics.

3.2      REPRESENTATIONS OF ACCUMED.  AccuMed hereby represents, warrants and
acknowledges as follows:

    (a)  AccuMed is a company duly incorporated, organized and validly existing
         under the laws of the State of Delaware;

    (b)  AccuMed has all necessary corporate power, capacity and authority to
         enter into this Agreement and to perform and observe its obligations
         and agreements herein contained, including, without limitation, to
         purchase the Subscribed Shares from Oncometrics;

    (c)  AccuMed has taken all actions necessary to authorize and enter into
         and perform its obligations under this Agreement and this Agreement
         has been duly executed and delivered by AccuMed and is a valid and
         binding obligation of AccuMed enforceable in accordance with its
         terms, except as may be limited by laws of general application
         affecting the rights of creditors and principles of equity;

    (d)  AccuMed will, prior to Closing, have taken all actions necessary to
         authorize and enter into and perform its obligations under the


                                          14

<PAGE>


         Shareholders Agreement and the Letter Agreement, and each of such
         agreements will, when duly executed and delivered by AccuMed, be a
         valid and binding obligation of AccuMed enforceable in accordance with
         its respective terms, except as may be limited by laws of general
         application affecting the rights of creditors and principles of
         equity;

    (e)  no consent, approval or authorization of any third party or of any
         governmental authority is required to be obtained on the part of
         AccuMed to permit the execution or delivery of this Agreement, the
         Shareholders Agreement or the Letter Agreement or the consummation of
         the transactions contemplated hereby, except such consents, approvals
         or authorizations as have been obtained, or will have been obtained on
         or before the Closing Date;

    (f)  the execution and delivery of each of this Agreement, the Shareholders
         Agreement and the Letter Agreement by AccuMed and the performance of
         its obligations hereunder does not and will not conflict with or
         result in the breach or violation of any law or regulation of any
         governmental authority or any of the terms and provisions of the
         Certificate of Incorporation or Bylaws of AccuMed or any indenture,
         agreement, contract or commitment to which AccuMed is a party or
         otherwise subject;

    (g)  the issue and sale of the Subscribed Shares to AccuMed is being made
         in reliance upon exemptions from the requirements of the B.C. Act as
         to the involvement of a registered dealer, the filing of a prospectus
         and the delivery of an offering memorandum relating to the sale of the
         Subscribed Shares, and, as a result, AccuMed will be restricted from
         using most of the civil remedies available to it under such Act;

    (h)  the Subscribed Shares have not been registered under the 1933 Act, or
         under any state securities laws, and may not be offered or sold in the
         United States unless registered thereunder or unless an exemption from
         such requirements is available;


                                          15

<PAGE>


    (i)  AccuMed is an "accredited investor" as that term is defined in
         Regulation D promulgated under the 1933 Act;

    (j)  AccuMed has such knowledge and experience in financial and business
         matters as is required in order to assess and evaluate the merits and
         risks of its purchase of the Subscribed Shares;

    (k)  the Subscribed Shares cannot readily be sold or disposed of, since
         there will be no public market, and it may not be possible to sell or
         dispose of the Subscribed Shares at all.  AccuMed represents that it:

         (i)  has liquid assets sufficient to ensure that its holding of the
              Subscribed Shares will cause no undue financial difficulties to
              it;

        (ii)  can afford the complete loss of its investment in the Subscribed
              Shares; and

       (iii)  can provide for its current needs and possible contingencies
              without the need to sell or dispose of the Subscribed Shares;

    (l)  AccuMed is acquiring the Subscribed Shares as principal, for its own
         account and not on behalf of others, and for purposes of investment
         only and not with a view to resale or distribution of all or any part
         thereof;

    (m)  AccuMed has not been formed solely or primarily for the purpose of
         purchasing the Subscribed Shares (or any other securities) pursuant to
         exemptions from the registration and prospectus requirements contained
         in the B.C. Act (or in any other applicable securities legislation);

    (n)  AccuMed has been afforded with full access to all relevant financial,
         technical, operational and corporate information relating to
         Oncometrics, the Assets and the Subscribed Shares, has been afforded
         an opportunity to ask such questions of Oncometrics' officers,
         employees, agents, accountants and representatives concerning the


                                          16

<PAGE>


         foregoing and all other relevant matters as it has deemed necessary or
         desirable, has been given all such information that has been requested
         in order to assess and evaluate the Subscribed Shares and the merits
         and the risks of the transactions contemplated herein, and, as a
         result, has acquired sufficient information concerning Oncometrics to
         make an informed and knowledgeable decision with respect to the
         purchase of the Subscribed Shares;

    (o)  the business plans and executive summaries of Oncometrics dated
         December, 1995 and May, 1996 were prepared by its management for
         internal purposes only, and not with a view to creating any legal
         rights or obligations, and that in deciding to purchase the Subscribed
         Shares AccuMed has not relied upon such documents or upon any other
         representations or warranties made by or on behalf of Oncometrics or
         Xillix, other than those representations and warranties of Oncometrics
         expressly set forth in this Agreement;

    (p)  AccuMed has not received, nor has it requested, nor does it have any
         need to receive, any offering memorandum or other document (other than
         the Financial Statements) describing the business and affairs of
         Oncometrics which has been prepared for delivery to, and review by,
         prospective purchasers in order to assist it in making an investment
         decision in respect of the Subscribed Shares;

    (q)  AccuMed has not been induced to enter into this Agreement or to
         purchase the Subscribed Shares by any advertisement by or in radio,
         television or printed media of general and regular paid circulation;

    (r)  AccuMed has been independently advised as to restrictions with respect
         to trading in the Subscribed Shares imposed by the B.C. Act and the
         1933 Act, confirms that no representation has been made to it by or on
         behalf of Oncometrics with respect thereto, and acknowledges that it
         is aware of the characteristics of the Subscribed Shares, the risks
         relating to an investment therein and the fact that it will not be
         able to resell the Subscribed Shares except in accordance with limited
         exemptions under applicable securities legislation and regulatory
         policy; and


                                          17

<PAGE>


    (s)  the certificate representing the Subscribed Shares to be delivered to
         AccuMed pursuant to section 8.1(a) will contain a legend providing
         notice of the restrictions contained in the Shareholders Agreement and
         the resale restrictions applicable thereto under the B.C. Act, the
         1933 Act and any other applicable securities law, and that AccuMed
         will not sell or dispose of all or any part of the Subscribed Shares
         except in accordance with such restrictions.

4.       SURVIVAL AND RELIANCE

4.1      SURVIVAL.  The representations and warranties contained in this
Agreement shall survive the Closing, the payment of the Subscription Price and
the issue and sale of the Subscribed Shares.

4.2      RELIANCE.  Each of the Parties acknowledges and agrees that the other
Party has entered into this Agreement relying on the warranties and
representations and other terms and conditions of this Agreement,
notwithstanding any independent searches, enquiries or other investigations
undertaken by or on behalf of such other Party.

5.       COVENANTS

5.1      COVENANTS OF ONCOMETRICS.  Oncometrics covenants and agrees to and
with AccuMed that:

    (a)  Oncometrics will, prior to the Closing, fulfil any and all
         requirements (including, without limitation, compliance with the B.C.
         Act) required to be fulfilled by Oncometrics to enable the Subscribed
         Shares to be issued and sold to AccuMed in accordance with the terms
         of this Agreement;

    (b)  Oncometrics will, on or before the Closing Date, at its expense,
         execute and deliver, or cause to be delivered, each of the documents
         referred to in section 8.1 hereof;


                                          18

<PAGE>


    (c)  at all reasonable times prior to the Closing Date, and upon reasonable
         notice being provided by AccuMed, permit representatives of AccuMed
         full access to the business premises of Oncometrics and its books and
         records, including contracts and agreements, minute books and
         registers of members, and give AccuMed and its representatives such
         information with respect thereto as may be reasonably requested and
         permit AccuMed to make such audit of the books of account of
         Oncometrics and physical verification of the Assets as AccuMed may see
         fit.  The cost of any such audit and verification will be for the
         account of AccuMed.  Oncometrics will cause its financial officers to
         discuss and answer fully any and all questions of AccuMed relating to
         the Assets or the business and affairs of Oncometrics;

    (d)  use all commercially reasonable efforts to assist AccuMed, at its
         cost, in obtaining from all appropriate federal, provincial, state,
         municipal and other governmental or administrative bodies and all
         other Persons, such approvals and consents as are necessary in order
         to permit the issuance and sale of the Subscribed Shares to AccuMed as
         contemplated herein; and

    (e)  from the date of this Agreement to the Closing Date:

         (i)  carry on its business in the ordinary and normal course, in a
              prudent, businesslike and efficient manner, and substantially in
              accordance with the procedures and practices in effect on the
              date hereof;

        (ii)  use its best efforts to preserve and maintain the existing
              licences, franchises, rights and privileges pertinent to the
              business and operations of Oncometrics and the goodwill of its
              business and to preserve intact its business organization and
              relationship with its employees; and

       (iii)  do all necessary repairs and maintenance to its material assets
              and take reasonable care to protect and safeguard those assets.


                                          19

<PAGE>


5.2      COVENANTS OF ACCUMED.  AccuMed covenants to and with Oncometrics that
it will:

    (a)  on or before the Closing Date, at its expense, execute and deliver, or
         cause to be delivered, each of the documents referred to in
         section 8.2 hereof;

    (b)  use all commercially reasonable efforts to obtain any and all
         approvals referred to in section 5.1(d);

    (c)  comply with any and all applicable requirements of the INVESTMENT
         CANADA ACT with respect to its purchase of the Subscribed Shares;

    (d)  if required by the B.C. Act, the 1933 Act or any other applicable
         securities laws, execute, deliver, file and otherwise assist
         Oncometrics in filing, such reports, undertakings and other documents
         as are required thereunder with respect to the issue and sale of the
         Subscribed Shares;

    (e)  use its best efforts to complete the Share Subscription by September
         30, 1996;

    (f)  if the Share Subscription does not complete in accordance with the
         terms of this Agreement, forthwith return to Oncometrics all data,
         documents, information and other material provided by Oncometrics to
         AccuMed in respect of the Assets or Oncometrics, including, without
         limitation, any copies of the same made by AccuMed or its employees,
         agents or advisors; and

    (g)  if the Share Subscription does not complete in accordance with the
         terms of this Agreement, other than as a result of a breach of this
         Agreement or the Share Purchase Agreement by Oncometrics or Xillix,
         respectively, pay all reasonable legal fees incurred by Oncometrics in
         connection with the transactions contemplated herein.


                                          20

<PAGE>


6.       FINANCING OF ONCOMETRICS PRIOR TO CLOSING

6.1      FINANCING OF ONCOMETRICS.  The Parties acknowledge that Xillix has
financed and will, until the Closing, continue to finance, the business and
operations of Oncometrics.

6.2      CONVERSION OF PAST FINANCING.  Any and all financing provided by
Xillix on or before August 31, 1996 has been converted into or exchanged for, or
will be converted into or exchanged for, Common shares of Oncometrics, which
will comprise part of the Xillix Shares.

6.3      FUTURE FINANCING.  Any and all financing provided by Xillix to
Oncometrics, and any and all obligations of Oncometrics incurred or paid by
Xillix, in either case in respect of the period from and after August 31, 1996
to and including the Closing Date, shall be evidenced by one or more demand
promissory notes issued by Oncometrics to Xillix (copies of which will be
provided to AccuMed), shall bear interest at the prime rate of interest
announced from time to time by Royal Bank of Canada plus 2% per annum, and shall
be paid by Oncometrics to Xillix at Closing.  If any such amount is not
determinable at Closing, such amount, together with interest at the aforesaid
rate, will be paid by Oncometrics to Xillix within 30 days after Oncometrics
receives satisfactory evidence thereof.

7.       CONDITIONS PRECEDENT

7.1      IN FAVOUR OF ACCUMED.  Notwithstanding anything herein contained, the
obligation of AccuMed to carry out the terms of this Agreement and to complete
the Share Subscription is subject to the fulfillment, on or before the Closing
Date, of each of the following conditions:

    (a)  AccuMed shall have approved the form and substance of the Shareholders
         Agreement and the Letter Agreement;

    (b)  AccuMed and Xillix shall have completed the Share Purchase
         concurrently therewith;


                                          21

<PAGE>


    (c)  AccuMed shall have obtained any and all approvals referred to in
         section 5.1(d);

    (d)  Oncometrics shall have entered into an employment agreement with each
         of Branko Palcic, Dave Garner and Alan Harrison, in form and substance
         satisfactory to each of the Parties;

    (e)  each of the warranties and representations of Oncometrics shall be
         true and correct in all material respects as of the Closing Date;

    (f)  Oncometrics shall have complied with all of the covenants and
         agreements required to be performed or complied with by it hereunder;

    (g)  AccuMed shall have completed its review of the IP Assets and shall be
         reasonably satisfied that the representations and warranties of
         Oncometrics contained in this Agreement relating to such assets are
         accurate in all material respects; and

    (h)  AccuMed shall have consummated the underwritten public offering of its
         common stock (the "Underwritten Offering"), as contemplated in the
         Registration Statement on Form S-2 (Regis. No. 333-09011) as filed
         with the Securities and Exchange Commission, as may be amended.

         The conditions set forth in section 7.1 are for the exclusive benefit
of AccuMed and may be waived by AccuMed in whole or in part on or before the
Closing Date.

7.2      IN FAVOUR OF ONCOMETRICS.  Notwithstanding anything herein contained,
the obligation of Oncometrics to carry out the terms of this Agreement and to
complete the Share Subscription is subject to the fulfillment, on or before the
Closing Date, of each of the following conditions:

    (a)  each of Oncometrics and Xillix shall have approved the form and
         substance of the Shareholders Agreement and the Letter Agreement;


                                          22

<PAGE>


    (b)  AccuMed and Xillix shall have completed the Share Purchase
         concurrently therewith;

    (c)  AccuMed shall have obtained any and all approvals referred to in
         section 5.1(d);

    (d)  each of the warranties and representations of AccuMed shall be true
         and correct in all material respects as of the Closing Date; and

    (e)  AccuMed shall have complied with all of the covenants and agreements
         required to be performed or complied with by it hereunder.

         The conditions set forth in section 7.2 are for the exclusive benefit
of Oncometrics and may be waived by Oncometrics in whole or in part on or before
the Closing Date.

8.       CLOSING DELIVERIES

8.1      BY ONCOMETRICS.  At the Closing, Oncometrics shall deliver or cause to
be delivered to AccuMed:

    (a)  a certified copy of resolutions of the directors of Oncometrics,
         certified by its Secretary, authorizing or ratifying, INTER ALIA, the
         issuance of the Subscribed Shares to AccuMed and the execution and
         delivery of this Agreement, the Shareholders Agreement, the Letter
         Agreement and each of the other agreements and instruments
         contemplated hereby;

    (b)  a share certificate representing the Subscribed Shares, registered in
         the name of AccuMed;

    (c)  a waiver, executed by Xillix, of its pre-emptive rights in respect of
         the allotment and issuance of the Subscribed Shares;

    (d)  a certificate of good standing for Oncometrics issued by the Registrar
         of Companies for the Province of British Columbia as of a date not
         more than 5 days prior to the Closing Date;


                                          23

<PAGE>


    (e)  the Shareholders Agreement, in form and substance satisfactory to both
         Parties, executed by Xillix and Oncometrics;

    (f)  the Letter Agreement, in form and substance satisfactory to both
         Parties, executed by Oncometrics;

    (g)  a copy of Oncometrics' cheque payable to 1991 Capital West Partners in
         full payment of its fees and expenses in connection with the Share
         Subscription;

    (h)  a certificate, executed by Oncometrics and dated the Closing Date, to
         the effect that the representations and warranties of Oncometrics
         contained in this Agreement are true and correct in all material
         respects as of the Closing Date and that Oncometrics has performed all
         agreements, obligations and covenants required hereunder to be
         performed by it on or before the Closing Date; and

    (i)  an opinion from the solicitors for Oncometrics with respect to the
         issue and sale of the Subscribed Shares, the corporate power and
         capacity of Oncometrics, the due authorization, execution and delivery
         by Oncometrics of this Agreement, the Shareholders Agreement and the
         Letter Agreement, and the good standing of Oncometrics, in form and
         substance satisfactory to AccuMed, acting reasonably.

8.2      BY ACCUMED.  At the Closing, AccuMed shall deliver or cause to be
delivered to Oncometrics:

    (a)  the certified cheque or bank draft referred to in section 2.2;

    (b)  the Shareholders Agreement, in form and substance satisfactory to both
         Parties, executed by AccuMed;

    (c)  the Letter Agreement, in form and substance satisfactory to both
         Parties, executed by AccuMed;


                                          24

<PAGE>


    (d)  an opinion from the solicitors for AccuMed with respect to the
         corporate power and capacity of AccuMed and the due authorization,
         execution and delivery by AccuMed of this Agreement, the Shareholders
         Agreement and the Letter Agreement, in form and substance satisfactory
         to Oncometrics, acting reasonably; and

    (e)  a certificate, executed by AccuMed and dated the Closing Date, to the
         effect that the representations and warranties of AccuMed contained in
         this Agreement are true and correct in all material respects as of the
         Closing Date and that AccuMed has performed all agreements,
         obligations and covenants required hereunder to be performed by it on
         or before the Closing Date.

9.       CLOSING AND TERMINATION

9.1      TIME AND PLACE OF CLOSING.  The completion of the purchase and sale of
the Subscribed Shares as contemplated by this Agreement (the "Closing") shall
take place at 10:00 a.m. (Vancouver time) on a date (the "Closing Date") to be
mutually agreed upon by AccuMed and Xillix, in writing, which shall be on or
prior to five business days following the date on which the Underwritten
Offering is consummated, but which shall not, in any event, be later than
October 15, 1996.  The Closing shall take place at the registered offices of
Oncometrics in Richmond, Canada, or at such other place as the Parties may agree
upon in writing. AccuMed shall keep Xillix informed of the anticipated date of
consummation of the Underwritten Offering.

9.2      CLOSING PROCEDURES.  All documents to be delivered at the Closing will
be delivered to the solicitors for Oncometrics, in escrow, on or before the
Closing Date.  All matters of payment, execution and delivery of documents
required to be paid and/or delivered at Closing will be deemed to be concurrent
requirements, and the Closing shall not occur until all such payments and
documents have been paid, executed and/or delivered, as the case may be.

9.3      TERMINATION.  If the Closing has not occurred on or before October 15,
1996, either Party may terminate this Agreement by giving written notice of such


                                          25

<PAGE>


termination to the other Party, in which case this Agreement shall immediately
terminate, provided that:

    (a)  subject to section 9.3(b), the terminating Party is not in material
         breach of any of its obligations, agreements, covenants,
         representations or warranties pursuant to this Agreement;

    (b)  if each of the Parties is in material breach of any of its
         obligations, agreements, covenants, representations or warranties
         pursuant to this Agreement, section 9.3(a) shall not apply; and

    (c)  such termination shall not relieve either Party from liability for its
         breach of any of the terms or provisions of this Agreement.

10.      INDEMNIFICATION

10.1     BY ONCOMETRICS.  Oncometrics will, upon demand, indemnify, defend
         and hold harmless AccuMed from and against any and all demands,
         claims, actions, proceedings, losses, damages, liabilities, costs and
         expenses suffered or incurred by AccuMed, directly or indirectly, by
         reason of a breach of or any inaccuracy in any of the representations
         or warranties contained in section 3.1 hereof or a breach of any of the
         covenants contained in section 5.1 hereof.

10.2     BY ACCUMED.  AccuMed will, upon demand, indemnify, defend and hold
         harmless Oncometrics from and against any and all demands, claims,
         actions, proceedings, losses, damages, liabilities, costs and expenses
         suffered or incurred by Oncometrics, directly or indirectly, by reason
         of a breach of or any inaccuracy in any of the representations or
         warranties contained in section 3.2 hereof or a breach of any of the
         covenants contained in section 5.2 hereof.

10.3     LIMITATION.  Notwithstanding the provisions of sections 10.1 and
10.2, and notwithstanding any inaccuracy or incorrectness of any provision in 
this Agreement, no claim for indemnification, damages or other relief will be 
valid against either Party unless such claim is made within a period of 12 
months of the Closing Date and any claim not made within such time will 
thereafter be barred.

                                          26

<PAGE>


10.4     MONETARY LIMITATION.  Neither Party will make any claim for
indemnity hereunder unless the claim, or the total of all claims, by such Party
exceeds $500,000, in which event the indemnity contained herein will include all
amounts up to and in excess of $500,000.

10.5     NOTIFICATION AND CONDUCT OF CLAIM.  If a claim, other than a claim
for fraud, is made against either Party (the "Indemnifier"), as a result of
which the other Party (the "Other") wishes to assert a claim against the
Indemnifier under section 10.1 or 10.2, as the case may be, the Other will, as
soon as practicable, notify the Indemnifier thereof.  In such event, the
Indemnifier may, in its sole discretion, either take conduct of or assist in any
matter or proceeding involving third parties in order to contest and/or settle
such claim. The Other will not take any step or proceeding to waive or extend
any applicable limitation period.  If the Indemnifier takes conduct of such
matter or proceeding, the Indemnifier may, and the Other hereby authorizes the
Indemnifier to, make such investigations, negotiations and settlements as it
deems expedient.  No settlement shall be entered into without the written
consent of both Parties, which shall not be unreasonably withheld.  All expenses
incurred in connection with such contest or settlement will be paid by the
Indemnifier if the Other prevails.

11.      DISPUTE RESOLUTION

11.1     ATTORNMENT.  Each Party hereby irrevocably attorns to the jurisdiction
of the courts of the Province of British Columbia, agrees that such courts shall
have IN PERSONAM jurisdiction over it, consents to service of process in any
manner authorized by British Columbia law, and agrees that, subject to
section 11.2, any action, suit or proceeding with respect to any disputes,
differences or controversies arising out of, in relation to or in connection
with this Agreement, or any breach hereof, shall be brought in the courts of the
Province of British Columbia.  Each Party further agrees that a final judgment
in any such action or suit shall be conclusive and may be enforced in any other
jurisdiction by suit or action on the judgment or in any other manner specified
by law.

11.2     ARBITRATION.  Any difference, controversy or dispute arising out of or
in connection with this Agreement, including, without limiting the generality of
the foregoing, any question regarding its existence, validity or termination,
shall be


                                          27

<PAGE>


referred to and finally resolved by arbitration administered by the British
Columbia International Commercial Arbitration Centre pursuant to its Rules.  The
place of the arbitration shall be Vancouver, Canada.

12.      NOTICES

12.1     NOTICES.  All notices given pursuant to this Agreement shall be in
writing and shall be made by hand delivery, first class mail (registered or
certified, return receipt requested), telex, telecopier, or overnight air
courier guaranteeing next day delivery to the relevant address specified below.
Except as otherwise provided in this Agreement, each such notice shall be deemed
given: at the time delivered by hand, if personally delivered or mailed postage
prepaid; when answered back, if telexed; when receipt is acknowledged, if
telecopied; and the next business day after timely delivery to the courier, if
sent by overnight air courier guaranteeing next day delivery.

         If to Oncometrics, to:

         Oncometrics Imaging Corp.
         300 - 13775 Commerce Parkway
         Richmond, B.C.
         V6V 2V4

         Attention:  President

         Telecopy No.:       604-278-5111
         Confirmation No.:   604-278-5000

         with a copy to:

         Fraser & Beatty
         1500 - 1040 West Georgia Street
         Vancouver, B.C.
         V6E 4H8

         Attention:     Gary R. Sollis

         Telecopy No.:       604-683-5214
         Confirmation No.:   604-687-4460


                                          28

<PAGE>


         If to AccuMed, to:

         AccuMed International, Inc.
         900 North Franklin Street, Suite 401
         Chicago, Illinois  60610

         Attention:  Peter P. Gombrich, Chief Executive Officer

         Telecopy No.:       312-642-6884
         Confirmation No.:   312-642-9200

         with a copy to:

         Graham & James LLP
         400 Capitol Mall, Suite 2400
         Sacramento, California  95814

         Attention:  Kevin A. Coyle, Esq.

         Telecopy No.:       916-441-6700
         Confirmation No.:   916-558-6700

13.      GENERAL PROVISIONS

13.1     TIME OF ESSENCE.  Time shall be of the essence of this Agreement.

13.2     FURTHER ASSURANCES.  Each of the Parties shall, at the request and
expense of the other, both before and after the Closing, do any and all such
further acts and things and execute and deliver any and all such further
documents and instruments as are necessary or desirable to carry out the intent
of this Agreement.

13.3     WHOLE AGREEMENT.  This Agreement contains the whole agreement between
the Parties in respect of the purchase and sale of the Subscribed Shares and
supersedes all prior correspondence, agreements and understandings, oral or
written, by or between the Parties with respect thereto, including, without
limitation, the Letter of Intent dated July 3, 1996 among AccuMed, Xillix and
Oncometrics and the business plans and executive summaries (except only the
operating budget contained in the May, 1996 business plan) of Oncometrics dated
December, 1995 and May, 1996, respectively, but excluding the Mutual
Nondisclosure Agreement between AccuMed and Oncometrics dated effective as of


                                          29

<PAGE>


December 1, 1995.  There are no warranties, representations, terms, conditions
or collateral agreements, express, implied or otherwise, relating to the subject
matter hereof, other than as expressly set forth in this Agreement.

13.4     AMENDMENTS AND WAIVERS.  No amendment, waiver or termination of this
Agreement shall be binding unless executed in writing by the Party to be bound
thereby.  No waiver of any provision of this Agreement shall be deemed or shall
constitute a waiver of any other provision nor shall any such waiver constitute
a continuing waiver unless otherwise expressly provided.

13.5     ASSIGNMENT.  This Agreement may not be assigned by either Party
without the prior written consent of the other Party, which consent may be
arbitrarily withheld.

13.6     CONFIDENTIALITY.  Neither of the Parties will disclose the existence
or any of the terms or conditions of this Agreement to any Person who is not a
director, officer, employee or bona fide authorized representative (which is
deemed to include professional advisors) of such Party, without the prior
written consent of the other Party, which consent shall not be unreasonably
withheld, except:

    (a)  if such disclosure is required by law, including, without limitation,
         the disclosure requirements of the regulations promulgated under the
         B.C. Act and 1933 Act; or

    (b)  if such disclosure is in the normal course of such Party's business
         and such disclosure is made on a "need-to-know" and confidential
         basis,

and, if time permits, each Party shall, prior to issuing any press release or
making any other public announcement concerning the transactions contemplated
hereby, provide a copy of the text of such release or announcement to the other
Party for its review and comments.

13.7     ENUREMENT.  This Agreement shall be binding upon and shall enure to
the benefit of the Parties and their respective successors and permitted
assigns.


                                          30

<PAGE>


13.8     COUNTERPARTS.  This Agreement may be executed in one or more
counterparts and such counterparts may be transmitted by electronic facsimile,
and each such counterpart shall be deemed to be an original and together such
counterparts shall constitute one document.

         IN WITNESS WHEREOF the Parties have duly executed this Agreement as of
the day and year first above written.


                                  ONCOMETRICS IMAGING CORP.


                                  By: /s/ Pierre Leduc
                                     -----------------------------------
                                       Authorized Signatory

                                  By:____________________________________
                                       Authorized Signatory


                                  ACCUMED INTERNATIONAL, INC.


                                  By: /s/ Peter P. Gombrich
                                     -----------------------------------
                                       Peter P. Gombrich,
                                       Chief Executive Officer


                                          31


<PAGE>




- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------


                               STOCK PURCHASE AGREEMENT

                                Dated August 15, 1996

                                     by and among

                             ACCUMED INTERNATIONAL, INC.,

                                 RADCO VENTURES, INC.

                                         and

                     THE SELLING STOCKHOLDERS REFERRED TO HEREIN

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

<PAGE>

                                  TABLE OF CONTENTS


                                                                            PAGE
                                                                            ----
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STOCK PURCHASE AGREEMENT . . . . . . . . . . . . . . . . . . . . . . . . .  1

R E C I T A L S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1

    Section 1. Purchase and Sale of Shares.. . . . . . . . . . . . . . . .  1
    1.1  Sale of Shares. . . . . . . . . . . . . . . . . . . . . . . . . .  1
    1.2  Payment of the Purchase Price . . . . . . . . . . . . . . . . . .  2

    Section 2.  Closing. . . . . . . . . . . . . . . . . . . . . . . . . .  2
    2.1  Closing Date. . . . . . . . . . . . . . . . . . . . . . . . . . .  2
    2.2  Delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2

    Section 3.  Representations and Warranties of the
    Selling Stockholders . . . . . . . . . . . . . . . . . . . . . . . . .  2
    3.1  Title to Shares . . . . . . . . . . . . . . . . . . . . . . . . .  2
    3.2  Validity of Agreement; Authorization. . . . . . . . . . . . . . .  2
    3.3  No Conflict . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
    3.4  Non-U.S. Person.. . . . . . . . . . . . . . . . . . . . . . . . .  3

    Section 4.  Representations and Warranties of the Purchaser. . . . . .  3
    4.1  Organization. . . . . . . . . . . . . . . . . . . . . . . . . . .  3
    4.2  Validity of Agreement . . . . . . . . . . . . . . . . . . . . . .  3
    4.3  No Conflict . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
    4.4  Merger with Purchaser; No Resale of Shares. . . . . . . . . . . .  4
    4.5  Legend Restrictions . . . . . . . . . . . . . . . . . . . . . . .  4

    Section 5.  Covenants of the Selling Stockholders. . . . . . . . . . .  4
    5.1  Implementation of Representations and Warranties. . . . . . . . .  4
    5.2  Communications. . . . . . . . . . . . . . . . . . . . . . . . . .  4
    5.3  Other Negotiations. . . . . . . . . . . . . . . . . . . . . . . .  4

    Section 6. Covenants of the Purchaser. . . . . . . . . . . . . . . . .  4
    6.1  Implementation of Representation and Warranties.. . . . . . . . .  4
    6.2  Assumption of Promissory Notes. . . . . . . . . . . . . . . . . .  5

    Section 7.  Conditions to Obligations of the Selling Stockholders. . .  5
    7.1  Accuracy of Representations and Warranties. . . . . . . . . . . .  5
    7.2  Fulfillment of Covenants. . . . . . . . . . . . . . . . . . . . .  5
    7.3  Approval of Sale. . . . . . . . . . . . . . . . . . . . . . . . .  5
    7.4  No Litigation . . . . . . . . . . . . . . . . . . . . . . . . . .  5
    7.5  Repayment of Promissory Notes . . . . . . . . . . . . . . . . . .  5

    Section 8.  Conditions to Obligations of the Purchaser . . . . . . . .  6
    8.1  Accuracy of Representations and Warranties. . . . . . . . . . . .  6
    8.2  Fulfillment of Covenants. . . . . . . . . . . . . . . . . . . . .  6
    8.3  Approval of Sale. . . . . . . . . . . . . . . . . . . . . . . . .  6
    8.4  Consents Obtained . . . . . . . . . . . . . . . . . . . . . . . .  6

<PAGE>

    8.5  No Litigation . . . . . . . . . . . . . . . . . . . . . . . . . .  6
    8.6  Consummation of Stock Offering. . . . . . . . . . . . . . . . . .  6

    Section 9.  Termination; Survival of Representations,
    Warranties and Covenants . . . . . . . . . . . . . . . . . . . . . . .  7
    9.1  Termination . . . . . . . . . . . . . . . . . . . . . . . . . . .  7
    9.2  Notice of Termination . . . . . . . . . . . . . . . . . . . . . .  7
    9.3  Effect of Termination . . . . . . . . . . . . . . . . . . . . . .  7
    9.4  Survival  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8

    Section 10.  Payment of Expenses; Finder's Fee . . . . . . . . . . . .  8
    10.1  Expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
    10.2  Brokers; Finder's Fee. . . . . . . . . . . . . . . . . . . . . .  8

    Section 11.  General Provisions. . . . . . . . . . . . . . . . . . . .  8
    11.1  Notices. . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
    11.2  Headings . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
    11.3  Counterparts . . . . . . . . . . . . . . . . . . . . . . . . . .  9
    11.4  Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
    11.5  Waiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
    11.6  Entire Agreement . . . . . . . . . . . . . . . . . . . . . . . . 10
    11.7  Applicable Law . . . . . . . . . . . . . . . . . . . . . . . . . 10
    11.8  Severability . . . . . . . . . . . . . . . . . . . . . . . . . . 10


                                          ii

<PAGE>

                               STOCK PURCHASE AGREEMENT

         STOCK PURCHASE AGREEMENT (this "Agreement") dated August 15, 1996, by
and among AccuMed International, Inc., a Delaware corporation (the "Purchaser"),
RADCO Ventures, Inc., a Delaware corporation ("the Company"), American Equities
Overseas, Inc., a Panama corporation ("American Equities"), and the holders of
common stock of the Company named on SCHEDULE 1 hereto (individually a "Non-AEO
Selling Stockholder" and collectively, the "Non-AEO Selling Stockholders" and
together with American Equities, the "Selling Stockholders").

                                   R E C I T A L S:
                                   - - - - - - - -

         A.   The Non-AEO Selling Stockholders are the holders of an aggregate
of 400,000 shares of the common stock, par value $0.01 per share (the "Common
Stock"), of the Company, which constitutes 80% of the issued and outstanding
capital stock of the Company and American Equities is the holder of 50,000
shares of Common Stock, which constitutes 10% of the issued and outstanding
capital stock of the Company (all such shares referred to in this Recital A are
referred to collectively as the "Shares");

         B.   The Purchaser desires to purchase from the Selling Stockholders
and the Selling Stockholders desire to sell to the Purchaser, all of the Shares
in consideration for payment of cash in amounts as described in Section 1;

         NOW, THEREFORE, in consideration of the mutual promises and covenants
contained herein, and intending to be legally bound, the parties hereby agree as
follows:

    Section 1. PURCHASE AND SALE OF SHARES.

         1.1  SALE OF SHARES.  Subject to the terms and conditions of this
Agreement, on the Closing Date (as defined in SECTION 2.1):

              (a)  Each Non-AEO Selling Stockholder agrees to sell, and the
Purchaser agrees to purchase, the respective number of Shares set forth opposite
such Non-AEO Selling Stockholder's name on SCHEDULE 1 for consideration per
share in an amount of cash equal to (x) $1,381,250 less (y) the principal and
accrued interest on the Notes (as defined in SECTION 7.5) through the date on
which a Stock Offering (as defined in SECTION 8.6) is consummated, divided by
(z) 400,000 (the number of shares) (the "Non-AEO Purchase Price").

              (b)  American Equities agrees to sell, and the Purchaser agrees
to purchase, 50,000 shares of Common Stock held by American Equities for
consideration of an aggregate of $13,831 in cash (the "AEO Purchase Price" and
together with the Non-AEO Purchase Price, the "Purchase Price").


                                          1

<PAGE>
         1.2  PAYMENT OF THE PURCHASE PRICE.  The Purchase Price is payable on
the Closing Date by checks made payable to the Selling Stockholders or, at the
election of the Selling Stockholders, by wire transfer to the respective
accounts designated by the Selling Stockholders, in the respective amounts
determined in accordance with SECTION 1.1.

    Section 2.  CLOSING.

         2.1  CLOSING DATE.  The closing of the purchase and sale of the Shares
hereunder (the "Closing") shall be held at the offices of the Purchaser at 900
North Franklin Street, Suite 401, Chicago, Illinois at 10:00 a.m.(Central Time).
The Closing shall be held on a date mutually agreed (the "Closing Date") by the
Purchaser and American Equities Overseas, as representative of the Selling
Stockholders (the "Representative"), which shall be on or prior to five business
days following the date on which a Stock Offering (as defined in SECTION 8.6) is
consummated, if a Stock Offering is consummated, or at such other time and place
upon which the Purchaser and the Representative shall mutually agree.

         2.2  DELIVERY.  At the Closing, each Selling Stockholder shall deliver
to the Purchaser a stock certificate or certificates, duly endorsed with
signatures guaranteed, representing the respective number of Shares of Common
Stock set forth opposite its name on SCHEDULE 1, in the case of Non-AEO Selling
Stockholders, and 50,000 Shares, in the case of American Equities.

    Section 3.  REPRESENTATIONS AND WARRANTIES OF THE SELLING STOCKHOLDERS
The Selling Stockholders represent and warrant, jointly and not severally, to
the Purchaser that:

         3.1  TITLE TO SHARES.  Each Non-AEO Selling Stockholder is the owner,
beneficially and of record, of the respective number of Shares of Common Stock
set forth opposite its name on SCHEDULE 1, and American Equities owns 50,000
Shares, in each case, free and clear of any liens, encumbrances, security
agreements, options, claims, charges or restrictions of any nature whatsoever.

         3.2  VALIDITY OF AGREEMENT; AUTHORIZATION.  Each of the Selling
Stockholders has the full power and authority to execute and deliver this
Agreement.  This Agreement constitutes the valid and binding obligation of each
of the Selling Stockholders enforceable in accordance with its terms, except as
enforcement may be limited by applicable bankruptcy laws or other similar laws
affecting creditors' rights generally and by principles of equity.  The
execution and delivery of this Agreement by each of the Selling Stockholders and
the consummation of the transactions contemplated hereby, have been duly
authorized by all necessary corporate or other action, and such execution and
delivery do not require the consent, approval or authorization of any person,
public authority or other entity which consent will not have been obtained prior
to the Closing.


                                          2

<PAGE>

          3.3 NO CONFLICT.  The execution and delivery of this Agreement by
each of the Selling Stockholders and the performance of their respective
obligations hereunder:  (i) are not in violation or breach of, and will not
conflict with or constitute a default under, any of the terms of their
respective charter documents, if applicable, or any material note, debt
instrument, security agreement, lease, deed of trust or mortgage, or other
contract, agreement or commitment binding upon the Selling Stockholders or any
of their respective assets or properties; and (ii) will not result in the
creation or imposition of any material lien, encumbrance, equity or restriction
in favor of any third party upon any of the Shares set forth opposite its name
on SCHEDULE 1, in the case of Non-AEO Selling Stockholders, and 50,000 Shares,
in the case of American Equities.  There are no consents, waivers or approvals
of third parties required to be obtained by the Selling Stockholders,
respectively, in connection with the execution and delivery of this Agreement by
the Selling Stockholders, respectively, and the performance of their respective
obligations hereunder.

         3.4  NON-U.S. PERSON.  Each Non-AEO Selling Stockholder was, at the
time of purchase of its Shares from the Company, is, at the date hereof, and
will be, on the Closing Date, located and maintaining its residence outside the
United States.

    Section 4.  REPRESENTATIONS AND WARRANTIES OF THE PURCHASER. The Purchaser
represents and warrants to the Company and the Selling Stockholders that:

         4.1  ORGANIZATION.  The Purchaser is a corporation duly organized,
validly existing and in good standing under the laws of the State of Delaware.

         4.2  VALIDITY OF AGREEMENT.  The Purchaser has full power and
authority to execute and deliver this Agreement.  This Agreement constitutes the
valid and binding obligation of the Purchaser, enforceable in accordance with
its terms, except as enforcement may be limited by applicable bankruptcy laws or
other similar laws affecting creditors' rights generally and by principles of
equity.  The execution and delivery of this Agreement by the Purchaser, and the
consummation of the transactions contemplated hereby, have been duly authorized
by all necessary corporate action, and such execution and delivery do not
require the consent, approval or authorization of any person, public authority
or other entity.

         4.3  NO CONFLICT.  The execution, delivery and performance by the
Purchaser of this Agreement, and the consummation of the transactions herein
contemplated, will not conflict with, or result in a breach of the terms of, or
constitute a default under or violation of, any law or regulation of any
governmental authority or any provision of the Certificate of Incorporation or
Bylaws of the Purchaser.  No consent of any third party and no consent of any
governmental authority is required to


                                          3

<PAGE>

be obtained on the part of the Purchaser to permit the consummation of the
transactions contemplated by this Agreement which consent will not have been
received before the Closing Date.

         4.4  MERGER WITH PURCHASER; NO RESALE OF SHARES.  The Purchaser is
acquiring the Shares of Common Stock for its own account with the intent of
merging the Company with and into the

Purchaser and is not acquiring the Shares with a view to or for resale in
connection with, any distribution thereof within the meaning of the Securities
Act of 1933, as amended (the "Securities Act").

         4.5  LEGEND RESTRICTIONS.  Purchaser acknowledges that the
certificates representing the Shares of Common Stock purchased hereunder shall
be endorsed with a legend restricting transfer as necessary to conform to the
requirements of the Securities Act and any applicable state securities laws.

    Section 5.  COVENANTS OF THE SELLING STOCKHOLDERS. The Selling Stockholders
hereby jointly and not severally covenant:

         5.1  IMPLEMENTATION OF REPRESENTATIONS AND WARRANTIES.  The Selling
Stockholders shall use all reasonable efforts to render accurate as of the
Closing Date their respective representations and warranties contained in this
Agreement, and shall refrain from taking any action which would render
inaccurate as of the Closing Date any of such representations or warranties.

         5.2  COMMUNICATIONS.  Between the date hereof and the Closing Date,
the Selling Stockholders shall not furnish any communication to the public with
respect to the transactions contemplated by this Agreement without the prior
approval of the Purchaser as to the content thereof, which approval shall not
unreasonably be withheld by the Purchaser.

         5.3  OTHER NEGOTIATIONS.  Between the date hereof and the Closing Date
or the termination of this Agreement, whichever shall first occur, the Selling
Stockholders will not solicit an acquisition of the Shares or of the Company by
another person, firm or corporation, whether by consolidation, merger or
purchase or sale of business or assets or by the sale or exchange of stock.

    Section 6. COVENANTS OF THE PURCHASER.  The Purchaser hereby covenants
that:

         6.1  IMPLEMENTATION OF REPRESENTATION AND WARRANTIES.   The Purchaser
shall use all reasonable efforts to render accurate as of the Closing Date its
representations and warranties contained in this Agreement, and shall refrain
from taking any action which would render inaccurate as of the Closing Date any
of such representations or warranties.


                                          4

<PAGE>

         6.2   ASSUMPTION OF PROMISSORY NOTES.  If on or prior to December 31,
1996 (i) a Stock Offering (as defined in SECTION 8.6) shall not have been
consummated, and (ii) the Closing has not occurred, otherwise than due to
termination of this Agreement by the Purchaser pursuant to  SECTION 9.1(a), (c)
or (e), the Purchaser shall assume the obligations of the Company under the
Promissory Notes (as defined in SECTION 7.5).

    Section 7.  CONDITIONS TO OBLIGATIONS OF THE SELLING STOCKHOLDERS. The
obligations of the Selling Stockholders under this Agreement are, at the option
of the Selling Stockholders, subject to the satisfaction at or prior to the
Closing of the following conditions:

         7.1  ACCURACY OF REPRESENTATIONS AND WARRANTIES.  All of the
representations and warranties made by the Purchaser in this Agreement shall be
true in all material respects as of the Closing Date with the same force and
effect as though such representations and warranties had been made as of the
Closing Date, except for changes contemplated by this Agreement, and the
Purchaser shall have delivered to the Representative a certificate to such
effect dated the Closing Date and signed by its Chief Executive Officer.

         7.2  FULFILLMENT OF COVENANTS.  All of the terms, covenants and
conditions of this Agreement to be complied with and performed by the Purchaser
at or before the Closing Date shall have been duly complied with and performed,
and the Purchaser shall have delivered to the Representative a certificate to
such effect dated the Closing Date and signed by its Chief Executive Officer.

         7.3  APPROVAL OF SALE.  All authorizations, consents and approvals of
all federal, state and local governmental agencies and authorities required to
be obtained in order to permit consummation of the transactions contemplated by
this Agreement shall have been obtained.

         7.4  NO LITIGATION.  There shall be no litigation pending which has
been brought for the purpose of enjoining any transaction contemplated by this
Agreement or which would have the effect, if successful, of imposing a material
liability upon the Company or the Selling Stockholders because of such
transaction.

         7.5  REPAYMENT OF PROMISSORY NOTES.  Simultaneous to the purchase of
the Shares at the Closing, the Purchaser will cause the Company to repay in full
the Non-negotiable Promissory Notes (the "Promissory Notes") in the aggregate
outstanding principal amount of $1,187,500 and accrued and unpaid interest at a
rate of 10% per annum through the date on which a Stock Offering (as defined in
SECTION 8.6) is consummated,  to the registered holders of the Promissory Notes
in the respective principal amounts listed on SCHEDULE 2; the amount of interest
accrued through the date on which a Stock Offering is consummated shall be
inserted on SCHEDULE 2 promptly following such date and shall become a part
thereof and hereof.


                                          5

<PAGE>

    Section 8.  CONDITIONS TO OBLIGATIONS OF THE PURCHASER.  The obligations of
the Purchaser under this Agreement are, at the option of the Purchaser, subject
to the satisfaction at or prior to the Closing of the following conditions:

         8.1  ACCURACY OF REPRESENTATIONS AND WARRANTIES.  All of the
representations and warranties made by the Selling Stockholders in this
Agreement shall be true in all material respects as of the Closing Date with the
same force and effect as though such representations and warranties had been
made as of the Closing Date, and the Representative shall have delivered to the
Purchaser a certificate to such effect dated the Closing Date and signed by its
duly authorized representative.

         8.2  FULFILLMENT OF COVENANTS.  All of the terms, covenants and
conditions of this Agreement to be complied with and performed by the Selling
Stockholders at or before the Closing Date shall have been duly complied with
and performed, and the Representative shall have delivered to the Purchaser a
certificate to such effect dated the Closing Date and signed by its duly
authorized representative.

         8.3  APPROVAL OF SALE.  All authorizations, consents and approvals of
all federal, state and local governmental agencies and authorities required to
be obtained in order to permit consummation of the transactions contemplated by
this Agreement shall have been obtained.

         8.4  CONSENTS OBTAINED.  The Company and the Selling Stockholders
shall have delivered to the Purchaser the written consent or approval of each
person or organization whose consent or approval shall be required in order to
permit them to consummate the transactions contemplated hereby or in order to
avoid any breach or termination of any agreement to which they are a party.

         8.5  NO LITIGATION.  There shall be no litigation pending which has
been brought for the purpose of enjoining any transaction contemplated by this
Agreement or which would have the effect, if successful, of imposing a material
liability upon the Purchaser because of such transaction.

         8.6  CONSUMMATION OF STOCK OFFERING.  The Purchaser shall have
consummated either (i) the underwritten public offering of its common stock (the
"Underwritten Offering"), as contemplated in the Registration Statement on Form
S-2 (Regis. No. 333-09011) as filed with the Securities and Exchange Commission,
as may be amended, on or prior to October 30, 1996, or (ii) a private placement
of its securities prior to December 31, 1996 (the earlier to occur of such
private placement and the Underwritten Offering is referred to herein as a
"Stock Offering").


                                          6

<PAGE>

    Section 9.  TERMINATION; SURVIVAL OF REPRESENTATIONS, WARRANTIES AND
COVENANTS

         9.1  TERMINATION.  Anything contained in this Agreement to the
contrary notwithstanding, this Agreement may be terminated at any time prior to
the Closing Date.

              (a)  by the mutual written consent of the Purchaser and the
Selling Stockholders;

              (b)  by the Purchaser or the Selling Stockholders if the Closing
shall not have occurred on or before December 31, 1996 (or such later date as
may be mutually agreed to by the Purchaser and the Representative); PROVIDED
THAT, the terminating party is not in breach of any of its obligations,
agreements, covenants, representations or warranties pursuant to this Agreement;

              (c)  by the Purchaser (i) in the event of any material breach by
the Selling Stockholders of any of the Selling Stockholders's agreements,
representations, or warranties contained herein and the failure of the Selling
Stockholders to cure such breach within seven days after the date on which
notice from the Purchaser requesting such breach to be cured is deemed delivered
pursuant to SECTION 11.1, or (ii) if a Stock Offering is not consummated on or
prior to December 31, 1996;

              (d)  by the Selling Stockholders in the event of any material
breach by the Purchaser of any of the Purchaser's agreements, representations,
or warranties contained herein and the failure of Purchaser to cure such breach
within seven days after the date on which notice from the Representative
requesting such breach to be cured is deemed delivered pursuant to SECTION 11.1;
or

              (e)  by the Selling Stockholders or by the Purchaser if the
consummation of such transactions would violate any nonappealable final order,
decree or judgment of any court or governmental authority having competent
jurisdiction.

         9.2  NOTICE OF TERMINATION.  Any party desiring to terminate this
Agreement pursuant to SECTION 9.1 hereof shall give written notice of such
termination to the other parties to this Agreement.

         9.3  EFFECT OF TERMINATION.  In the event that this Agreement shall be
terminated pursuant to this SECTION 9, all further obligations of the parties
under this Agreement shall be terminated without further liability of any party
to the other, provided that nothing herein shall relieve any party from
liability for its willful breach of this Agreement.


                                          7

<PAGE>

         9.4 SURVIVAL.  The representations, warranties and covenants of the
parties contained in this Agreement or in any certificate or instrument
delivered pursuant hereto shall survive the Closing hereunder for a period of
one year following the Closing Date.

    Section 10.  PAYMENT OF EXPENSES; FINDER'S FEE

         10.1  EXPENSES.  The parties shall each pay their own expenses
incurred incident to the preparation and carrying out of this Agreement and the
transactions herein contemplated, whether or not such transactions are
consummated.

         10.2  BROKERS; FINDER'S FEE.  Except for American Equities Overseas,
Inc., each of the parties represents that it has dealt with no broker or finder
in connection with any of the transactions contemplated by this Agreement and,
insofar as it knows, no broker or other person is entitled to any commission or
finder's fee in connection with any such transaction.  Each party agrees to
indemnify and hold the other parties harmless against any loss, liability,
damage, cost or expense incurred by reason of any brokerage commission or
finder's fee alleged to be payable because of any act, omission or statement of
the indemnifying party.  Simultaneous to the Closing, the Company shall pay to
American Equities Overseas, Inc. a finder's fee of $15,000 in cash by check made
payable to it in full satisfaction of the Company's obligations to it for
services rendered in connection with the consummation of the transactions
contemplated hereby.

    Section 11.  GENERAL PROVISIONS

         11.1  NOTICES.  All notices given pursuant to this Agreement shall be
in writing and shall be made by hand-delivery, first-class mail (registered or
certified, return receipt requested), telex, telecopier, or overnight air
courier guaranteeing next day delivery to the relevant address specified below.
Except as otherwise provided in this Agreement, each such notice shall be deemed
given: at the time delivered by hand, if personally delivered or mailed postage
prepaid; when answered back, if telexed; when receipt is acknowledged, if
telecopied; and the next business day after timely delivery to the courier, if
sent by overnight air courier guaranteeing next day delivery.

    If to the Purchaser, to:

         AccuMed International, Inc.
         900 North Franklin Street, Suite 401
         Chicago, Illinois  60610

         Attention:  Peter P. Gombrich, Chief Executive Officer

         telecopy number:         312-642-6884
         confirmation number:     312-642-9200


                                          8

<PAGE>

         with a copy to:

         Graham & James LLP
         400 Capitol Mall, Suite 2400
         Sacramento, California 95814

         Attention:  Kevin A. Coyle, Esq.

         telecopy number:         916-441-6700
         confirmation number:     916-558-6700

    If to the Selling Stockholders, to:

         American Equities Overseas, Inc.
         16 Old Bond Street
         London, ENGLAND WIX 3DB

         Attention:  Michel de Beaumont

         telecopy number:  011-44-171-495-3040
         confirmation number: 011-44-171-495-7999

         with a copy to:

         Jack H. Halperin, Esq.
         711 Third Ave., Suite 1505
         New York, NY 10017

         telecopy number:    (212) 378-1299
         confirmation number:(212) 378-1200

or to such other address as such party may indicate by a notice delivered to the
other party hereto.

         11.2  HEADINGS.  The headings of the several sections of this
Agreement are inserted for the convenience of reference only and are not
intended to affect the meaning or interpretation of this Agreement.

         11.3  COUNTERPARTS.  This Agreement may be executed in one or more
counterparts, and when so executed each counterpart shall be deemed to be an
original, and said counterparts together shall constitute one and the same
instrument.


         11.4  ASSIGNMENT.  None of the parties may assign or transfer any
rights or obligations under this Agreement without the prior written consent of
the other parties.

         11.5  WAIVER.  Any party hereto may, by written notice to the others:
(i) waive any of the conditions to its obligations hereunder or extend the time
for the performance of any of the obligations or actions of the others; (ii)
waive any inaccuracies in the representations of the others contained in this
Agreement or


                                          9

<PAGE>

in any documents delivered pursuant to this Agreement; (iii) waive compliance
with any of the covenants of the others contained in this Agreement; or (iv)
waive or modify performance of any of the obligations of the others.  No action
taken pursuant to this Agreement, including without limitation any investigation
by or on behalf of any party, shall be deemed to constitute a waiver by the
party taking such action of compliance with any representation, warranty,
condition or agreement contained herein.  Waiver of the breach of any one or
more provisions of this Agreement shall not be deemed or construed to be a
waiver of other breaches or subsequent breaches of the same provisions.

         11.6  ENTIRE AGREEMENT.  This Agreement, including the schedules and
exhibits hereto, together with the other agreements contemplated herein,
constitutes the entire agreement between the parties pertaining to the subject
matter contained herein and supersedes the Agreement dated July 18, 1996 between
the Purchaser, the Company and the Representative and all other prior and
contemporaneous agreements, representations, and understandings of the parties
relating to the subject matter contained herein and therein.  No supplement,
modification, or amendment of this Agreement shall be binding unless executed in
writing by the party sought to be bound.

         11.7  APPLICABLE LAW.  This Agreement shall be governed by and
construed and interpreted in accordance with the laws of the State of Illinois.

         11.8  SEVERABILITY.  Should any provision of this Agreement be
determined to be invalid, it shall be severed from this Agreement and the
remaining provisions of the Agreement shall remain in full force and effect,
unless the result thereof would be unreasonable in which case the parties hereto
shall negotiate in good faith as to appropriate amendments hereto.

         The parties hereto have caused this Agreement to be duly executed as
of the date first written above.

                             ACCUMED INTERNATIONAL, INC.



                             By: /s/ Peter P. Gombrich
                                 -------------------------------
                                 Peter P. Gombrich
                                 Chief Executive Officer


                                          10

<PAGE>

                             RADCO VENTURES, INC.


                             By: /s/ Kenneth D. Miller
                                 -------------------------------
                                 Kenneth D. Miller
                                 Acting President


                             AMERICAN EQUITIES OVERSEAS, INC., as
                             a representative of the Selling
                             Stockholders listed below


                             By:  /s/ Paul Botta
                                 -------------------------------

                             Name: Paul Botta
                                   -----------------------------

                             Its: Assistant Vice President
                                 -------------------------------


                             THE SELLING STOCKHOLDERS

                             AXEL INVESTMENT CORP.

                             By:  /s/ P.A. Waeder
                                 -------------------------------

                             Name: P.A. Waeder
                                   -----------------------------

                             Its:  President
                                 -------------------------------


                             CLARIDEN BANK

                             By:  /s/ E. Durand - Gasselin
                                 -------------------------------

                             Name:  E. Durand - Gasselin
                                   -----------------------------

                             Its: Portfolio Manager
                                 -------------------------------


                             NAGRASIM S.p.a.

                             By: /s/ Renato Kiikka
                                 -------------------------------

                             Name:  Renato Kiikka
                                   -----------------------------

                             Its:
                                 -------------------------------


                                          11

<PAGE>

                             PULVALCA

                             By: /s/ Pierre Berruyer
                                 -------------------------------

                             Name:Pierre Berruyer
                                   -----------------------------

                             Its:
                                 -------------------------------

                             REPUBLIC NEW YORK SECURITIES f/b/o
                             EMERGE CAPITAL

                             By: /s/ Susan A. Cox
                                 -------------------------------

                             Name: Susan A. Cox
                                   -----------------------------

                             Its: Director
                                 -------------------------------


                             REPUBLIC NEW YORK SECURITIES f/b/o
                             FRANCE FINANCE IV

                             By: /s/ Philipp Brange
                                 -------------------------------

                             Name: Philipp Brange
                                   -----------------------------

                             Its: President
                                 -------------------------------



                             REPUBLIC NEW YORK SECURITIES f/b/o
                             GREEN ACRES ENTERPRISES, INC.

                             By:  /s/ James T. King
                                 -------------------------------

                             Name:  James T. King
                                   -----------------------------

                             Its: Investment Manager
                                 -------------------------------


                             REPUBLIC NEW YORK SECURITIES f/b/o
                             J. WATLING

                             By: /s/ Paul Botta
                                 -------------------------------

                             Name: Paul Botta
                                   -----------------------------

                             Its: Assistant Vice President
                                 -------------------------------


                                          12

<PAGE>

                             REPUBLIC NEW YORK SECURITIES f/b/o
                             KLEBE INVESTMENT CORP.

                             By: /s/ Paul Botta
                                 -------------------------------

                             Name: Paul Botta
                                   -----------------------------

                             Its: Assistant Vice President
                                 -------------------------------


                             REPUBLIC NEW YORK SECURITIES f/b/o
                             MIZEBOURNE INVESTMENT CORP.

                             By: /s/ Paul Botta
                                 -------------------------------

                             Name: Paul Botta
                                   -----------------------------

                             Its: Assistant Vice President
                                 -------------------------------


                             NEWBURGER & BERMAN f/d/o
                             MONTAIGNE FUND

                             By: /s/ Michael Kraland
                                 ------------------------------

                             Name: Michael Kraland
                                   -----------------------------

                             Its: Fund Manager
                                 -------------------------------


                             REPUBLIC NEW YORK SECURITIES f/b/o
                             SAMISA INVESTMENT CORP.

                             By: /s/ Paul Botta
                                 -------------------------------

                             Name: Paul Botta
                                   -----------------------------

                             Its: Assistant Vice President
                                 -------------------------------


                             REPUBLIC NEW YORK SECURITIES f/b/o
                             VITALI MARITIME CORP.

                             By: /s/ Paul Botta
                                 -------------------------------

                             Name: Paul Botta
                                   -----------------------------

                             Its: Assistant Vice President
                                 -------------------------------


                                          13

<PAGE>

                             REPUBLIC NEW YORK SECURITIES f/b/o
                             AMERICAN EQUITIES OVERSEAS

                             By: /s/ Paul Botta
                                 -------------------------------

                             Name: Paul Botta
                                   -----------------------------

                             Its: Assistant Vice President
                                 -------------------------------


                                          14

<PAGE>

                        SCHEDULE 1 TO STOCK PURCHASE AGREEMENT
      Selling Stockholder                         No. of Shares of
    -----------------------                       ----------------
                                                 RADCO Common Stock
                                                 ------------------
Axel Investment Corp.                                48,000

Clariden Bank                                        16,000

Nagrasim S.p.a.                                      16,000

Pulvalca                                              6,400

Republic New York Securities f/b/o                   16,000
Emerge Capital

Republic New York Securities f/b/o                   32,000
Emerge Capital

Republic New York Securities f/b/o
France Finance IV                                    32,000

Republic New York Securities f/b/o
Green Acres Enterprises, Inc.                        32,000

Republic New York Securities f/b/o
J. Watling                                            8,000

Republic New York Securities f/b/o
J. Watling                                            1,600

Republic New York Securities f/b/o
Klebe Investment Corp.                                8,000

Republic New York Securities f/b/o
Klebe Investment Corp.                                1,600

Republic New York Securities f/b/o
Mizebourne Investment Corp.                           8,000

Republic New York Securities f/b/o                    4,800
Mizebourne Investment Corp.

Republic New York Securities f/b/o
Montaigne Fund                                       32,000

Republic New York Securities f/b/o
Samisa Investment Corp.                              24,000

Republic New York Securities f/b/o
Samisa Investment Corp.                              17,600

Republic New York Securities f/b/o
Vitali Maritime Corp.                                16,000

Republic New York Securities f/b/o
Vitali Maritime Corp.                                80,000
                                                 ------------------

Total                                               400,000
                                                 ------------------
                                                 ------------------


                                          15

<PAGE>

                        SCHEDULE 2 TO STOCK PURCHASE AGREEMENT

Selling Stockholder     Principal           Interest to be      Total principal
- -------------------     amount of RADCO     accrued through     and interest
                        Notes     ------    consummation of         --------
                        -----               Underwritten
                                            ------------
                                            Offering
                                            --------

Axel Investment Corp.     $142,500

Clariden Bank              $47,500

Nagrasim S.p.a.            $47,500

Pulvalca                   $19,000

Republic New York          $95,000
Securities f/b/o
Emerge Capital

Republic New York
Securities f/b/o           $47,500
Emerge Capital

Republic New York
Securities f/b/o           $95,000
France Finance IV

Republic New York
Securities f/b/o           $95,000
Green Acres
Enterprises, Inc.

Republic New York
Securities f/b/o J.        $23,750
Watling

Republic New York
Securities f/b/o J.         $4,750
Watling

Republic New York
Securities f/b/o           $23,750
Klebe Investment
Corp.

Republic New York
Securities f/b/o            $4,750
Klebe Investment
Corp.

Republic New York
Securities f/b/o           $23,750
Mizebourne
Investment Corp.

Republic New York
Securities f/b/o           $14,250
Mizebourne
Investment Corp.

Republic New York
Securities f/b/o           $95,000
Montaigne Fund

Republic New York
Securities f/b/o           $71,250
Samisa Investment
Corp.


                                          16

<PAGE>

Republic New York
Securities f/b/o           $52,250
Samisa Investment
Corp.

Republic New York
Securities f/b/o           $47,500
Vitali Maritime
Corp.

Republic New York
Securities f/b/o          $237,500
Vitali Maritime Corp.

Republic New york
Securities f/b/o                $0
American Equities
Overseas
                       -------------------

Total                   $1,187,500
                       -------------------
                       -------------------


                                          17


<PAGE>
                                                                    EXHIBIT 23.2
 
                       CONSENT OF INDEPENDENT ACCOUNTANTS
 
   
    We   consent  to  the  inclusion  or  incorporation  by  reference  in  this
Pre-effective Amendment No.  1 to  the Form S-2  (Regis. No.  333-09011) of  our
report  dated  September  14,  1995,  on  our  audit  of  the  balance  sheet of
Sensititre/Alamar, the Microbiology  Division of AccuMed,  Inc., as of  December
31,  1994, and the net  sales, cost of sales and  selling expenses for the eight
months ended December 31, 1994, and the years ended April 30, 1994 and 1993;  of
our report, which includes an explanatory paragraph related to substantial doubt
about  the  ability of  AccuMed,  Inc. to  continue  as a  going  concern, dated
September 29, 1995, on  our audit of  the balance sheet of  AccuMed, Inc. as  of
December  31, 1994, and for the period from February 7, 1994 (inception) through
December 31, 1994, both appearing in the registration statement on Form S-4 (SEC
File No. 33-99680)  of Alamar Biosciences,  Inc. filed with  the Securities  and
Exchange  Commission pursuant to  the Securities Act of  1933 as incorporated by
reference in the Current Report on Form 8-K dated December 29, 1995; and of  our
report,  which includes  an explanatory  paragraph related  to substantial doubt
about the ability of  Alamar Biosciences, Inc. to  continue as a going  concern,
dated  November 19, 1995,  on our audits  of the financial  statements of Alamar
Biosciences, Inc. as of  September 30, 1995  and 1994, and  for the years  ended
September 30, 1995, 1994 and 1993, which report is included in the Annual Report
on  Form 10-KSB for  the year ended September  30, 1995. We  also consent to the
reference to our firm under the caption "Experts."
    
 
                                          /s/ COOPERS & LYBRAND L.L.P.
 
   
Sacramento, CA
August 28, 1996
    

<PAGE>
                                                                    EXHIBIT 23.3
 
                       CONSENT OF INDEPENDENT ACCOUNTANTS
 
   
    We consent to the incorporation by reference in this Pre-effective Amendment
No.  1 to the registration statement on Form S-2 (SEC File No. 333-09011) of our
report dated December 8,  1995, on our  audit of the  balance sheets of  AccuMed
International  Limited as  of December  31, 1994, April  30, 1994  and 1993, and
related statements  of  operations and  cashflows  for the  eight  months  ended
December 31, 1994, and the years ended April 30, 1994 and 1993, appearing in the
registration   statement  on  Form  S-4  (SEC   File  No.  33-99680)  of  Alamar
Biosciences, Inc. filed with the Securities and Exchange Commission pursuant  to
the Securities Act of 1933 as incorporated by reference in the current Report on
Form 8-K dated December 29, 1995.
    
 
/s/ COOPERS & LYBRAND
 
   
Croydon
United Kingdom
August 28, 1996
    

<PAGE>
                                                                    EXHIBIT 23.4
                         INDEPENDENT AUDITORS' CONSENT
 
The Board of Directors
AccuMed International, Inc.
 
We  consent  to the  use  of our  report  dated April  5,  1996 relating  to the
consolidated balance sheet of AccuMed  International, Inc. and subsidiary as  of
December  31,  1995  and  the  related  consolidated  statements  of operations,
stockholders' equity and cash  flows for three months  ended December 31,  1995,
included  in  this  Prospectus and  incorporated  herein by  reference  from the
Company's transition report on Form 10-KSB  for the three months ended  December
31,  1995,  and  to  the  reference to  our  firm  under  the  heading "Selected
Consolidated Financial Data" and "Experts" in the prospectus.
 
/s/ KPMG Peat Marwick LLP
 
   
Chicago, Illinois
August 28, 1996
    

<PAGE>
                                                                    EXHIBIT 23.5
                         INDEPENDENT AUDITORS' CONSENT
 
The Board of Directors
Oncometrics Imaging Corp.
 
We consent to the use of our report included herein and to reference to our firm
under the heading "Experts" in the prospectus.
 
/s/ KPMG
Chartered Accountants
 
   
Vancouver, British Columbia
August 28, 1996
    

<PAGE>


                                CONSENT OF EXPERTS

   We consent to the reference to our firm under the heading "Experts" in the 
Prospectus constituting part of the Pre-Effective Amendment No. 1 to the 
Registration Statement on Form S-2 (Regis. No. 333-09011) and amendments 
thereto.

   We further consent to the incorporation by reference of this consent 
pursuant to Rule 439(b) under the Securities Act of 1933, as amended (the 
"Securities Act"), pursuant to any subsequent registration statement for the 
same offering that may be filed pursuant to Rule 462(b) under the Securities 
Act.


                                         /s/ Bradley J. Hulbert
                                         ---------------------------------
                                         By: Bradley J. Hulbert

10 S. Wacker Drive
Chicago, Illinois 60606
August 28, 1996


<PAGE>


                                CONSENT OF EXPERTS

   We consent to the reference to our firm under the heading "Experts" in the 
Prospectus constituting part of the Pre-Effective Amendment No. 1 to the 
Registration Statement on Form S-2 (Regis. No. 333-09011) and amendments 
thereto.

   We further consent to the incorporation by reference of this consent 
pursuant to Rule 439(b) under the Securities Act of 1933, as amended (the 
"Securities Act"), pursuant to any subsequent registration statement for the 
same offering that may be filed pursuant to Rule 462(b) under the Securities 
Act.


                                                /s/ James Heslin
                                         ----------------------------------
                                         Townsend and Townsend and Crew LLP

379 Lytton Avenue
Palo Alto, California 94301
August 28, 1996



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