BOSTON BIOMEDICA INC
424B4, 1996-10-31
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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PROSPECTUS
- - ----------

                                1,600,000 SHARES

                                     [LOGO]

                             BOSTON BIOMEDICA, INC.
                                  COMMON STOCK


                                  -----------


    All of the  1,600,000  shares of Common Stock (the "Common  Stock")  offered
hereby are being sold by Boston Biomedica, Inc. (the "Company").
   
    Prior to this Offering, there has been no public market for the Common Stock
of the Company. See "Underwriting" for information relating to the determination
of the initial  public  offering  price.  The Common Stock has been approved for
quotation on the Nasdaq National Market under the symbol "BBII."
    

                                   ----------


SEE "RISK FACTORS"  BEGINNING ON PAGE 6 FOR A DISCUSSION OF CERTAIN FACTORS THAT
SHOULD BE  CONSIDERED  BY  PROSPECTIVE  PURCHASERS  OF THE COMMON STOCK  OFFERED
HEREBY.

                                  -----------


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


================================================================================

   
                                                UNDERWRITING
                                 PRICE TO      DISCOUNTS AND    PROCEEDS TO
                                  PUBLIC       COMMISSIONS(1)    COMPANY(2)
- - --------------------------------------------------------------------------------
Per Share                         $ 8.50               $ .595       $ 7.905
- - --------------------------------------------------------------------------------
Total(3)                      $  13,600,000        $  952,000    $  12,648,000
================================================================================
    

(1)  Excludes  the value of warrants to be issued to the  Underwriters  and a 1%
     non-accountable  expense allowance  payable to the  Underwriters,  of which
     $40,000  has been paid to date.  The Company  has agreed to  indemnify  the
     Underwriters against certain liabilities,  including  liabilities under the
     Securities Act of 1933, as amended. See "Underwriting."

   
(2)  Before deducting expenses payable by the Company estimated to be $792,000.


(3)  The Company has granted the Underwriters an option,  exercisable  within 30
     days of the date  hereof,  to purchase up to 240,000  additional  shares of
     Common  Stock at the  Price  to  Public  less  Underwriting  Discounts  and
     Commissions to cover over-allotments, if any. If all such additional shares
     are  purchased,  the total  Price to  Public,  Underwriting  Discounts  and
     Commissions  and  Proceeds  to  Company  will be $ 15,640,000,  $ 1,094,800
     and $ 14,545,200, respectively. See "Underwriting."


                                   ----------

    The shares of Common  Stock are offered by the  Underwriters  named  herein,
subject to receipt and  acceptance  by them and subject to their right to reject
any order in whole or in part. It is expected that delivery of the  certificates
representing  such shares will be made against payment therefor at the office of
Oscar Gruss & Son  Incorporated  in New York,  New York on or about  November 5,
1996.
    

OSCAR GRUSS & SON INCORPORATED                               KAUFMAN BROS., L.P.

   
                THE DATE OF THIS PROSPECTUS IS OCTOBER 31, 1996.
    



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.






    Description of photograph:

    Under  the  caption  "Total  Quality  System,"  there  is a  collage  of the
Company's  products which are a part of its Total Quality  System.  In the upper
left corner is a photograph of a TQS Qualification  Panel,  proceeding clockwise
to the upper right  corner is a  photograph  of an Accurun 1(R) vial and pipette
superimposed over a typical  Levey-Jennings  daily quality control chart. In the
lower right corner is a photograph of a lab  technician  operating  equipment in
one of the Company's  laboratories,  and finally, in the lower left corner, is a
photograph  of  Anti-HIV  1  Western  Blots for seven  different  Company  Panel
Products.


    The BBI logo is a trademark  of the  Company.  Accurun  1(R) is a registered
trademark of the Company. Accurun(tm) is a trademark of the Company.

    IN CONNECTION WITH THIS OFFERING,  THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT
TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE COMMON STOCK AT
A LEVEL  ABOVE THAT WHICH  MIGHT  OTHERWISE  PREVAIL  IN THE OPEN  MARKET.  SUCH
STABILIZING, IF COMMENCED, MAY BE DISCONTINUED AT ANY TIME.







    TQS Logo

                                             o TARGETED TO THE EMERGING
                                               END-USER MARKET FOR
     TOTAL                                     INFECTIOUS DISEASE TEST
    QUALITY                                    KIT QUALITY CONTROL
    SYSTEM                                   o USER-FRIENDLY PRODUCTS
                                               FOR MONITORING
                                               LABORATORY PROFICIENCY,
                                               LOT ACCEPTANCE,
                                               TROUBLESHOOTING AND TRAINING
                                             o DESIGNED TO EVALUATE THE
                                               KEY ELEMENTS IN
                                               THE TESTING PROCESS:
                        TEST KIT, EQUIPMENT AND PERSONNEL
                           o ESSENTIAL PRODUCTS IN AN
                        OVERALL QUALITY ASSURANCE PROGRAM




                                                 QUALITY CONTROL
                                                   PRODUCTS FOR
                                             INFECTIOUS DISEASE TESTS



o SEROCONVERSION
  PANELS, PERFORMANCE
  PANELS AND SENSITIVITY PANELS
  FOR THE EVALUATION OF
  INFECTIOUS DISEASE
  TEST KITS                                      Photograph of four of the
o USED BY TEST KIT                      Company's Quality Control Panel Products
  MANUFACTURERS AND
  REGULATORS THROUGHOUT
  THE WORLD
o DEVELOPED FROM AN
  EXTENSIVE INVENTORY
  OF HUMAN BLOOD SPECIMENS
o CONTRIBUTING TO THE
  IMPROVED SENSITIVITY
  OF INFECTIOUS DISEASE
  TESTS WORLDWIDE





    Inside Front Cover

    Title at top of page reads:  "Serving Our  Customer's  Needs  Throughout the
Entire Product Life Cycle."

    Description  of   Photograph:   Photograph  is  comprised  of  a  pie  chart
superimposed  over photographs of the Company's  products and services.  The pie
chart has four sections and eight  subsections.  The four sections  refer to the
four stages in the test kit life-cycle and are captioned:  "R&D,"  "Regulatory,"
"Production" and "Marketing." Each subsection has a corresponding  photograph of
a Company product or service. The eight subsections are captioned:  "Performance
Panels,"   "Seroconversion   Panels,"  "Highly  Characterized   Specimen  Bank,"
"Clinical  Trials,"  "Characterized  Disease  State  Sera,"  "Basematrix,"  "Run
Controls" and "OEM and Custom Panels."

    Underneath the photograph are the words: "Your Partner in Infectious Disease
Quality Control" and the Company's logo is to the immediate left.




                               PROSPECTUS SUMMARY


    The following is qualified in its entirety by the more detailed  information
(including the financial  statements and notes thereto)  appearing  elsewhere in
this Prospectus.  Unless otherwise indicated, all information in this Prospectus
(i) assumes no exercise of the Underwriters' option to purchase from the Company
up to 240,000  additional  shares of Common Stock to cover  over-allotments,  if
any,  (ii) gives  effect to a 1-for-2  reverse  stock split with  respect to the
Common Stock effected in September  1996,  (iii) gives effect to certain changes
to the Company's  Articles of Organization  effected in September 1996, and (iv)
gives effect to the  termination of certain  redemption  provisions  relating to
117,647  shares of Common Stock upon  completion  of this  Offering.  Unless the
context  indicates  otherwise,  all  references  to the  "Company" are to Boston
Biomedica,  Inc.  and its two  wholly-owned  subsidiaries,  BTRL  Contracts  and
Services,  Inc. ("BTRL"), and BBI -- North American Clinical Laboratories,  Inc.
("BBI -- NACL").  For a discussion of certain  matters that should be considered
by purchasers of the Common Stock offered  hereby,  see "Risk  Factors." For the
definition of certain technical and scientific terms, see "Glossary."


                                   THE COMPANY

   
    Boston  Biomedica,  Inc. is a  worldwide  provider  of  proprietary  quality
control  products for use with in vitro  diagnostic  test kits ("test kits") for
the detection,  analysis and monitoring of infectious diseases,  including AIDS,
Hepatitis  and Lyme  Disease.  These  products are used to develop test kits, to
permit the monitoring of laboratory equipment and personnel,  and to help ensure
the  accuracy of test  results.  The  Company's  products are derived from human
plasma and serum using proprietary manufacturing processes. The Company believes
its Quality Control Panel products are viewed as the current  industry  standard
for the  independent  assessment of the  performance  of HIV and Hepatitis  test
kits. The Company also manufactures  diagnostic test kit components and provides
specialty laboratory services, including clinical trials.
    

    To  date,  the  Company  has  sold  its  products   primarily  to  test  kit
manufacturers and regulatory agencies, but it has recently begun selling Quality
Control  Products  directly to the emerging  end-user market for quality control
products for  infectious  disease test kits.  In late 1994 the Company  received
United States Food and Drug  Administration  ("FDA") clearance for Accurun 1(R),
its first Quality  Control  Product  designed  specifically  for end-users,  and
subsequently has introduced 24 additional  Accurun(tm) Quality Control Products.
In July 1996,  the  Company  introduced  its Total  Quality  System  ("TQS"),  a
marketing platform that combines Accurun(tm) with other Quality Control Products
to provide test kit  end-users  with the products  needed in an overall  quality
assurance  program.  TQS products  allow  end-users to evaluate  each of the key
elements  of the  testing  process:  the  test  kit,  laboratory  equipment  and
laboratory personnel.


   
    The Company's  customers include Abbott  Diagnostics,  Boehringer  Mannheim,
Chiron,  Fujirebio,  Hoffman LaRoche,  Ortho Diagnostics (Johnson & Johnson) and
Sanofi  Diagnostics;  regulatory  agencies  such as the United  States FDA;  and
end-users of diagnostic test kits,  such as blood banks,  hospitals and clinical
laboratories.  The  Company's  products  are sold to its  customers  pursuant to
purchase orders for discrete purchases and not pursuant to long-term contracts.
    



    The increased threat of infectious  diseases has created a large and growing
market for  infectious  disease test kits.  Venture  Planning  Group,  a medical
products research firm, estimates that the worldwide infectious disease test kit
market was  approximately  $2.7 billion in 1995 and will grow to $5.0 billion by
2000. The related market for quality  control  products for in vitro  diagnostic
testing for infectious and  non-infectious  disease totaled  approximately  $600
million in 1994,  according to the Genesis Report Dx, a medical products survey.
The Company believes that quality control  products for infectious  disease test
kits currently  represent less than five percent of the overall  quality control
market, primarily as a result of the limited use of such products by end-users.

    The  Company  believes  that the market for  quality  control  products  for
infectious  disease  test kits  will  continue  to  expand,  particularly  among
end-users,  primarily  as  a  result  of  several  key  factors:  (i)  increased
regulatory  scrutiny  due to public  concern  about the  dangers  of  infectious
diseases such as AIDS and  Hepatitis;  (ii) growing  recognition of the value of
using quality  control  products to ensure the greatest  possible  safety of the
blood supply,  to achieve the earliest possible  diagnosis of infection,  and to
minimize the  occurrence of false negative  results;  (iii) the discovery of new
infectious diseases and the development of new treatments for diseases requiring
periodic  monitoring,  such as viral load testing for HIV, Hepatitis B and C and
other  diseases;  and  (iv)  the  emergence  of  new  testing  technologies  and
equipment.


                                       3


    The Company offers three product groups in infectious  disease  diagnostics:
Quality  Control  Panels,  Accurun(tm)  Run Controls and Diagnostic  Components.
These products are used throughout the entire test kit life cycle,  from initial
research and development,  through the regulatory  approval process and test kit
production,  to  training,  troubleshooting  and routine use by  end-users.  The
Company's  Quality  Control  Panels,  which combine human blood  specimens  with
comprehensive  quantitative  data useful for comparative  analysis,  help ensure
that test kits detect the correct analyte (specificity),  detect it the same way
every  time   (reproducibility),   and  detect  it  at  the  appropriate  levels
(sensitivity).  The Company's  Accurun(tm) Run Controls enable end-users of test
kits to confirm the validity of results by monitoring test performance,  thereby
minimizing  false  negative  test  results and  improving  error  detection.  In
addition, the Company provides Diagnostic Components, which are custom processed
human plasma and serum products, to test kit manufacturers.

    The Company's  specialty clinical  laboratory  services include both routine
and  sophisticated  infectious  disease testing in microbiology,  immunology and
molecular biology.  The Company seeks to focus its specialty laboratory services
in advanced areas of infectious disease testing,  and provides contract research
and clinical trials for domestic and foreign test kit manufacturers.

    The  Company's  strategy  is to  leverage  its  scientific  capabilities  in
microbiology,  immunology,  virology, and molecular biology to (i) capitalize on
the emerging  end-user  market,  (ii) develop new products and  services,  (iii)
enhance  technical  leadership,   (iv)  capitalize  on  complementary   business
operations, and (v) pursue strategic acquisitions and alliances.

    The Company  believes that it has several  competitive  advantages that will
help it implement its strategy:

    o an  inventory  of  approximately  50,000  distinct  human blood  specimens
      accumulated  since 1986  through its  worldwide  sources of  blood-supply,
      which enable the Company to quickly respond to market trends;

    o the ability to offer specialty  laboratory  services and conduct  clinical
      trials,  which helps it to maintain  contact and enhance  credibility with
      test kit manufacturers and regulatory authorities,  and allows the Company
      to remain at the forefront of market trends and customer needs;

    o proprietary  manufacturing know-how resulting from ten years of experience
      working with leading  worldwide  manufacturers in the development of their
      infectious disease test kits; and

    o its  reputation  as an authority in  infectious  disease  quality  control
      products among test kit manufacturers and regulatory agencies.

    The Company, a Massachusetts corporation, was organized in 1978, but did not
commence significant  operations until 1986. The Company's principal offices are
located at 375 West Street, West Bridgewater, MA 02379, and its telephone number
is (508) 580-1900.

                                  THE OFFERING


Common Stock Offered                    1,600,000 shares(1)

Common Stock to be Outstanding
  after the Offering                    4,290,064 shares(1)(2)


   
Use of Proceeds                          Repayment  of   indebtedness,   capital
                                         expenditures,   investment  in  BioSeq,
                                         Inc.     and     general      corporate
                                         purposes,including  working capital and
                                         potential  acquisitions.  See  "Use  of
                                         Proceeds."
    

Nasdaq National
  Market Symbol                        BBII



- - -----------
(1) Does not  include up to 240,000  shares of Common  Stock that may be sold by
    the Company pursuant to the Underwriters' over-allotment option.
    See "Underwriting."


(2) Does not include  1,161,057 shares of Common Stock issuable upon exercise of
    outstanding  options and warrants and 14,333 shares of Common Stock issuable
    upon  conversion  of  an  outstanding  subordinated  convertible  note.  See
    "Capitalization"  and Notes 6, 10 and 11 of Notes to Consolidated  Financial
    Statements.


                                       4



                    SUMMARY CONSOLIDATED FINANCIAL DATA
                   (In thousands, except per share data)


<TABLE>
<CAPTION>
                                                                            YEAR ENDED DECEMBER 31,        SIX MONTHS ENDED JUNE 30,
                                                                            -----------------------        -------------------------
                                                                          1993(1)    1994      1995            1995          1996
                                                                          -------    ----      ----            ----          ----
<S>                                                                       <C>        <C>       <C>         <C>              <C>

STATEMENT OF OPERATIONS DATA:
  Product sales                                                            $3,942    $ 5,982   $ 6,622     $  3,024     $  3,946
  Service revenue                                                           5,215      4,741     5,649        2,540        2,982
    Total revenue                                                           9,157     10,723    12,271        5,564        6,928

  Income from operations                                                      312        405       508          104          307
  Net income (loss)                                                           142         97       103          (36)          83
  Net income (loss) per share(2)(3)                                        $ 0.06    $  0.04   $  0.04     $  (0.01)    $   0.03
  Weighted average common and common equivalent shares
   outstanding(2)(3)                                                        2,438      2,587     3,151        2,598        3,253
</TABLE>




<TABLE>
<CAPTION>

                                                                                                                  JUNE 30, 1996
                                                                                                                  -------------
                                                                                                                         PRO FORMA
                                                                                                             ACTUAL   AS ADJUSTED(4)
                                                                                                            ------   --------------
<S>                                                                                                         <C>       <C>
   
BALANCE SHEET DATA:
  Working capital                                                                                           $ 4,497       $ 12,823
  Total assets                                                                                               10,047         18,616
  Long term debt, less current maturities                                                                     2,798          --
  Redeemable common stock                                                                                       899          --
  Total stockholders' equity                                                                                  3,332         16,087
    

</TABLE>




- - ----------
(1)  On June  30,  1993,  the  Company  exercised  its  option  to  pre-pay  the
     acquisition  note issued in connection  with the 1992 purchase of BTRL at a
     discount  from the  balance  due,  resulting  in an  extraordinary  gain of
     $50,000, net of taxes of $33,000. The 1993 net income per share before such
     extraordinary gain was $0.04.

(2)  The effect of the common stock  equivalents  on net income per common share
     has been excluded from the calculation for 1993 and 1994 and the six months
     ended June 30, 1995 as its inclusion was antidilutive.

   
(3)  Pro forma supplementary  earnings per share for the year ended December 31,
     1995  and  the  six  months  ended  June  30,  1996  were  $.09  and  $.05,
     respectively,  based upon an  assumed  weighted  average  common and common
     equivalent shares outstanding of 3,626,391 and 3,727,557,  respectively. In
     accordance with APB Opinion 15, pro forma supplementary  earnings per share
     is presented as if the Company sold on January 1, 1995,  474,914  shares of
     Common Stock, representing the number of shares of Common Stock required to
     be sold at the assumed  initial public offering price of $8.50 per share in
     order for the Company to repay the average indebtedness  outstanding during
     1995 as if the  Offering  had  occurred  on January  1,  1995.  See "Use of
     Proceeds" and Note 12 of Notes to Consolidated Financial Statements.


(4)  Adjusted to reflect: (i) application of the estimated net proceeds from the
     sale of 1,600,000  shares of Common Stock offered by the Company  hereby at
     the  initial  public  offering  price of $8.50 per share,  after  deducting
     underwriting  discounts and commissions and estimated offering expenses, to
     repay  outstanding  indeptedness  at  June  30, 1996, to pay the  first two
     installments of the BioSeq  investment and for working capital (see "Use of
     Proceeds") and (ii) the  termination of redemption  provisions  relating to
     117,647 shares of Common Stock upon completion of this Offering.
    

                                       5


                                  RISK FACTORS

    An investment in the shares of Common Stock offered  hereby  involves a high
degree of risk. In addition to the other  information  in this  Prospectus,  the
following  factors should be considered  carefully in evaluating the Company and
its business before purchasing the shares of Common Stock offered hereby.

UNDEVELOPED END-USER MARKET FOR QUALITY CONTROL PRODUCTS FOR INFECTIOUS
DISEASE TEST KITS

    The Company intends to focus its product development and sales and marketing
efforts on quality  control  products for end-users of  infectious  disease test
kits. Currently,  most quality control products for infectious disease test kits
are sold to test kit  manufacturers  and  regulators.  End-users  of  infectious
disease test kits are currently  using quality  control  products only to a very
limited extent.  See "Business -- Industry  Overview." The Company's strategy is
based primarily upon significant  growth in sales of quality control products to
the end-user market.  See "Business -- Strategy." There can be no assurance that
end-users of  infectious  disease test kits will  increase  their use of quality
control  products,  or that the Company  will be able to  increase  its sales of
quality control products to such end-users.  Clearance or approval by the United
States Food and Drug Administration (the "FDA") will be necessary before quality
control  products  may be sold  for  clinical  laboratory  use  rather  than for
research  purposes  only.  See  "--  Stringent  Government  Regulation."  If the
end-user market for quality control products does not develop, or if the Company
is unable to increase  its sales to this market,  the  Company's  future  growth
could be materially and adversely affected.

COMPETITION

    In sales of both its products and specialty laboratory services, the Company
experiences   substantial   competition  and  the  threat  of  competition  from
established  and potential  competitors,  most of which have greater  financial,
manufacturing  and  marketing  resources  than  the  Company.   Competition  for
customers is intense and depends  principally on the ability to provide products
of the quality and in the quantity required by customers, as well as the ability
to provide  sophisticated  specialty laboratory services, at competitive prices.
The Company  currently  competes  against  independent  reference  laboratories,
integrated plasma collection and processing centers and manufacturers of quality
controls and other Diagnostic  Components.  In addition, the Company understands
that a leading  manufacturer  of quality  control  products  for  non-infectious
diseases recently entered the quality control market for infectious disease test
kits. There can be no assurance that other such manufacturers or other companies
will not enter this  market.  The  entrance of any of these  companies  into the
quality  control market for  infectious  disease test kits could have a material
adverse effect on the Company,  particularly its ability to achieve its strategy
to capitalize on the end-user market for quality control products for infectious
disease test kits. In addition,  certain of the  Company's  products are derived
from donors with rare antibody characteristics.  Competition for blood specimens
from such donors may  increase,  which may increase  the cost of obtaining  such
specimens.  There can be no assurance that such increased  competition  will not
adversely  affect the  Company.  See "--  Difficulty  in  Obtaining  Certain Raw
Materials" and "Business -- Competition."

ABILITY TO MANAGE GROWTH

    The  Company's  future  success will depend in part on its ability to manage
growth as it increases its production capacity and broadens  distribution of its
products.  To compete  effectively and manage future growth, if any, the Company
will be required to continue to implement and improve its operational, financial
and management  information systems,  procedures and controls on a timely basis,
and to  expand,  train,  motivate  and  manage  its  workforce.  There can be no
assurance that the Company's personnel, systems, procedures and controls will be
adequate to support the Company's  future  operations.  The failure to implement
new and improved existing  operational,  financial and management  systems or to
expand, train, motivate or manage employees could have a material adverse effect
on the Company's business,  operating results and financial condition. There can
be no assurance that the Company will continue to grow or, if it does,  that the
Company will manage the growth successfully.


                                       6


FLUCTUATIONS IN QUARTERLY RESULTS OF OPERATIONS

    The  Company's   results  of  operations  have  been  subject  to  quarterly
fluctuations due to a variety of factors, including customer purchasing patterns
and  seasonal  demand  for  laboratory  testing  services.  In  particular,  the
Company's  sales of its  Quality  Control  Products  and  Diagnostic  Components
typically  have been  highest  in the  fourth  quarter  and  lowest in the first
quarter of each fiscal year.  For example,  total revenue for the fourth quarter
ended  December 31, 1994 and 1995 were $3.0  million and $3.8  million  compared
with total  revenue for the first  quarter ended March 31, 1995 and 1996 of $2.7
million and $3.1  million.  The Company  believes  that its customers may expend
end-of-year  budget  surpluses  in  the  fourth  quarter,  thereby  causing  the
Company's  fourth  quarter  product  sales to be higher at the  expense of first
quarter product sales. In addition,  demand for laboratory  services tends to be
somewhat  higher in the third and fourth  quarters of the fiscal year due to the
seasonal  nature of Lyme Disease  testing,  the Company's  highest  volume test.
Moreover,  the Company's  margins for its different  products and services vary,
with Quality Control Products  generally having the highest margins and Contract
Research the lowest.  Therefore,  the Company's  results may vary from period to
period  as a  result  of the mix of  products  and  services  and the mix  among
products. As a result,  quarterly results of operations may not be indicative of
future  results of  operations.  Also,  variations  in the  Company's  quarterly
results of operations may affect the market price of the Common Stock.  See " --
Volatility of Price of Common Stock" and  "Management's  Discussion and Analysis
of Financial Condition and Results of Operations."

RISK OF ACQUISITIONS


    The  Company  intends to pursue  strategic  acquisitions  to expand its core
product line, strengthen its base in medical science and technology,  and secure
new sources of blood supply.  The Company is subject to various risks associated
with an acquisition strategy, including the risk that the Company will be unable
to identify and attract  suitable  acquisition  candidates  or to integrate  and
manage  any  acquired  business.   The  Company  will  compete  for  acquisition
candidates  with  companies  which  have  significantly  greater  financial  and
management  resources than the Company.  Acquisitions  could place a significant
burden on the Company's  management and operating  personnel.  Implementing  the
Company's  expansion  strategy may also require  significant  capital resources.
Capital  is  needed  not only  for  acquisitions,  but  also  for the  effective
integration, operation and expansion of such businesses. The Company may need to
raise capital  through the issuance of long-term or short-term  indebtedness  or
the issuance of its  securities in private or public  transactions,  which could
result  in  dilution  of  existing  equity  positions,  increased  interest  and
amortization expense or decreased income to fund future expansion.  There can be
no assurance that acceptable financing for future acquisitions will be available
or that the  integration  of  future  acquisitions  and  expansion  of  existing
business can be achieved. See "-- Ability to Manage Growth."


DIFFICULTY IN OBTAINING CERTAIN RAW MATERIALS

    The Company  manufactures its products from human plasma and serum which the
Company  obtains from nonprofit and commercial  blood centers,  primarily in the
United States,  but also from similar sources  throughout the world.  Certain of
the Company's products, including its Seroconversion and Performance Panels, are
comprised of unique and rare plasma specimens  obtained from individuals  during
the short  period of time when the disease  markers of  particular  diseases are
converting  from negative to positive.  See "Business -- Products." As a result,
the  quantity of any such panel is limited,  so the Company  must  replace  such
panels as they sell out with another panel comprised of specimens equally unique
and rare. Competition to obtain such specimens may increase,  which may increase
the cost of obtaining such products.  There can be no assurance that the Company
will continue to be successful in obtaining a steady and adequate  supply of the
unique and rare  specimens  of plasma  and serum  necessary  for  certain of its
products. The inability to continue to obtain such specimens, or any significant
delays in obtaining such specimens,  would have a material adverse effect on the
Company. See "-- Competition."

DEPENDENCE ON KEY PERSONNEL

    The Company's  success depends in large part upon its ability to attract and
retain  highly  qualified  scientific  and  management  personnel.  The  Company
competes  for such  individuals  with other  companies,  academic  institutions,
government entities and other organizations. There can be no


                                       7

assurance  that the Company will be successful in hiring or retaining  requisite
personnel. The failure of the Company to recruit and retain qualified scientific
and management  personnel  could have a material  adverse effect on the Company.
None of the  Company's key  management or scientific  personnel is subject to an
employment  agreement with the Company. The loss of the services of any such key
personnel,  including  Richard  T.  Schumacher,  President  and Chief  Executive
Officer of the Company, could have a material adverse effect on the Company. The
Company  maintains  key  person  life  insurance  on  certain  of its  officers,
including Mr. Schumacher, on whose life the Company has $4,750,000 of insurance,
$2,000,000 of which has been pledged to the Company's lender.  See "Management's
Discussion  and Analysis of Financial  Condition  and Results of  Operations  --
Liquidity and Capital  Resources,"  "Business -- Competition" and "Management --
Directors and Executive Officers."

DEPENDENCE ON KEY CUSTOMERS

   
    The  Company's  three  largest  product  customers  accounted for an average
aggregate of approximately 20% of the Company's  revenues in 1993, 1994 and 1995
and the six months ended June 30, 1995 and 1996, although the customers were not
identical in each period.  In addition,  the majority of the Company's  revenues
are  based  upon  purchase   orders.   None  of  the  Company's   customers  are
contractually  committed to make future product purchases from the Company.  The
loss of any  major  customer  or a  material  reduction  in a  major  customer's
purchases would have a material adverse effect upon the Company.


    A single U.S.  government services contract accounted for approximately 7.6%
and 6.8% of the  Company's  revenues  in 1995 and the six months  ended June 30,
1996. This contract is due to expire in February 1997. The Company has responded
to a Request for Proposals by the United States  government  for a new four year
contract to replace this contract.  There can be no assurance that the Company's
response  to the  Request for  Proposals  will be accepted by the United  States
government.  Failure to receive the new contract  would have a material  adverse
effect on the Company. See "Business -- Services."
    
STRINGENT GOVERNMENT REGULATION


    The manufacture  and  distribution of medical  devices,  including  products
manufactured  by the Company that are intended for in vitro  diagnostic use, are
subject to extensive  government  regulation  in the United  States and in other
countries.  In the United States,  the Food, Drug, and Cosmetic Act (the "FDCA")
prohibits the  marketing of in vitro  diagnostic  products  until they have been
cleared or approved by the FDA, a process that is time-consuming,  expensive and
uncertain.  Once clearance or approval is obtained,  the FDA requires additional
clearances  or  approvals  for product  changes that could affect the safety and
effectiveness of the device,  including, for example, new indications for use or
changes  in the  design  or  manufacturing  process.  Additional  clearances  or
approvals  may also be  required  for  changes  in  claims  relating  to uses of
products. The Company's Accurun Run Controls,  when marketed for diagnostic use,
have been classified by the FDA as medical devices. The Company has received FDA
clearance  to  market  its  Accurun  1(R)  line  for  diagnostic  purposes.   An
application  for clearance for  diagnostic  use for one  additional  Accurun(tm)
product  has  been  submitted  by  the  Company  to the  FDA,  and  the  Company
anticipates  that  applications  for  approximately  16  additional  Accurun(tm)
products will be prepared and submitted to the FDA by the end of 1997. There can
be no assurance that the Company will obtain regulatory  clearances or approvals
on a timely basis, if at all, for future products,  changes in existing products
or  changes in claims  relating  to uses of  products.  Delays in  obtaining  or
failure to obtain  requisite FDA  clearances or approvals  could have a material
adverse effect on the Company.


    All of the Company's  Quality Control Products with the exception of Accurun
1(R) are marketed  "for  research use only," which do not require FDA  premarket
clearance or approval of the product,  and not marketed for diagnostic purposes,
which do require FDA premarket clearance or approval. The Company's labeling for
these products limits their use to research. It is possible,  however, that some
purchasers of these  products may use them for diagnostic  purposes  despite the
Company's intended use. In these circumstances,  the FDA could allege that these
products  should have been cleared or approved by the FDA prior to marketing and
initiate  enforcement  action  against the Company,  which could have a material
adverse effect on the Company.  Failure to obtain,  or delays in obtaining,  FDA
clearances  or  approval  would  adversely  affect  the  Company's  strategy  of
capitalizing on the end-user market.


                                       8


    The Company  believes that its Quality  Control  Panels are not regulated by
the FDA because  they are not  intended  for  diagnostic  purposes.  The Company
believes  that its  Diagnostic  Components,  which  are  components  of in vitro
diagnostic products, may be subject to certain regulatory requirements under the
FDCA and other laws administered by the FDA, but do not require that the Company
obtain a premarket  approval or clearance.  There can be no assurance,  however,
that  the  FDA  would  agree  or  that  the  FDA  will  not  adopt  a  different
interpretation  of the FDCA or other  laws it  administers,  which  could have a
material adverse effect on the Company.

    In addition,  both before and after clearance or approval,  medical devices,
such as Accurun  1(R),  are  subject to certain  export and import  requirements
under the FDCA.

    The  Company  is also  subject to strict  FDA good  manufacturing  practices
("GMP") regulations governing testing,  control and documentation,  and to other
postmarketing  restrictions  with respect to the  manufacture  of the  Company's
medical  device  products.  Ongoing  compliance  with GMP and  other  applicable
regulatory  requirements  is  monitored  through  periodic  inspections  by  the
regulatory  authorities.   Failure  to  comply  with  GMP  or  other  regulatory
requirements  can  result,  among other  consequences,  in the failure to obtain
premarket clearances or approvals,  withdrawal of clearances or approvals, total
or partial  suspension of product  distribution,  injunctions,  civil penalties,
recall or seizures of products,  and criminal  prosecution,  each of which would
have a material adverse effect on the Company.

    Laws and regulations  affecting the Company's products are in effect in many
of the countries, states and other jurisdictions in which the Company markets or
intends to market its products.  There can be no assurance that the Company will
be able to obtain any required  regulatory  clearances  or approvals on a timely
basis,  or at all.  Delays in receipt of or failure to obtain such clearances or
approvals,  or the  failure  to comply  with  regulatory  requirements  in these
countries,  states or other jurisdictions,  could have a material adverse effect
on the Company's business,  financial  condition and results of operations.  See
"Business -- Government Regulation."

    The  Company  is also  subject to other  national,  state and local laws and
regulations,  including those relating to the use and disposal of  biohazardous,
radioactive  and other hazardous  substances and wastes.  Failure to comply with
such laws and regulations  could have a material adverse effect on the Company's
business,  financial  condition  and results of  operations.  See  "Business  --
Government Regulation."

FOREIGN RESTRICTIONS ON IMPORTATION OF BLOOD DERIVATIVES

    Sales  outside  the  United  States  in  1993,  1994  and  1995  represented
approximately  15%, 21% and 25%,  respectively,  of the  Company's  revenues for
those  years,  and 27% in each of the six months  ended June 30,  1995 and 1996.
Foreign  sales are  primarily  to Western  Europe and Japan.  Concern over blood
safety has led to  movements  in a number of  European  and other  countries  to
restrict the importation of blood and blood derivatives,  including  antibodies.
Such  restrictions  continue  to be debated and there can be no  assurance  that
additional  restrictions  will not be imposed in the future.  If  imposed,  such
restrictions could have a material adverse effect on the Company's business.

RISK OF TECHNOLOGICAL CHANGE

    The  infectious  disease  test kit  industry is  characterized  by rapid and
significant  technological  change and  changes in customer  requirements.  As a
result,  the Company's success will be dependent upon its ability to enhance its
existing products and to develop or acquire and introduce in a timely manner new
products that take advantage of  technological  advances and respond to customer
requirements.  There can be no assurance  that the Company will be successful in
developing  and  marketing  such new products or  enhancements  to the Company's
existing  products  on a timely  basis or that  such  products  will  adequately
address the changing needs of the marketplace.  Furthermore, rapid technological
development by the Company or others may result in products or services becoming
obsolete  or  noncompetitive  before the  Company  recovers  its  investment  in
research, development and commercialization.


                                       9


RISK OF BROAD MANAGEMENT DISCRETION IN APPLICATION OF PROCEEDS


    A significant  portion of the estimated net proceeds from this Offering will
be  allocated  to working  capital and  general  corporate  purposes,  including
potential acquisitions.  Accordingly,  the Company will have broad discretion as
to the  application  of the net  proceeds  and  may  allocate  portions  of such
proceeds to uses which the Company's  stockholders  may not deem  desirable.  In
October 1996, the Company  entered into a License  Agreement and Preferred Stock
Purchase Agreement ("Purchase Agreement") with BioSeq, Inc. ("BioSeq"), an early
stage  biotechnology  company that is  developing a technology  for  sequencing,
synthesizing  and  characterizing  nucleic acids and proteins.  See "Business --
Strategic  Alliances." Under the Purchase  Agreement,  the Company has agreed to
purchase  approximately  19% of the  outstanding  capital stock of BioSeq for an
aggregate of $1,482,500, to be paid in three installments.  The Company has paid
the  first  installment  of  $210,000  and will pay the  second  installment  of
$522,500 upon  completion of the Offering.  The Company intends to use a portion
of the proceeds of this Offering to fund the second  installment and $210,000 of
such proceeds to repay amounts drawn on the Company's  revolving  line of credit
to fund the first  installment.  The Company  must make the  remaining  $750,000
installment if BioSeq  attains  certain  technical  milestones by July 31, 1997.
There can be no assurance as to the commercial  viability of BioSeq's technology
or that the Company will not lose its entire investment in BioSeq.  Additionally
there can be no assurance that the Company's use of any of the proceeds from the
Offering will yield any return. See "Use of Proceeds."


PROTECTION OF INTELLECTUAL PROPERTY AND PROPRIETARY TECHNOLOGY

    None of the Company's Quality Control Products or Diagnostic Components have
been patented and the Company does not intend to seek patent protection for such
products. The Company's ability to compete effectively with other companies will
depend,  in part,  on its  ability to  maintain  the  proprietary  nature of its
technologies  and products and operate  without  infringing  the rights of third
parties.  The Company  relies  primarily on a  combination  of trade secrets and
non-disclosure   and   confidentiality   agreements,   and  in  certain  limited
circumstances,  patents,  to establish and protect its proprietary rights in its
technology  and  products.  There  can be no  assurance  that  others  will  not
independently  develop or otherwise  acquire the same,  similar or more advanced
trade secrets and know-how.

    The Company has two United States  patents and,  jointly with the University
of North  Carolina at Chapel  Hill  ("UNC"),  has filed  three  series of United
States and foreign  patent  applications  relating to compounds,  pharmaceutical
compositions  and  therapeutic  methods in connection  with the  Company's  drug
discovery  program at the  University  of North  Carolina  at Chapel  Hill.  See
"Business -- Services," and " -- Strategic Alliances." There can be no assurance
that patent applications will result in issued patents, that issued patents will
provide  any  competitive  advantage  or that  patents  will not be  challenged,
circumvented or invalidated.

    Third parties may be issued patents to, or may otherwise  acquire the rights
to, technology  necessary or potentially  useful to the Company.  The success of
the  Company  is  dependent  in part upon its not  infringing  patents  or other
intellectual  property  rights  of third  parties.  Litigation  relating  to the
infringement  of the  patents or other  intellectual  property  rights of others
could result in substantial costs to the Company.  Litigation which could result
in  substantial  costs to the  Company  may also be  necessary  to  enforce  the
Company's intellectual property rights or to determine the scope and validity of
the  proprietary  rights of  others.  Any such  substantial  costs  would have a
material adverse effect on the Company.

UNCERTAINTY RELATED TO HEALTHCARE REFORM; NO ASSURANCE OF ADEQUATE REIMBURSEMENT

    Political,  economic and regulatory influences are subjecting the healthcare
industry in the United States to fundamental  change.  Although to date Congress
has failed to pass  comprehensive  health care reform  legislation,  the Company
anticipates  that  Congress and state  legislatures  will continue to review and
assess alternative healthcare delivery and payment systems and may in the future
propose and adopt legislation  effecting  fundamental  changes in the healthcare
delivery system.  Legislative  debate is expected to continue in the future.  In
addition,  the private sector has been changing the healthcare  industry as well
through  consolidations  and alternatives in healthcare  delivery  systems.  The
Company  cannot  predict what impact the adoption of any federal or state health
care reform measures or future private sector reform may have on its industry or
business.



                                       10


    In both domestic and foreign  markets,  sales by the Company's  customers of
products and services  that  incorporate  or affect the demand for the Company's
products  may  depend  in  part  on  the  availability  of  reimbursement   from
third-party payors such as government health administration authorities, private
health insurers and other  organizations.  Third-party  payors are  increasingly
challenging the price and cost-  effectiveness of medical products and services.
There can be no assurance  that pricing  pressures  experienced by the Company's
customers will not adversely affect the Company because of a determination  that
its  products  are not cost  effective  or  because  of  inadequate  third-party
reimbursement  levels to such  customers.  In addition,  where the payor for the
Company's  specialty  laboratory services is the patient rather than third-party
payors, there is a greater risk of non-payment. See "Management's Discussion and
Analysis  of  Financial  Condition  and  Results  of  Operations  --  Results of
Operations."

RISK OF HAZARDOUS WASTE AND PRODUCT LIABILITY; ABSENCE OF INSURANCE

    The  Company's   manufacturing  processes  involve  the  controlled  use  of
biohazardous  materials and chemicals.  The risk of accidental  contamination or
injury from these  materials  cannot be completely  eliminated.  In the event of
such an accident,  the Company could be held liable for any damages that result,
and any such  liability  could exceed the resources of the Company.  The Company
may  incur  substantial  costs to  maintain  safety  in the use of  biohazardous
materials and to comply with  environmental  regulations as the Company  further
develops its manufacturing capacity. See "Business -- Government Regulation."

    Further,  the  Company's  business  exposes it to  liability  risks that are
inherent in the  testing,  manufacturing  and  marketing  of its  products.  The
Company does not currently have product liability  insurance.  Product liability
claims could expose the Company to substantial  liabilities and expenses,  which
could materially and adversely affect the Company.

RISKS ASSOCIATED WITH EXPORT SALES


    The  Company  generated  significant  sales  outside  the United  States and
anticipates  that  foreign  sales will  continue  to account  for a  significant
percentage  of the Company's net  revenues.  The  Company's  foreign  operations
accounted for approximately 15%, 21% and 25% of the Company's total revenues for
the  years  ended  December  31,  1993,   1994  and  1995,   respectively,   and
approximately  27% in each of the six months  ended June 30, 1995 and 1996,  and
36%, 38% and 47% of the Company's product sales for the years ended December 31,
1993,  1994 and 1995,  respectively,  and 50% and 48% for each of the six months
ended  June 30,  1995 and  1996.  The  Company  therefore  is  subject  to risks
associated with foreign sales,  including  United States and foreign  regulatory
requirements   and  policy   changes,   political   and  economic   instability,
difficulties  in  accounts  receivable  collection,   difficulties  in  managing
distributors or representatives and seasonality of sales. Although the Company's
sales have been  denominated in United States  dollars,  the value of the United
States dollar in relation to foreign  currencies may also  adversely  affect the
Company's sales to foreign customers. To the extent that the Company expands its
international  operations or changes its pricing  practices to denominate prices
in  foreign  currencies,  the  Company  will be exposed  to  increased  risks of
currency  fluctuation.  See  "Management's  Discussion and Analysis of Financial
Condition  and  Results  of  Operations"  and Note 5 of  Notes  to  Consolidated
Financial Statements.


POSSIBLE ADVERSE EFFECT OF CONTROL BY EXISTING STOCKHOLDERS


    Upon  consummation of this Offering,  Richard T.  Schumacher,  President and
Chief Executive  Officer,  his relatives and the existing officers and directors
of the Company  collectively will have voting control over  approximately 39% of
the outstanding shares of Common Stock. Accordingly, these stockholders,  should
they choose to act in concert,  will be in a position to exercise a  significant
degree of control over the Company, and to significantly  influence  stockholder
votes on the  election of the  Company's  directors,  increasing  the  Company's
authorized  capital  stock,  mergers,  and sales of the  Company's  assets.  See
"Principal Stockholders."


POSSIBLE ADVERSE EFFECT OF CERTAIN ANTI-TAKEOVER PROVISIONS

    Certain  provisions  of the  Company's  Amended  and  Restated  Articles  of
Organization  and Restated  Bylaws could have the effect of discouraging a third
party from  pursuing a  non-negotiated  takeover of the  Company and  preventing
certain  changes in control.  These  provisions  include a  classified  Board of
Directors,  a fair price provision,  advance notice to the Board of Directors of
stockholder proposals and


                                       11


stockholder  nominees for the Board of Directors,  limitations on the ability of
stockholders to remove directors and call stockholders  meetings,  the provision
that  vacancies  on the  Board of  Directors  be  filled  by a  majority  of the
remaining  directors  and the  ability  of the Board to issue,  without  further
stockholder approval,  preferred stock with rights and privileges which could be
senior to the Common  Stock.  The Company also is subject to Chapter 110F of the
Massachusetts  General Laws which,  subject to certain  exceptions,  prohibits a
Massachusetts  corporation  from  engaging  in any of a broad  range of business
combinations  with any  "interested  stockholder"  for a period  of three  years
following the date that such stockholder became an interested stockholder. These
provisions  could  discourage  a third  party from  pursuing  a takeover  of the
Company  at a price  considered  attractive  by many  stockholders,  since  such
provisions could have the effect of preventing or delaying a potential  acquiror
from  acquiring  control  of  the  Company  and  its  Board  of  Directors.  See
"Description   of  Capital   Stock  --  Preferred   Stock,"  "--   Massachusetts
Anti-Takeover and Related Statutes" and " -- Certain Provisions of the Company's
Articles of Organization and By-laws."

NO ASSURANCE OF PUBLIC MARKET; POSSIBLE VOLATILITY OF PRICE OF COMMON
STOCK

    Prior to this  Offering,  there has been no public  trading  market  for the
Common Stock.  There can be no assurance  that a regular  trading market for the
Common Stock will develop after this Offering or that, if developed,  it will be
sustained.  The initial public offering price of the Common Stock was determined
by negotiations  between the Company and Representatives of the Underwriters and
may not be  indicative  of the price at which the Common  Stock will trade after
completion of this Offering.  For factors  considered in determining the initial
public offering price,  see  "Underwriting."  After completion of this Offering,
the  market  price  of  the  Common  Stock  could  be  subject  to   significant
fluctuations in response to various factors and events,  including the liquidity
of the  market  for the  shares of Common  Stock,  variations  in the  Company's
operating  results,  changes  in  earnings  estimates  by  securities  analysts,
publicity regarding the Company, the infectious disease test kit industry or the
healthcare  industry  generally,  new statutes or  regulations or changes in the
interpretation  of existing  statutes or  regulations  affecting the  healthcare
industry in general or the  infectious  disease test kit industry in particular.
In addition,  the stock market in recent years has  experienced  broad price and
volume fluctuations that often have been unrelated to the operating  performance
of particular companies. These market fluctuations also may adversely affect the
market price of the shares of Common Stock.


LACK OF UNDERWRITING HISTORY

    Kaufman Bros.,  L.P. became  registered as a broker-dealer  in July 1995 and
has participated in a limited number of public  offerings as an underwriter.  As
part of its due diligence  function,  the  Underwriters  make such  inquiries of
management as they deem  appropriate,  review the accuracy of the Prospectus and
establish the initial public  offering  price for the Common Stock.  Prospective
purchasers of Common Stock offered hereby should consider the limited experience
of Kaufman  Bros.,  L.P. in evaluating  an  investment in the Common Stock.  See
"Underwriting."


DILUTION


   
    Purchasers of shares in the Offering will suffer immediate dilution of $4.77
in net tangible book value per share. See "Dilution" and "Underwriting."
    


SHARES ELIGIBLE FOR FUTURE SALE


    Sales of substantial  amounts of Common Stock in the public  market,  or the
perception  that such sales may occur,  could  adversely  affect the  prevailing
market price of the Common Stock and the ability of the Company to raise capital
through a public  offering of its equity  securities.  Upon  completion  of this
Offering,  the Company will have  4,290,064  shares of Common Stock  outstanding
(4,530,064  shares if the  Underwriters'  overallotment  option is  exercised in
full). Of those shares,  the 1,600,000  shares sold in this Offering  (1,840,000
shares if the Underwriters'  overallotment  option is exercised in full) will be
freely tradeable without restriction (except as to affiliates of the Company) or
further  registration  under the Securities Act. All of the Company's  directors
and executive officers and certain other stockholders, holding in the



                                       12



aggregate  2,555,244  shares of Common Stock,  have agreed not to offer to sell,
sell or otherwise  dispose of any shares of Common Stock prior to the expiration
of 180 days from the date of this  Prospectus.  Oscar  Gruss & Son  Incorporated
may, in its sole discretion and at any time without prior notice, release all or
any  portion of the  shares of Common  Stock  subject to the lockup  agreements.
Beginning  91 days  after the date of this  Prospectus,  6,475  shares of Common
Stock will be  eligible  for sale in the  public  market  without  registration,
subject to certain  volume and other  limitations,  pursuant to Rule 144 or Rule
701 under the Securities Act of 1933, as amended (the  "Securities  Act") and an
additional  122,571 shares will be eligible for sale without such  restrictions.
Following the expiration of the 180-day lockup period,  an additional  1,643,197
shares of Common  Stock will be eligible for sale in the public  market  without
registration,  subject to certain volume and other limitations, pursuant to Rule
144 or Rule 701 under the Securities  Act and an additional  734,425 shares will
be eligible for sale without such  restrictions.  The remaining shares of Common
Stock held by existing stockholders,  including shares issuable upon exercise of
options,  will become  eligible  for sale under Rule 144 or otherwise at various
times  thereafter.  All shares of Common Stock  outstanding  on the date of this
Prospectus will be eligible for sale to certain qualified  institutional  buyers
in accordance  with Rule 144A under the Securities  Act. The Company  intends to
register  under  the  Securities  Act,  shortly  after the  consummation  of the
Offering,  shares of Common  Stock  issuable  upon  exercise of  employee  stock
options,  including  934,387  shares  issuable  upon  exercise  of such  options
outstanding on the date of this  Prospectus.  Two of the Company's  stockholders
and the holder of a warrant to purchase Common Stock have the right to cause the
Company to register  their shares under the  Securities Act and to include their
shares in certain  future  registrations  of securities  effected by the Company
under the  Securities  Act.  An  aggregate  of 627,650  shares of Common  Stock,
including  226,670  shares of Common Stock issuable upon exercise of outstanding
warrants,  are  covered  by  such  registration  rights.  If  such  holders,  by
exercising  their  registration  rights,  cause a large  number  of shares to be
registered and sold in the public market,  such sales may have an adverse effect
on the market price of the Common  Stock.  If the Company is required to include
in a Company-initiated  registration shares held by such holders pursuant to the
exercise of their piggyback  registration rights, such sales may have an adverse
effect  on  the  Company's  ability  to  raise  needed  capital.   See  "Certain
Transactions," "Principal Stockholders" and "Shares Eligible for Future Sale."



                                       13


                                 USE OF PROCEEDS


   
    The  net  proceeds  to be  received  by the  Company  from  the  sale of the
1,600,000  shares of Common Stock offered hereby are estimated to be $11,856,000
($13,732,800 if the  Underwriters  over-allotment  option is exercised in full),
after deducting  underwriting  discounts and commissions and estimated  offering
expenses payable by the Company.
    

    The Company expects to use approximately $4.1 million of the net proceeds to
repay  outstanding  indebtedness,  as described  below, and  approximately  $1.0
million for capital  expenditures to expand its  manufacturing  capacity in West
Bridgewater, of which approximately $500,000 will be spent on building expansion
and  approximately  $500,000 will be spent on equipment.  The Company intends to
use $522,500 of the net proceeds of this Offering to fund the second installment
of its  investment in BioSeq.  The Company  anticipates  using the remaining net
proceeds for general corporate  purposes,  including working capital, as well as
for potential  acquisitions  and  alliances.  See "Risk Factors -- Risk of Broad
Management  Discretion in  Application  of Proceeds," and "Business -- Strategic
Alliances."


    At October 23, 1996, the  approximately  $4.1 million of  indebtedness to be
repaid from the proceeds of this  Offering  consists of (i)  approximately  $2.4
million of  indebtedness  under a secured  revolving line of credit due June 30,
1998 that bears  interest at a rate equal to the prime rate plus 0.5% per annum;
(ii) a mortgage note in the principal  amount of  approximately  $678,225 on the
West Bridgewater  property that bears interest at a fixed rate of 8.3% per annum
until December 2000 and  thereafter  bears interest at a rate equal to the prime
rate plus 1% per annum,  and which is due December  2002;  (iii) a term note, in
the principal amount of $424,500,  that bears interest at 9.01% per annum and is
due in October 1998; (iv) a term note, in the principal amount of $133,333, that
bears  interest at the prime rate plus 1% per annum and is due October 1999; (v)
a term note, in the principal amount of $315,686,  that bears interest at a rate
equal to the prime plus 1% per annum and is due August  2000;  (vi) a term note,
in the principal  amount of $85,000,  that bears interest at a rate of 8.22% per
annum and is due December  2000;  and (vii) various  other notes that  aggregate
$77,459 due from June 1997 to August 2000. The proceeds from borrowings incurred
within  the past  year  were  used for  working  capital,  to  acquire  the West
Bridgewater  property,  to purchase capital  equipment and to make the Company's
$210,000 initial investment in BioSeq. See "Management's Discussion and Analysis
of Financial  Condition  and Results of  Operations"  and Note 6 of Notes to the
Consolidated Financial Statements.


    With respect to potential  acquisitions  and  alliances,  in addition to the
investment  in BioSeq,  the  Company  may use a portion of the net  proceeds  to
acquire blood donor centers and other businesses,  products or technologies that
are complementary to the Company's  current business,  although it currently has
no commitments for such acquisitions or alliances. See "Business -- Strategy."


    The specific  timing and amount of funds  required for specific  uses by the
Company  cannot be precisely  determined  at this time.  Pending such uses,  the
Company  intends to invest in short-term,  investment  grade,  interest  bearing
obligations.

                                 DIVIDEND POLICY

    The Company has never  declared or paid cash  dividends on its capital stock
and does  not plan to pay any cash  dividends  in the  foreseeable  future.  The
Company's  current  policy is to retain all of its  earnings  to finance  future
growth. Any future determination to pay cash dividends will be at the discretion
of the Board of Directors  and will be dependent  upon the  Company's  financial
condition, operating results, capital requirements,  general business conditions
and such other factors as the Board of Directors deems relevant.  The Company is
subject to financial and operating  covenants,  including a prohibition  against
the  payment  of  cash  dividends,  under  its  bank  financing  agreement.  See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations -- Liquidity and Capital Resources."


                                       14


                                 CAPITALIZATION


   
    The  following  table  sets  forth  as of  June  30,  1996  (i)  the  actual
capitalization of the Company,  (ii) the pro forma capitalization of the Company
after giving effect to the termination of certain redemption provisions relating
to 117,647  shares of Common Stock,  and (iii) as adjusted to give effect to the
sale of 1,600,000  shares of Common Stock  offered by the Company  hereby at the
initial public offering price of $8.50 per share,  after deducting  underwriting
discounts  and  commissions  and  estimated  offering  expenses  payable  by the
Company.  This  table  should  be  read in  conjunction  with  the  Consolidated
Financial  Statements  and related  notes  thereto  appearing  elsewhere in this
Prospectus.
    



<TABLE>
<CAPTION>

                                                                      JUNE 30, 1996
                                                                      -------------
                                                                                   PRO FORMA
                                                             ACTUAL   PRO FORMA   AS ADJUSTED
                                                             ------   ---------   -----------
                                                            (IN THOUSANDS, EXCEPT SHARE DATA)
<S>                                                         <C>       <C>         <C>
   
Current maturities of long term debt                         $  490    $  490       $  --
                                                             ======    ======       =======
Long-term debt, less current maturities:
   Line of credit                                             1,398     1,398          --
   Bank term debt                                               719       719          --
   Mortgage term debt                                           620       620          --
   Other notes payable                                           61        61          --
                                                              -----     -----       -------
                                                              2,798     2,798          --
                                                              -----     -----       -------
Redeemable  common stock,  $.01 par value;  authorized
  issued and  outstanding  117,647, and none pro forma
  and pro forma  as adjusted                                    899      --            --
                                                              -----     -----       -------
Stockholders' equity:
   Common  stock,  $.01 par  value;  authorized  15,000,000  shares;  issued and
     outstanding 2,572,417 actual, 2,690,064 pro forma and
     4,290,064 pro forma as adjusted(1)                          26        27            43
   Preferred Stock                                              --        --            -- 
   Additional paid-in capital                                 2,717     3,615        15,455
   Retained earnings                                            589       589           589
                                                              -----     -----       -------
     Total stockholders' equity                               3,332     4,231        16,087
                                                              -----     -----       -------
     Total capitalization                                    $7,029    $7,029       $16,087
                                                             ======    ======       =======
    


</TABLE>


- - ----------
(1)  Excludes the following at June 30, 1996: (i) 934,387 shares of Common Stock
     issuable  pursuant  to the  exercise  of  stock  options  outstanding  at a
     weighted  average  exercise  price of $3.15 per share,  of which options to
     purchase  653,684  shares were then  exercisable,  (ii)  226,670  shares of
     Common Stock issuable pursuant to the exercise of warrants outstanding at a
     weighted  average exercise price of $2.50 per share, all of which were then
     exercisable,  and  (iii)  14,333  shares  of  Common  Stock  issuable  upon
     conversion of the subordinated  convertible note at $1.50 per share.  Since
     June  30,  1996,  no  stock  options  were  exercised,  granted  or  became
     exercisable. See "MANAGEMENT -- Stock Plans."


                                       15




                                    DILUTION


   
    At June 30, 1996, the Company had a net tangible book value of $4,137,943 or
$1.54 per share of Common Stock.  "Net tangible book value per share" represents
the  tangible  book  value of the  Company  (total  tangible  assets  less total
liabilities)  divided by the number of shares of Common Stock  outstanding (on a
pro  forma  basis  to give  effect  to the  termination  of  certain  redemption
provisions  relating to 117,647  shares of Common  Stock).  Without  taking into
account any changes in such net tangible  book value as of June 30, 1996,  other
than to give effect to the sale by the Company of the 1,600,000 shares of Common
Stock offered  hereby at the initial  public  offering  price of $8.50 and after
deducting the   underwriting  discounts  and  commissions and estimated offering
expenses  payable by the Company,  the pro forma net tangible  book value of the
Company at June 30, 1996 would have been  $15,993,943,  or $3.73 per share. This
represents  an immediate  increase in the net  tangible  book value per share of
$2.19 to existing  stockholders  and an  immediate  dilution of the net tangible
book value per share of $4.77 to persons  purchasing  the Common  Stock  offered
hereby (the "New  Investors").  The following table  illustrates  this per share
dilution:



Initial public offering price per share                                   $ 8.50
Net tangible book value per share before the Offering     $1.54
Increase per share attributable to New Investors           2.19
                                                           ----
Pro forma as adjusted net tangible book value
  per share after the  Offering                                             3.73
                                                                            ----
Dilution per share to New  Investors                                       $4.77
                                                                           =====

    The  following  table sets forth on a pro forma basis,  as of June 30, 1996,
the total number of shares purchased from the Company after giving effect to the
sale of the 1,600,000 shares of Common Stock offered by the Company hereby,  the
total  consideration paid to the Company and the average price per share paid by
existing  stockholders and by New Investors at the initial public offering price
of $8.50 per share:
    



<TABLE>
<CAPTION>
   

                                       SHARES PURCHASED      TOTAL CONSIDERATION
                                       ----------------      -------------------
                                                                                     AVERAGE
                                                                                      PRICE
                                       NUMBER     PERCENT     AMOUNT      PERCENT   PER SHARE
                                       ------     -------     ------      -------   ---------
<S>                                   <C>         <C>       <C>           <C>       <C>
Existing Stockholders                 2,690,064     62.7%   $ 3,835,373     22.0%     $1.43
New Investors                         1,600,000     37.3%    13,600,000     78.0%     $8.50
                                      ---------     ----     ----------     ----
  Total                               4,290,064    100.0%   $17,435,373    100.0%
                                      =========    =====    ===========    =====
</TABLE>
    


    The above information assumes (i) no exercise of the Underwriters'  warrants
and (ii) no exercise of any other  outstanding  options and warrants  after June
30, 1996. As of June 30, 1996,  there were outstanding  options,  warrants and a
subordinated  convertible  note to purchase an aggregate of 1,175,390  shares of
Common Stock at exercise  prices  ranging  from $0.25 to $8.50 per share.  Since
June 30, 1996, no stock options were exercised,  granted or became  exercisable.
To the extent these  options and warrants are  exercised,  there will be further
dilution  to  New  Investors.   See   "Management  --  Stock  Plans,"   "Certain
Transactions" and Note 10 of Notes to Consolidated Financial Statements.


                                       16



                      SELECTED CONSOLIDATED FINANCIAL DATA

    The following table contains certain selected consolidated financial data of
the Company and is qualified in its entirety by the more  detailed  Consolidated
Financial  Statements and Notes thereto  included  elsewhere in this Prospectus.
The statement of operations  data for the fiscal years 1993,  1994 and 1995, and
the balance sheet data as of December 31, 1994 and 1995,  have been derived from
the Consolidated  Financial Statements of the Company which have been audited by
Coopers & Lybrand L.L.P., independent accountants, and which appear elsewhere in
this Prospectus. The balance sheet data as of December 31, 1993 are derived from
consolidated  financial  statements  that have been audited by Coopers & Lybrand
L.L.P.  The  statement  of  operations  data of the Company for the fiscal years
ending  December 31, 1991 and 1992 and the balance sheet data as of December 31,
1991 and 1992 have been derived from  consolidated  financial  statements of the
Company which have been audited by other  independent  public  accountants.  The
unaudited  consolidated  financial  data as of June  30,  1996,  and for the six
months ended June 30, 1996 and 1995,  have been  prepared on a basis  consistent
with the  audited  consolidated  financial  statements  and,  in the  opinion of
management,  include  all  adjustments  (consisting  only  of  normal  recurring
adjustments)  necessary to present fairly the financial condition and results of
operations for the periods presented.  The results for the six months ended June
30, 1996, are not necessarily indicative of the results that may be expected for
the year ending December 31, 1996. This data should be read in conjunction  with
the   Consolidated   Financial   Statements   and  related   Notes  thereto  and
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations" appearing elsewhere herein.


<TABLE>
<CAPTION>
                                                                                                          SIX MONTHS ENDED
                                                                                                          ----------------
                                                               YEAR ENDED DECEMBER 31,                   JUNE 30,   JUNE 30,
                                                               -----------------------                   --------   --------
                                                  1991    1992(1)   1993(2)(3)       1994      1995       1995       1996
                                                  ----    -------   ----------       ----      ----       ----       ----
                                                        (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                              <C>      <C>        <C>            <C>       <C>        <C>        <C>

CONSOLIDATED STATEMENT OF OPERATIONS DATA:
REVENUE:
   Product sales                                 $2,146    $2,955       $3,942      $ 5,982   $ 6,622    $3,024     $ 3,946
   Services                                         264     1,680        5,215        4,741     5,649     2,540       2,982
                                                    ---     -----        -----        -----     -----     -----       -----
     Total revenue                                2,410     4,635        9,157       10,723    12,271     5,564       6,928
                                                  -----     -----        -----       ------    ------     -----       -----
COSTS AND EXPENSES:
   Cost of product sales                          1,172     1,638        2,088        3,194     3,564     1,646       2,007
   Cost of services                                 191     1,443        3,965        3,416     4,168     1,960       2,250
   Research and development                         104       222          279          469       375       159         362
   Selling and marketing                            372       353          894        1,192     1,340       638         915
   General and administrative                       436       745        1,619        2,047     2,316     1,057       1,088
                                                    ---       ---        -----        -----     -----     -----       -----
     Total operating costs and expenses           2,275     4,401        8,845       10,318    11,763     5,460       6,622
                                                  -----     -----        -----       ------    ------     -----       -----
     Income from operations                         135       234          312          405       508       104         306
Interest expense, net                               101       113          179          244       336       164         168
                                                    ---       ---          ---          ---       ---       ---         ---
   Income (loss) before income taxes and
     extraordinary item                              34       121          133          161       172       (60)        138
Provision for income taxes                           (5)      (45)         (41)         (64)      (69)       24         (55)
                                                  -----     -----       ------      -------    ------    ------      ------
   Income (loss) before extraordinary item           29        76           92           97       103       (36)         83
Extraordinary item-gain on elimination of debt,
  net of income taxes                                --        --           50           --        --        --          --
                                                  -----     -----       ------       ------    ------    ------      ------
  Net income (loss)                              $   29    $   76       $  142      $    97   $   103    $  (36)    $    83
                                                 ======    ======       ======      =======   =======    ======     =======
Net income (loss) per share(4)(5)                $ 0.01    $ 0.04       $ 0.06      $  0.04   $  0.04    $(0.01)    $  0.03
Weighted average common and common equivalent
  shares outstanding(4)(5)                        1,948     2,160        2,438        2,587     3,151     2,598      3,253
</TABLE>

                                       17


<TABLE>
<CAPTION>

                                                                         DECEMBER 31,                       JUNE 30, 1996
                                                                         ------------                       -------------
                                                           1991     1992     1993     1994     1995     ACTUAL   PRO FORMA(7)
                                                           ----     ----     ----     ----     ----     ------   ------------
                                                            (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                       <C>      <C>      <C>      <C>      <C>      <C>       <C>
CONSOLIDATED BALANCE SHEET DATA:
Working capital(6)                                        $1,698   $2,457   $3,612   $4,686   $4,829   $ 4,497      $ 4,497
Total assets                                               2,624    4,828    6,870    8,076    9,928    10,047       10,047
Long term debt, less current maturities(6)                   993    1,760    2,381    3,180    4,216     2,798        2,798
Redeemable common stock                                     --       --       --       --       --         899        --
Total stockholders' equity                                   993    1,837    2,762    3,041    3,187     3,332        4,231
Dividends --                                                --       --       --       --       --         --         --      


</TABLE>

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

(1) Effective July 1, 1992, the Company acquired through its BTRL subsidiary the
    net assets of a division of Cambridge Biotech Corporation for $762,000 which
    increased 1992 revenues by $1,450,000.

(2) On  June  30,  1993,  the  Company  exercised  its  option  to  pre-pay  the
    acquisition  note  in  connection  with  the  1992  purchase  of  BTRL  at a
    substantial  discount  from the balance due,  resulting in an  extraordinary
    gain of $50,000 net taxes of $33,000.  The 1993 net income per share  before
    such extraordinary gain was $0.04.

(3) Effective  January 1, 1993,  the  Company  acquired  the net assets of North
    American  Laboratory  Group Ltd.,  Inc. for $425,000,  which  increased 1993
    revenues by $2,019,000.

(4) The effect of the common stock  equivalents on net income per share has been
    excluded from the calculation for years ended December 31, 1991 through 1994
    and the six months ended June 30, 1995 as its inclusion was antidilutive.


(5) Pro forma  supplementary  earnings per share for the year ended December 31,
    1995  and  the  six  months   ended  June  30,  1996  were  $.09  and  $.05,
    respectively,  based  upon an  assumed  weighted  average  common and common
    equivalent shares outstanding of 3,626,391 and 3,727,557,  respectively.  In
    accordance with APB Opinion 15, pro forma  supplementary  earnings per share
    is presented as if the Company  sold on January 1, 1995,  474,914  shares of
    Common Stock,  representing the number of shares of Common Stock required to
    be sold at the assumed  initial public  offering price of $8.50 per share in
    order for the Company to repay the average  indebtedness  outstanding during
    1995 as if the  Offering  had  occurred  on  January  1,  1995.  See "Use of
    Proceeds" and Note 12 of Notes to Consolidated Financial Statements.


(6) The Company's  demand line of credit with  outstanding  amounts of $880,000,
    $1,091,000  and  $1,895,000  as  of  December  31,  1991,   1992  and  1993,
    respectively,  has been  presented as part of long-term  debt (and  excluded
    from current  liabilities in calculating  working  capital) for 1991 through
    1993 to be consistent with its  reclassification  to long-term debt in 1994,
    1995 and 1996 due to a modification of its maturity date.

(7) Adjusted to reflect the  reclassification  of  Redeemable  Common Stock into
    117,647  shares of Common Stock upon  completion of this  Offering,  thereby
    terminating the redemption provisions.



                                       18


                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

    This Prospectus contains forward-looking  statements which involve risks and
uncertainties.  The Company's actual results may differ  significantly  from the
results discussed in the  forward-looking  statements.  Factors that might cause
such a  difference  include,  but are not limited to,  those  discussed in "Risk
Factors."

    The following discussion and analysis should be read in conjunction with the
Company's  Consolidated  Financial  Statements  and the Notes thereto  appearing
elsewhere in this Prospectus.

OVERVIEW

    The Company  generates revenue from products and services provided to the in
vitro diagnostic infectious disease industry.  Products consist of three groups:
Quality  Control  Panels,  Accurun(tm)  Run Controls and Diagnostic  Components.
Services consist of Specialty Clinical  Laboratory  Testing,  Contract Research,
Clinical Trials and Drug Screening.  In the three full years since the Company's
acquisition of BTRL and BBI-NACL, the Company has experienced a shift in revenue
mix towards increased product sales, as product revenue as a percentage of total
revenue  increased  from  43.1% in 1993 to 54.0% in 1995,  with a  corresponding
decrease in the percentage of total revenue provided by services.

    The Company's  gross profit margin  increased from 33.9% in 1993 to 37.0% in
1995  principally  as a result of the  increased  percentage  of  higher  margin
product  revenues.  Within  products,  the Company's  Quality  Control  Products
(Accurun(tm)  Run Controls and Quality  Control Panels) have higher margins than
the Company's Diagnostic  Components.  Within services,  Contract Research gross
margins  are lower than  other  services.  However,  such  contracts  enable the
Company  to  maintain  certain  scientific  staff and  capability  that it might
otherwise not be able to afford.  The Company intends to continue to concentrate
on the growth in sales of its Quality Control Products.

    Historically,  the  Company's  results of  operations  have been  subject to
quarterly  fluctuations  due  to  a  variety  of  factors,   including  customer
purchasing patterns, primarily driven by end-of-year expenditures,  and seasonal
demand  during the summer months for certain  laboratory  testing  services.  In
particular,  the Company's sales of its Quality Control  Products and Diagnostic
Components  typically  have been highest in the fourth quarter and lowest in the
first quarter of each fiscal year, whereas Specialty Clinical Laboratory Testing
has generally reached a seasonal peak during the third quarter,  coinciding with
the peak incidence of Lyme Disease.  Research  Contracts are generally for large
dollar  amounts  spread  over a one or two year  period,  and  upon  completion,
frequently  do not have  renewal  phases.  As a  result  they  can  cause  large
fluctuations  in revenue and net  income.  In  addition  to staff  dedicated  to
internal research and development, certain of the Company's technical staff work
on both  Contract  Research for  customers  and Company  sponsored  research and
development.  The allocation of certain technical staff to such projects depends
on the  volume of  Contract  Research.  As a result,  research  and  development
expenditures  fluctuate due to increases or decreases in Contract Research.  See
"Risk Factors -- Fluctuations in Quarterly Results of Operations."

    To develop new Quality Control  Products and support  increased  sales,  the
Company hired  additional  research and development  staff in the second half of
1995 and sales and marketing  staff in 1996. The Company  intends to continue to
add staff to these departments.  This should cause both research and development
and selling and  marketing  expenses to increase as a  percentage  of revenue in
1996 and 1997,  compared to 1995.  General and  administrative  expenses are not
expected  to increase  at the same rate,  as the  Company  has already  incurred
significant infrastructure expenses.

    The Company does not have any foreign operations.  However, the Company does
have significant export sales to agents under distribution  agreements,  as well
as  directly  to test kit  manufacturers.  All  sales  are  denominated  in U.S.
dollars. Export sales for the years ended December 31, 1993, 1994, and 1995 were
$1.4 million,  $2.3 million,  and $3.1  million,  respectively,  and for the six
months  ended  June 30,  1995 and  1996  were  $1.5  million  and $1.9  million,
respectively.  The  Company  expects  that  export  sales will  continue to be a
significant  source of revenue and operating income.  See "Risk Factors -- Risks
Associated with Export Sales."



                                       19


    The Company's cash flow from  operations  over the last three years has been
negative as it funded  investment in research and  development,  increased sales
and marketing  expenditures,  and supported growth-driven working capital needs.
The Company funded the shortfall  through a combination of sales of common stock
and bank financing.  The Company anticipates using a portion of the net proceeds
of this Offering for working  capital  requirements  until such time as its cash
flow from operations becomes sufficient.

RESULTS OF OPERATIONS

    The following  table sets forth for the periods  indicated the percentage of
total  revenue   represented  by  certain  items   reflected  in  the  Company's
consolidated statements of operations:

<TABLE>
<CAPTION>
                                               YEAR ENDED           SIX MONTHS
                                              DECEMBER 31,        ENDED JUNE 30,
                                              ------------        --------------
                                         1993     1994     1995    1995     1996
                                         ----     ----     ----    ----     ----
<S>                                     <C>      <C>      <C>      <C>     <C>
Revenue:
  Products                               43.1%    55.8%   54.0%    54.4%   57.0%
  Services                               56.9     44.2    46.0     45.6    43.0
    Total revenue                       100.0    100.0   100.0    100.0   100.0
Gross profit                             33.9     38.4    37.0     35.2    38.6
Operating expenses:
   Research and development               3.0      4.4     3.1      2.9     5.2
   Selling and marketing                  9.8     11.1    10.9     11.4    13.2
   General and administrative            17.7     19.1    18.9     19.0    15.7
     Total operating expenses            30.5     34.6    32.9     33.3    34.1
   Income from operations                 3.4      3.8     4.1      1.9     4.4
Interest expense                          2.0      2.3     2.7      3.0     2.4
  Income (loss) before income taxes       1.5      1.5     1.4     (1.1)    2.0
  Net income (loss)                       1.6      0.9     0.8     (0.6)    1.2
Product gross profit                     47.0%    46.6%   46.2%    45.6%   49.1%
Services gross profit                    24.0%    28.0%   26.2%    22.8%   24.6%
</TABLE>

 SIX MONTHS ENDED JUNE 30, 1996 AND 1995

    Total revenue  increased  24.5%,  or  $1,364,000,  to $6,928,000 for the six
months  ended  June 30,  1996 from  $5,564,000  in the prior year  period.  This
increase was the result of an increase in product  sales of 30.4%,  or $921,000,
to $3,946,000 from $3,025,000 and an increase in specialty  laboratory  services
of 17.4%, or $443,000, to $2,983,000 from $2,540,000.  Product revenue increased
primarily  as a result  of an  overall  increase  of 34.5%  in  Quality  Control
Products,  due to  sales  of new  products  and  increased  volume  of  existing
products,  including  an  increase  of 132.5% in the sales of  Accurun(tm).  The
increase in service  revenue was primarily  attributable  to a 19.0% increase in
Specialty  Clinical  Laboratory  Testing revenue,  particularly  molecular (PCR)
testing,  and the  addition  of two new  research  contracts  with the  National
Institutes of Health in the fourth quarter of 1995.

    Gross profit increased 36.5%, or $714,000,  to $2,672,000 for the six months
ended June 30, 1996 from  $1,958,000 in the prior year period.  The gross profit
margin  increased to 38.6% in the six months ended June 30, 1996 versus 35.2% in
the prior year  period.  Gross  margins  improved  in both  products,  (45.6% to
49.1%), and services (22.8% to 24.6%), as the Company benefited from an improved
revenue mix at the higher volume level.

    Research and development expenses increased 127.4%, or $203,000, to $362,000
for the six months  ended June 30, 1996 from  $159,000 in the prior year period.
Research and development costs as a percentage of revenues increased to 5.2% for
the six months ended June 30, 1996 from 2.9% in the comparable 1995 period. This
increase was primarily the result of increased  costs of personnel  hired in the
second half of 1995 which enabled the Company to introduce  over 30 new products
in the first half of 1996 compared with 15 new  introductions  in the prior year
period.


                                       20


    Selling and marketing expenses increased 43.6%, or $278,000, to $915,000 for
the six months ended June 30, 1996 from $638,000 in the prior year period.  This
increase was primarily attributable to increased personnel costs associated with
the addition of  tele-sales  staff for Quality  Control  Products,  particularly
Accurun(tm),  and increased  advertising  costs due to the  commencement  of the
Company's "Total Quality System" (TQS) marketing campaign.

    General  and  administrative   expenses  increased  3.0%,  or  $31,000,   to
$1,088,000  for the six months ended June 30, 1996 from  $1,057,000 in the prior
year period. As a result,  general and  administrative  expenses  decreased as a
percentage  of revenues to 15.7% for 1996 from 19.0% in the prior year period as
management maintained close control of expense levels.

    Interest expense was essentially  unchanged in the six months ended June 30,
1996 versus the prior year period as the prime rate  increases in late 1995 were
offset by reduced borrowing due to both additional equity raised and prepayments
from certain customers for contract research services.

 YEARS ENDED DECEMBER 31, 1995 AND 1994

    Total revenue  increased  14.4%, or $1,548,000,  to $12,271,000 in 1995 from
$10,723,000 in 1994. The increase in revenues was the result of a 10.7% increase
in product  revenues of  $640,000 to  $6,622,000  from  $5,981,000,  and a 19.1%
increase in service  revenues of $908,000 to $5,649,000  from $4,741,000 in 1995
compared  to 1994.  The  increase  in product  revenue  was  attributable  to an
increase  in prices at the  beginning  of 1995 and an  increase in the volume of
sales of  Quality  Control  Products  and  Basematrix  (part  of the  Diagnostic
Components  group),  which  increase  was  partially  offset by the  absence  of
revenues  in 1995  from two OEM  Quality  Control  Panel  contracts  which  were
completed in 1994.  The Company also  reduced  emphasis on certain  lower margin
Diagnostic  Components  as it focused  more  effort on sales of its  proprietary
Basematrix  product,  which carries a higher  margin.  During 1995,  the Company
reorganized  its sales and  marketing  department  and believes that this had an
adverse effect on sales growth for the period.  The increase in service  revenue
was primarily the result of increased specialty clinical laboratory testing, two
new research  contracts and increased  clinical trial services,  particularly in
the area of HIV.

    Gross profit  increased  10.4%,  or $426,000,  to  $4,539,000  for 1995 from
$4,113,000  in 1994.  Products  gross profit  increased  9.7%,  or $270,000,  to
$3,057,000 in 1995 from  $2,787,000 in 1994 as the products  sales  increase was
offset by a small  decrease in products  gross  profit  margin (to 46.2% in 1995
from 46.6%). The products gross margin decrease was a result of a small increase
in material handling personnel costs.  Services gross profit increased 11.8%, or
$156,000,  to $1,481,000 in 1995 from  $1,326,000 in 1994 as the sales  increase
was offset by a decrease in services  gross profit  margin to 26.2% in 1995 from
28.0% in 1994. Services gross margin declined primarily as a result of increased
personnel costs in the specialty clinical laboratory and an increase in contract
research activities, which carry a lower margin.

    Research  and  development  expenditures  decreased  20.0%,  or $94,000,  to
$376,000 in 1995 from  $469,000 in 1994.  The  decrease  resulted  from  certain
technical staff being utilized for Company sponsored research and development in
1994 and Contract  Research in 1995.  See "-- Years Ended  December 31, 1994 and
1993." Development  projects included  Accurun(tm),  molecular and immunological
Run Controls,  specialized  molecular  assays,  and the  development of a second
generation  Lyme Disease western blot test kit for internal use by the Company's
specialty testing laboratory.

    Selling and marketing expenses  increased 12.4%, or $148,000,  to $1,340,000
in 1995 from  $1,192,000  in 1994.  The increase was primarily  attributable  to
additional  sales and marketing  staff and overhead,  partially  offset by lower
trade show and travel expenses as the Company realized greater benefits from its
distributor network.

    General and administrative costs increased 13.1%, or $269,000, to $2,316,000
in 1995 from  $2,047,000 in 1994.  This increase was primarily  attributable  to
additional  staffing in support of revenue growth and higher reserve  provisions
for doubtful accounts associated with the increased volume of revenue related to
testing in situations  where payment to the Company  depends on collecting  from
the


                                       21

patient  rather than a healthcare  institution.  These  increases were partially
offset by lower  professional  fees. Also included in general and administrative
expense was approximately $60,000 of nonrecurring costs associated with the move
of the specialty testing laboratory into a larger, custom-designed facility.

    Interest  expense  increased  37.8%,  or  $92,000,  to $336,000 in 1995 from
$244,000 in 1994,  as the Company  funded its working  capital  needs  primarily
through increased borrowings.

 YEARS ENDED DECEMBER 31, 1994 AND 1993

    Total revenue  increased  17.1%, or $1,566,000,  to $10,723,000 in 1994 from
$9,157,000  in 1993.  This  increase  was a result  of a 51.7%,  or  $2,039,000,
increase in product sales, partially offset by a 9.1%, or $473,000,  decrease in
service revenue.  The product sales increase was primarily  attributable to unit
volume growth of both existing and new Quality  Control  Panels for HIV and HCV,
and, to a lesser extent, to sales of the Company's first molecular-based Quality
Control Panel targeted for end-user PCR training.  The service  revenue  decline
was primarily  attributable  to the  completion in February 1994 of a government
contract  with the United  States Army for  retrovirology  research that reduced
contract  research  revenue by  approximately  $1,000,000  in 1994 compared with
1993. This decrease was partially  offset by a $676,000,  or 35.5%,  increase in
specialty laboratory testing services.

    Gross profit  increased  32.5%,  or $1,009,000,  to $4,113,000 for 1994 from
$3,104,000 in 1993.  Products  gross profit  increased  50.3%,  or $933,000,  to
$2,787,000 in 1994 from  $1,855,000 in 1993 as the products  sales  increase was
partially  offset by a small decrease in products gross margin (to 46.6% in 1994
from  47.0%).  The products  gross margin  decrease was a result of higher costs
associated  with pilot  manufacturing  of  Accurun(tm).  Services  gross  profit
increased 6.1%, or $76,000, to $1,326,000 in 1994 from $1,250,000 in 1993 as the
sales  decrease was more than offset by an increase in services gross margin (to
28.0% in 1994 from 24.0%). Services gross margin increased primarily as a result
of improved economies of scale at its specialty clinical  laboratory afforded by
higher test volume,  and redeployment of staff into Company  sponsored  research
and development projects.

    Research and development  expenditures  increased by 68.3%, or $190,000,  to
$469,000 in 1994 from $279,000 in 1993 as the Company commenced several research
and development  projects,  including  development of Quality Control Panels for
molecular  diagnostics,  increased  expenditures related to the development of a
PCR test for Lyme Disease,  and a second  generation  Lyme Disease  western blot
test kit for internal use by the Company's specialty clinical laboratory.

    Selling and marketing expenses  increased 33.3%, or $297,000,  to $1,192,000
in 1994 from $894,000 in 1993. This increase was primarily attributable to staff
additions in sales and customer  service  support for the products  business and
also higher travel costs.

    General  and  administrative  expenses  increased  26.4%,  or  $428,000,  to
$2,047,000  in 1994  from  $1,619,000  in  1993.  This  increase  was  primarily
attributable  to a full year impact of staff  additions in information  systems,
regulatory  affairs and accounting in support of the Company's  sales growth and
growth  expectations  in both the Quality  Control  Products  and the  Specialty
Clinical Laboratory Services business.

    Interest  expense  increased  36.4%,  or  $65,000,  to $244,000 in 1994 from
$179,000  in 1993 as the  Company  funded its  increased  equipment  and working
capital needs primarily from borrowings.

LIQUIDITY AND CAPITAL RESOURCES

    The Company has  financed  its  operations  to date  through  cash flow from
operations, borrowings from banks and sales of equity.


    At June 30, 1996 the Company had  $1,398,000  outstanding  and $2,028,000 of
availability  under its $3.5 million Revolving Line of Credit Agreement due June
30, 1998 (the  "Revolver").  The Revolver  bears interest at a rate equal to the
prime rate plus 0.5% per annum,  currently  8.75%.  Prior to June 30, 1996,  the
Revolver  bore  interest  at a rate  equal to the prime  rate plus 1% per annum.
Under the terms of the  Revolver,  the  Company  operates  under a zero  balance
account arrangement whereby cash

                                       22



receipts are received into a lockbox at the bank and reduce the Revolver,  while
disbursements  for payroll and accounts  payable items increase the  outstanding
balance of the  Revolver.  Borrowings  under the  Revolver are limited to 80% of
eligible  accounts  receivable  plus  the  lesser  of 40% of  inventory  or $1.5
million.  The Revolver  contains  various  covenants  and  restrictions  and the
amounts  outstanding are secured by all of the Company's assets and a $2 million
life  insurance  policy  on an  officer/stockholder.  See Note 6 to Notes to the
Consolidated  Financial Statements.  The Company expects to use a portion of the
proceeds of the Offering to repay the  outstanding  amount  under the  Revolver,
which at October 23, 1996 was approximately  $2,400,000.  See "Use of Proceeds."
Amounts repaid on the Revolver will be available for reborrowing.


    Net cash provided by  operations  for the six months ended June 30, 1996 was
$685,000 as compared to $105,000 in the prior year period. This increase in cash
flow was primarily  attributable to an increase in net income and an increase in
deferred revenue from a payment of $308,000 under a research contract for future
clinical  trial  services.  Cash flow used in operations in 1995,  1994 and 1993
amounted to $29,000, $554,000 and $427,000,  respectively.  The decrease in cash
used in operations in 1995 from 1994 was primarily  attributable  to an increase
in deferred revenue.

    Cash used in investing activities for the six months ended June 30, 1996 was
$283,000 as compared to  $216,000  in the prior year  period.  This  increase in
investing  activities  was the  result of  increased  capital  expenditures  for
production  equipment  associated  with  Accurun(tm)  and other Quality  Control
Products.  Cash used in investing activities for 1995, 1994 and 1993 amounted to
$1,320,000,  $405,000 and $850,000,  respectively.  The increased use of cash in
1995  versus  1994  was  the  result  of  the  purchase  of the  Company's  West
Bridgewater facility and in 1993 related to the acquisition of the net assets of
North American Laboratory Group Limited, Inc.


    Cash used in financing activities for the six months ended June 30, 1996 was
$403,000 as compared to $151,000  provided by financing  activities in the prior
comparable year period. Net cash was used in financing activities primarily as a
result of the repayment of $1,591,000 of the Revolver  offset by $899,000 raised
through the sale of 117,647 shares of Common Stock to Kyowa Medex,  Co., Ltd. in
April 1996. Net cash provided by borrowings for 1995,  1994 and 1993 amounted to
$1,240,000, $846,000 and $494,000,  respectively, and net proceeds from the sale
of  Common  Stock for the same  periods  amounted  to  $176,000,  $170,000,  and
$765,000, respectively. The proceeds of such debt were used for working capital,
to acquire the West Bridgewater property and to purchase capital equipment.  The
Company  expects to use a portion of the  proceeds of the  Offering to repay the
outstanding  balances on these notes  payable,  which  aggregated  approximately
$1,714,203 at October 23, 1996. See "Use of Proceeds."


    Capital  expenditures  relate  primarily  to the  Company's  facilities  and
related  equipment.  For the six months  ended June 30,  1996 and 1995,  capital
expenditures  totaled  $283,000 and $216,000  respectively.  This  represents an
increase  of $67,000  in the six months  ended  June 30,  1996,  as the  Company
continues to invest in manufacturing  equipment and information  systems related
to both  operations  and finance.  In 1995,  1994 and 1993 capital  expenditures
amounted to $1,316,000,  $405,000 and $461,000,  respectively. In 1995, $806,000
of the  Company's  capital  expenditures  related  to the  purchase  of the West
Bridgewater  facility.  As of October 4, 1996, the Company has available to it a
$250,000  five  year term  facility  to  finance  equipment  purchases,  bearing
interest at prime plus 1%.

    The Company anticipates capital  expenditures to increase over the near term
as it  expects to use  approximately  $1.0  million  from the  proceeds  of this
Offering to expand its manufacturing  capacity in West Bridgewater over the next
12 months, of which  approximately  $500,000 will be spent on building expansion
and approximately $500,000 will be spent on equipment.  The Company also expects
to use  $522,500 to fund the  Company's  purchase of its second  installment  of
capital stock of BioSeq  following the completion of this Offering.  See "Use of
Proceeds."  The Company must make the remaining  $750,000  installment if BioSeq
attains certain technical milestones by July 31, 1997. If the milestones are not
achieved,  the Company will have the option to purchase the additional  $750,000
of BioSeq  capital  stock until  December 31, 1997.  The Company  believes  that
existing cash balances,  the borrowing  capacity  available  under the Revolver,
cash generated from  operations and the proceeds of this Offering are sufficient
to fund  operations and  anticipated  capital  expenditures  for the foreseeable
future. There were no material financial commitments for capital expenditures as
of June 30, 1996, and currently there are no material commitments for capital or
investment expenditures other than the BioSeq investment.



                                       23



    On April 26,  1996 the  Company  entered  into a new five year  distribution
agreement with Kyowa Medex,  Co., Ltd., a foreign  distributor,  extending a six
year old relationship.  Simultaneously, Kyowa Medex, Co., Ltd. purchased 117,647
shares of the Company's Common Stock at a price of $8.50 per share. The Purchase
Agreement includes a redemption right that may require the Company to repurchase
the  stock  at  $8.50  per  share  in  the  event  the  Company  terminates  the
distribution  agreement or it expires prior to the Company completing an initial
public  offering of its Common  Stock.  These shares have been  presented in the
Company's  balance sheet  separately as redeemable  Common Stock.  Completion of
this initial public offering will terminate the redemption  provisions and cause
the reclassification of these shares into stockholders' equity.


RECENT ACCOUNTING PRONOUNCEMENTS


    In March 1995, the Financial  Accounting Standards Board issued Statement of
Financial  Accounting  Standards  No. 121,  "Accounting  for the  Impairment  of
Long-Lived  Assets and for  Long-Lived  Assets to Be Disposed Of" ("SFAS  121").
SFAS 121 requires that an impairment  loss be recognized for  long-lived  assets
and certain identified  intangibles when the carrying amount of these assets may
not be  recoverable.  The Company has adopted SFAS 121 effective in 1996 and the
adoption did not have a material impact on the financial statements.


    In October 1995, the FASB issued Statement of Financial Accounting Standards
No. 123 ("SFAS 123")  "Accounting for Stock-Based  Compensation,"  which becomes
effective  for  fiscal  years  beginning  after  December  15,  1995.  SFAS  123
establishes  new financial  accounting and reporting  standards for  stock-based
compensation  plans.  However,  entities are allowed to elect whether to measure
compensation expense for stock-based  compensation under SFAS 123 or APB No. 25,
"Accounting  for Stock Issued to Employees." The Company has elected to continue
to account under APB No. 25 and will make the required pro forma  disclosures of
net  income and  earnings  per share as if the  provisions  of SFAS 123 had been
applied in its December 31, 1996 financial  statements.  The potential impact of
adopting this standard on the Company's pro forma  disclosures of net income and
earnings per share has not been quantified at this time.


                                       24




                                    BUSINESS

GENERAL

   
    The Company is a worldwide provider of proprietary  quality control products
for use with in vitro  diagnostic  test kits  ("test  kits") for the  detection,
analysis and monitoring of infectious  diseases,  including AIDS,  Hepatitis and
Lyme  Disease.  These  products  are used to develop  test  kits,  to permit the
monitoring  of  laboratory  equipment  and  personnel,  and to help  ensure  the
accuracy of test results.  The Company's  products are derived from human plasma
and serum using proprietary  manufacturing  processes.  The Company believes its
Quality Control Panel products are viewed as the current  industry  standard for
the  independent  assessment of the  performance of HIV and Hepatitis test kits.
The Company  also  manufactures  diagnostic  test kit  components  and  provides
specialty  laboratory   services,   including  clinical  trials.  The  Company's
customers include test kit manufacturers,  regulatory  agencies and end-users of
test kits such as blood banks,  hospital  laboratories  and  clinical  reference
laboratories.  Currently the Company's  products are used in connection with the
detection of more than 15  infectious  diseases,  and its  specialty  laboratory
services are used in connection with the detection of over 100 such diseases.
    

INDUSTRY OVERVIEW

    According to the World Health Organization ("WHO"),  infectious diseases are
now the leading  cause of  premature  death  around the world and the third most
common  cause of premature  death in the United  States.  In 1995,  more than 17
million people died from exposure to infectious  diseases,  constituting  nearly
one-third of the  approximately  52 million  people  worldwide who died from all
causes.  Currently,  the  Company  focuses  on two  infectious  diseases,  Viral
Hepatitis and AIDS,  which are among the largest  killers and are also a primary
focus of blood testing efforts worldwide.

    WHO estimates that  approximately  20 million people  worldwide are infected
with HIV,  and that  approximately  one million  people  died from  AIDS-related
illnesses  during  1995.  WHO  also  estimates  that  up to 350  million  people
worldwide  are infected  with  Hepatitis  Type B, one of several  types of Viral
Hepatitis, and that over one million people died of Viral Hepatitis during 1995.
In developed countries,  blood products are routinely screened for HIV and Viral
Hepatitis by use of infectious disease test kits.


    The  increased  threat  from  infectious  diseases  has  created a large and
growing  market  for test  kits.  Venture  Planning  Group,  a medical  products
research firm,  estimates that the worldwide  infectious disease test kit market
was  approximately  $2.7 billion in 1995,  and will grow to $5.0 billion by 2000
and $8.0 billion by 2005.


    Infectious  Disease Test Kits and Testing Methods.  Test kits contain in one
compact  package all of the materials  necessary to run a test for an infectious
disease. These include the disposable diagnostic components,  instructions,  and
reaction  mixing  vessels  (generally  96-well  plates or test tubes)  which are
coated  with the  relevant  infectious  disease  antigens,  antibodies  or other
materials.  To perform the test,  either a  technician  or a specially  designed
instrument  typically  mixes the  solutions  from the test kit with human  blood
specimens in a specific  sequence  according to the test kit  instructions.  The
mixture must then  "incubate" for up to 18 hours,  during which time a series of
biochemical  reactions trigger signals  (including color,  light and radioactive
count) which indicate the presence or absence and amount of specific  markers of
the particular disease in the specimen.

    Test kits  generally  employ one of three  methods  for  infectious  disease
testing: microbiology, immunology or molecular biology. Traditional microbiology
tests use a growth medium that enables an organism, if present, to replicate and
be detected visually.  Immunology tests detect the antigen or antibody, which is
an  indicator  (marker)  of the  pathogen  (e.g.,  virus,  bacterium,  fungus or
parasite).  Molecular diagnostic methods,  such as the polymerase chain reaction
("PCR"),  test for the presence of nucleic acids (DNA or RNA) which are specific
to a particular pathogen.

                                       25



    Most infectious disease tests currently use microbiological or immunological
methods.  However,  molecular  diagnostic methods are increasingly being used in
research laboratories  worldwide and the Company believes that soon they will be
accepted  for  routine  use in the  clinical  laboratory  setting.  The  Company
believes that the advent of molecular  diagnostic methods will complement rather
than diminish the need to test by microbiological and immunological  procedures,
because  different test methods  reveal  different  information  about a disease
state. The Company  anticipates that as new test methods become more widespread,
they will account for a larger portion of the Company's business.


    Quality Control for In Vitro Diagnostic Test Kits.  Customers employ quality
control  products  in order to develop  and use test kits (both  infectious  and
non-infectious).  Quality control products help ensure that test kits detect the
correct   analyte   (specificity),   detect   it  the   same  way   every   time
(reproducibility  or  precision),  and  detect  it  at  the  appropriate  levels
(sensitivity).  The  major  element  of  this  quality  control  process  is the
continuous  evaluation  of test kits by the testing of  carefully  characterized
samples that resemble the donor or patient samples routinely used with the test.
Quality  control  is used in both  the  infectious  and  non-infectious  disease
markets, although currently it is not as prevalent among end-users of infectious
disease test kits.


    The market for quality  control  products  consists  of three main  customer
segments:  (i) manufacturers of test kits, (ii) regulatory agencies that oversee
the  manufacture  and use of test kits and (iii) end-users of test kits, such as
hospitals, clinical reference laboratories and blood banks.

    According to the Genesis  Report Dx (May 1994), a medical  products  survey,
the quality  control market for in vitro  diagnostic  testing for infectious and
non-infectious  disease in 1994 totaled  approximately $600 million. The Company
believes that the market for quality  control  products for  infectious  disease
testing  currently  represents  less than five  percent of the  overall  quality
control  market.  At  the  present  time,  most  quality  control  products  for
non-infectious  disease test kits are sold to  end-users,  who have used quality
control  products as part of standard  laboratory  practice for several decades.
Conversely,  most quality control  products for the infectious  disease test kit
segment of the market are sold to test kit manufacturers and regulators, and not
to end-users,  who have  historically  used quality  control  products only on a
limited  basis.  The  Company  believes  that this  lower  level of usage  among
end-users  of  infectious  disease  test  kits is  primarily  due to  laboratory
practices  that have evolved from earlier  testing  methods that did not require
routine  and  extensive  use of  external  quality  controls as part of standard
laboratory practice. However, the Company also believes that this lower level of
usage among end-users of test kits represents a major market  opportunity  since
current testing methods have been improving test kit performance to increasingly
higher  levels of  sensitivity,  specificity  and  reproducibility.  The Company
believes  that these  three key  criteria  of test kit  performance  can be best
monitored through the use of quality control products, such as those sold by the
Company.

MARKET TRENDS

    The  Company  believes  that  end-users  of test kits will  become  the most
significant  users of quality control products in the infectious  disease market
and that the market for infectious disease test kits and related quality control
products  will continue to expand,  primarily as a result of the following  four
trends.

    Increased Regulatory Scrutiny.  Due to the high level of public concern with
the dangers of infectious diseases, particularly AIDS, Viral Hepatitis, and Lyme
Disease,  governmental  regulatory  agencies are requiring  additional  tests to
improve the safety of the blood  supply,  and are  requiring  manufacturers  and
end-users of test kits to adopt  quality  assurance  programs  applicable to the
entire test kit product life-cycle,  from initial product design and development
through  manufacture  and  end-use.  The  passage  of  the  Clinical  Laboratory
Improvement  Amendments  of  1988  ("CLIA")  and its  regulatory  implementation
beginning in 1992 have resulted in a set of  recommended  laboratory  practices,
including more stringent quality control programs, as well as regular government
inspections  aimed at improving the overall  standard of proficiency in clinical
laboratories.  As a result,  the Company believes that blood bank,  hospital and
clinical laboratory personnel are adopting more comprehensive  quality assurance
programs,  especially in  infectious  disease  testing,  to minimize the risk of
errors and to comply with CLIA and other regulations.

                                       26



    Growing  Recognition  of the Value of Using  Quality  Control  Products.  To
ensure the greatest possible safety of the blood supply, to achieve the earliest
possible  diagnosis  of  infection,  and to  minimize  the  occurrence  of false
negative results, sensitivity of tests (i.e., their ability to accurately detect
very small  amounts of the disease  marker) is a critical  element.  The Company
believes  there  is  increasing  recognition  of  the  benefit  of  continuously
monitoring test  sensitivity  using quality control  products to help ensure the
accuracy of each test run.

    New Diseases and the  Development  of New Therapies.  In recent years,  HIV,
Hepatitis C Virus ("HCV"),  Borrelia burgdorferi ("Lyme Disease") and Ehrlichia,
among  others,  have  emerged  as  significant  human  pathogens.  New and  drug
resistant strains of known pathogens, such as those causing tuberculosis, escape
mutants of  Hepatitis B Virus  ("HBV"),  and Group O and other  variants of HIV,
have also emerged. In response,  new and improved tests are being developed.  In
addition, as new drug therapies are introduced to treat infectious diseases, new
tests are needed to monitor the  effectiveness of these therapies.  For example,
the recent  advances in AIDS drug therapy,  which use a  combination  of several
drugs to treat infected patients, have prompted the creation of a new viral load
test used to  periodically  measure the precise amount of virus in the patient's
blood to evaluate the  effectiveness  of the drug therapy.  The Company believes
that  viral load  testing  will be applied  to  additional  areas of  infectious
disease, including Hepatitis B and C and Lyme Disease.

    Advanced  Test  Technologies  and  Equipment.  Test  kit  manufacturers  are
continuing to enhance the sensitivity,  specificity and reproducibility of their
tests.  Molecular  diagnostics  now permit the direct  detection  of the nucleic
acids (DNA and RNA)  specific to viruses and other  pathogens and are being used
to complement traditional microbiological and immunological tests for infectious
disease.  New tests  for  urine  and  saliva  have  been  developed  that  offer
advantages  in some settings over blood tests and may be more widely used in the
future.  Test kit  manufacturers  are also  developing  assays on silicon chips,
laser-read microspot arrays, and are using electrochemi- luminescence detection,
among other  technologies.  The different types of information  obtained through
the  complementary use of various  diagnostic  methods can provide the physician
with a broader  perspective  on the diagnosis  and prognosis of the disease,  as
well as on the effectiveness of drug therapy.

THE BOSTON BIOMEDICA ADVANTAGE


    The  Company  offers  a broad,  integrated  range of  products  for  quality
assurance  throughout the entire  infectious  disease test kit life-cycle,  from
initial  research and development,  through the regulatory  approval process and
test kit production, to training,  troubleshooting and routine use by end-users.
To directly  address  the  emerging  end-user  market  opportunity,  the Company
introduced its TQS marketing  platform based around its  Accurun(tm) Run Control
products.  The Company believes that TQS is the first  comprehensive  package of
quality control products designed  specifically for infectious  disease test kit
end-users,  providing them with a customized approach to evaluate all of the key
elements of the testing process.


    The Company believes that it has several  competitive  advantages which have
enabled  it to achieve  its  current  leadership  position  in  quality  control
products for infectious diseases:

    Valuable  Inventory.  The Company has an inventory of  approximately  50,000
distinct  human blood  specimens  accumulated  since 1986 through its  worldwide
sources of blood-supply.  This inventory cannot be easily or rapidly acquired on
the open market, and enables the Company to respond quickly to market trends and
customer needs.

    Specialty  Laboratory  Services and Clinical  Trials.  The knowledge  gained
through the Company's specialty laboratory services allows the Company to remain
at the  forefront of emerging  market trends and customer  needs.  By conducting
clinical  trials of new test kits  under  development,  the  Company  is able to
maintain  close  contact  with  manufacturers  and to  release  Quality  Control
Products for test kits soon after the test kits are introduced to the market. In
addition,  by operating a specialty clinical laboratory,  the Company is able to
better understand the requirements of the end-user.

                                       27



    Proprietary  Manufacturing  Know-How. As a result of ten years of experience
working with leading  worldwide  manufacturers  in the development of their test
kits and with regulators to help in the evaluation of test kits, the Company has
developed proprietary know-how in manufacturing its Quality Control Products.

    Reputation.  The Company  believes  that it has developed a reputation as an
authority in quality control products for infectious disease among manufacturers
and regulators of infectious  disease test kits.  The Company  believes that its
reputation,  established over the past ten years,  will assist it in penetrating
the emerging end-user market.

STRATEGY

    The  Company's  strategy  is to  enhance  its  leadership  position  in  the
infectious diseases quality control market and to take advantage of the emerging
opportunities  in the end-user  market for quality control  products.  There are
five key elements to this strategy:

    Capitalize on Emerging  End-User Market.  In 1996 the Company  introduced an
expanded line of Quality Control Products that are specifically designed for the
end-users  of  test  kits,   such  as  blood  banks,   hospitals   and  clinical
laboratories.  The  Company  plans to  continue  to expand  its line of  Quality
Control Products,  particularly its Accurun(tm) line of Run Controls, to cover a
wider range of immunological  and molecular  markers.  The Company also recently
introduced its Total Quality System ("TQS") marketing  platform,  which combines
Accurun(tm)  with other Quality  Control  Products to provide test kit end-users
with the products needed in an overall quality  assurance  program.  The Company
intends to continue to expand its sales,  marketing and distribution  activities
to support its product  development  program for the emerging  end-user  quality
control market.

    Develop New Products and Services.  The Company intends to capitalize on its
reputation  with  manufacturers  and  regulators by developing  Quality  Control
Products  and  Diagnostic  Components  for use with  test kits for both new test
methodologies and new diseases.  For example,  in response to a 1996 FDA mandate
that all blood collected for transfusion  must be tested for the presence of the
HIV antigen,  the Company recently  introduced on an OEM basis the first quality
control  training panels for use with the two FDA-licensed HIV antigen test kits
available in the United  States.  In addition,  the Company has also  provided a
training panel for end-users of the only  FDA-licensed  molecular  amplification
test for HIV RNA, and has  introduced a new line of HIV RNA controls to meet the
demand of the newly emerging viral load test market. In the future,  the Company
expects to provide  Quality  Control Panels for use with tests that  distinguish
among the  subtypes of HIV, the  serotypes  of HCV,  and the various  strains of
Mycobacteria causing tuberculosis.

    Enhance  Technical  Leadership.  The Company  seeks to expand its  technical
capabilities  by  continually   enhancing  its  strong   scientific   staff  and
collaborating with other scientists worldwide, thus strengthening its reputation
in the area of quality  control  for  infectious  disease  testing.  The Company
maintains and enhances its technical  leadership by  participating in scientific
studies  relevant to its products and services,  and by making  presentations at
scientific  meetings on blood  banking and  infectious  diseases.  The Company's
scientists also publish articles in peer reviewed journals.

    Capitalize on  Complementary  Business  Operations.  The Company  intends to
capitalize  on  operational  and marketing  opportunities  that arise out of its
activities in both  infectious  disease  products and laboratory  services.  For
example,  the Company  conducts  clinical trials for  manufacturers  of in vitro
diagnostic  products,  which allows the Company to maintain  close  contact with
test kit manufacturers  and regulators,  and enables the Company to evaluate new
technologies  in various stages of  development.  The Company  believes that the
reputation and experience of its  laboratory  and  scientific  staff,  its large
number of unique  Quality  Control  Panels,  and its inventory of  characterized
serum and plasma  specimens  assist the Company in marketing its clinical  trial
services to its customers.  Finally, the Company's specialty clinical laboratory
also affords the Company  access to materials  needed in the  production  of its
Quality Control Products and Diagnostic Components.

                                       28




    Pursue Strategic  Acquisitions and Alliances.  The Company intends to pursue
strategic  acquisitions  and  alliances  to expand its core  product  lines,  to
strengthen its base in medical science and technology,  and to secure sources of
blood supply. To date, the Company has acquired BTRL, a research and development
laboratory  with a strong  capability  in molecular  and cellular  biology,  and
BBI-NACL,  formerly North American  Laboratory  Group Ltd., Inc., a microbiology
and immunology clinical  laboratory  specializing in the diagnosis of infectious
diseases,   including  tick-borne  diseases.   These  acquisitions  led  to  the
introduction  in  1994 of the  Company's  first  Quality  Control  Products  for
molecular  diagnostics.  In October 1996,  the Company  entered into a strategic
alliance with BioSeq.  Under the License Agreement,  upon the earlier of payment
of the final installment of the Company's  aggregate  $1,482,500  investment and
December  31,  1997,  the  Company  will be granted the  worldwide  right to use
technology  which is being developed for DNA sequencing and analysis,  a process
which may allow for more precise  identification  of infectious  disease agents.
The Company  believes  that there may be  additional  acquisition  and  alliance
opportunities,  such as blood donor centers in strategic locations and companies
with  complementary   technology  or  synergistic   product  lines,  that  would
strengthen its existing business.


PRODUCTS

    The Company designs,  develops and markets diagnostic  products used for the
quality control, quality assurance and technical evaluation of test kits for the
laboratory  diagnosis of infectious  disease.  The Company  offers three product
groups: Quality Control Panels, Run Controls and Diagnostic Components.


     The Company manufactures its products from human plasma and serum which are
obtained from  nonprofit and commercial  blood centers,  primarily in the United
States.  The Company has  acquired and  developed an inventory of  approximately
50,000  individual  blood units and specimens (with volumes ranging from 1 ml to
800 ml) which provides most of the raw material for its products.


QUALITY CONTROL PANELS

    Quality  Control  Panels  consist  of blood  products  characterized  by the
presence or absence of  specific  disease  markers  and a Data Sheet  containing
comprehensive  quantitative data useful for comparative analysis.  These Quality
Control  Products are designed for measuring  overall test kit  performance  and
laboratory proficiency,  as well as for training laboratory  professionals.  The
Company's  Data Sheets are an integral  part of its  Quality  Control  Products.
These Data  Sheets are  created as the result of  extensive  testing of proposed
panel  components  in both  the  Company's  laboratories  and at  major  testing
laboratories on behalf of the Company in the United States and Europe, including
national  public health  laboratories,  research and clinical  laboratories  and
regulatory agencies. These laboratories are selected based on their expertise in
performing the appropriate tests on a large scale in an actual clinical setting;
this testing process provides the Company's  customers with the benefit that the
Quality  Control Panels they purchase from the Company have  undergone  rigorous
testing  in  actual  clinical  settings.  In  addition,   the  Company  provides
information on its Data Sheets on the reactivity of panel  components in all FDA
licensed test kits and all leading  European test kits for the target  pathogen,
as well as for all other appropriate markers of this pathogen.  For example, the
Company's HIV panel Data Sheets include anti-HIV by IFA, ELISA and western blot;
HIV antigen by ELISA; and HIV RNA by several  molecular  diagnostic  procedures.
The Company's Data Sheets require  significant time and scientific  expertise to
prepare.

    The Company first  introduced  Quality  Control  Panels in 1987. The Company
currently  offers a broad range of Quality Control Panels that address a variety
of needs of  manufacturers  and  regulators of test kits as well as blood banks,
hospitals,  clinical laboratories and other end-users.  Prices for the Company's
quality control  seroconversion,  performance and sensitivity  panels range from
$450 to $2,000  each,  and its  qualification  and OEM panels range from $100 to
$200 per panel. The following table describes the types of Quality Control Panel
products currently offered by the Company.

                                       29


                         QUALITY CONTROL PANEL PRODUCTS

<TABLE>
<CAPTION>
     PRODUCT LINE            DESCRIPTION                USE                 CUSTOMERS
     ------------            -----------                ---                 ---------
  <S>                    <C>                    <C>                   <C>
  Seroconversion         Plasma samples         Compare the           Test kit
   Panels                collected from a       clinical              manufacturers and
                         single individual      sensitivity of        regulators
                         over a specific        competing
                         time period showing    manufacturers' test
                         conversion from        kits, enabling the
                         negative to            user to assess the
                         positive for           sensitivity of a
                         markers of an          test in detecting a
                         infectious disease     developing
                                                antigen/antibody

  Performance            A set of 10 to 50      Determine test kit    Test kit
   Panels                serum and plasma       performance against   manufacturers and
                         samples collected      all expected levels   regulators
                         from many different    of reactivities in
                         individuals and        the evaluation of
                         characterized for      new, modified and
                         the presence or        improved test
                         absence of a           methods
                         particular disease
                         marker

  Sensitivity Panels     Precise dilutions      Evaluate the          Test kit
                         of human plasma or     low-end analytical    manufacturers
                         serum containing a     sensitivity of a
                         known amount of an     test kit
                         infectious disease
                         marker as
                         calibrated against
                         international
                         standards

  Qualification          Dilutions of human     Demonstrate the       Clinical reference
   Panels                plasma or serum        consistent            laboratories, blood
                         manifesting a full     lot-to-lot            banks, and hospital
                         range of               performance of test   laboratories
                         reactivities in        kits, troubleshoot
                         test kits for a        problems, evaluate
                         specific marker        proficiency, and
                                                train laboratory
                                                technicians

  OEM Panels             Custom-designed        Train laboratory      Custom designed
                         Qualification          personnel on new      with test kit
                         Panels for             test kits or          manufacturers and
                         regulators and test    equipment             regulators as an
                         kit manufacturers                            end-user product or
                         for distribution to                          for internal use
                         customers or for
                         internal use
</TABLE>

    Seroconversion  and  Performance  Panels  are  comprised  of unique and rare
plasma specimens  obtained from individuals during the short period of time when
the markers for a particular  disease are converting  from negative to positive.
As a result, the quantity of any such panel is limited, so that the Company must
replace these panels as they sell out with another panel  comprised of different
specimens  equally unique and rare. The Company  believes that its inventory and
relationships with blood centers affords it a competitive advantage in acquiring
such plasma for  replacement  panels and  developing new products to meet market
demand.  There can be no assurance  that the Company will be able to continue to
obtain  such  specimens.  See "Risk  Factors  --  Difficulty  in  Obtaining  Raw
Materials."

    The Company  believes  that it offers its customers a broad range of Quality
Control Panel products to address the requirements of the complete life-cycle of
a test kit,  from  initial  research  and  development,  through the  regulatory
approval process, test kit production, training, troubleshooting and routine use
by end-users.  The Company  further  believes that its Data Sheets,  an integral
part of all  panel  products,  offer its  customers  in-depth  information  on a
particular test kit of interest. Quality

                                       30



Control Panels  currently  span the  immunologic  markers for AIDS (i.e.,  HIV),
Hepatitis B and C, Lyme Disease and ToRCH (Toxoplasma,  rubella, cytomegalovirus
and  herpes  simplex  virus).  New  introductions  this year  include  molecular
Performance Panels for HBV and HCV,  qualification  panels for HIV, HBV and HCV,
and additional Seroconversion Panels for HIV, HBV, and HCV.

ACCURUN(TM) RUN CONTROLS

    End-users  of test kits  utilize Run  Controls  to confirm  the  validity of
results by monitoring test performance,  thereby  minimizing false negative test
results and  improving  error  detection.  Run  controls  consist of one or more
specimens of known  reactivity  that are tested  together  with donor or patient
samples in an assay to  determine  whether  the assay is  performing  within the
manufacturer's  specifications.  Clinical  laboratories  generally process their
patient  specimens in a batch processing  mode, and typically  include 25 to 100
specimens to be tested in each batch (a "run").  Large  laboratories may perform
several runs per day, while smaller  laboratories  may perform only a single run
each day, or sometimes only several runs per week. A clinical laboratory using a
Run Control will place the Run Control  product in a testing well or  test-tube,
normally used for a specimen,  and will test it in the same manner that it tests
the donor or patient specimens. It will then compare the results generated to an
acceptable range, determined by the user, to measure whether the other specimens
are  being  accurately  tested.  The  Run  Control  result  must be  within  the
acceptable range to be considered  valid. This is often tracked visually using a
Levey-Jennings chart.  Depending upon a particular  laboratory's quality control
practices,  it may use several  Run  Controls on each run or it may simply use a
Run Control in a single run at the beginning and end of the day.

    The Company  believes its  Accurun(tm)  product line  provides the following
benefits to end-users:

    * Helps to satisfy the requirements of Good Laboratory Practice.

    * Tracks the accuracy and precision of test runs.

    * Detects  laboratory  errors and  identifies  trends  before  they become a
      problem.

    * Monitors test kit performance, equipment and personnel.

    * Helps  to  meet  National  Committee  For  Clinical  Laboratory  Standards
      ("NCCLS")  for  molecular  and   immunological   diagnostic   methods  for
      infectious disease quality control.

    * Documents the validity of test results, day to day, week to week.

    The Company  introduced its first four  Accurun(tm) Run Control  products in
the fourth  quarter of 1993 and has since  developed  and  released  for sale an
additional  24  Accurun(tm)  products.  A limited  number of these  products are
available for diagnostic purposes;  the others currently are limited to research
use. See " -- Government  Regulation."  Current Accurun(tm) Run Control products
range in price from $15 to $45 per milliliter and are described in the following
table.

                         ACCURUN(TM) RUN CONTROLS
<TABLE>
<CAPTION>
                                     CURRENT
                                                            NUMBER OF               PRIMARY
     PRODUCT LINE                 DESCRIPTION                PRODUCTS             CUSTOMER(S)
     ------------                 -----------                --------             -----------
  <S>                    <C>                                 <C>           <C>
  Accurun(tm) 1-99       Multi-marker Run Control for           4          Blood Banks
                         immunological tests
  Accurun(tm) 100-199    Single-marker Run Control              17         Hospitals and clinical
                         for immunological tests                           reference laboratories
  Accurun(tm) 200-299    Multi-marker Run Control for           1          Research and specialty
                         molecular tests                                   laboratories
  Accurun(tm) 300-399    Single-marker Run Control              3          Research and specialty
                         for molecular tests                               laboratories
  Accurun(tm) 800-899    Negative Run Control for               3          All laboratories
                         immunological and molecular
                         tests
</TABLE>

                                       31



    The  Company's  Accurun(tm)  family of products is targeted at the  emerging
market of end-users of infectious  disease test kits. The Company  believes that
it offers the most comprehensive line of Run Controls in the industry,  and that
its  Accurun(tm)  products,  in  combination  with  its  Quality  Control  Panel
products,  provide an  extensive  line of  products  for  quality  assurance  in
infectious disease testing. See "-- Sales and Marketing." The Company intends to
continue  to expand its line of  Accurun(tm)  products,  thereby  providing  its
customers with the convenience and cost  effectiveness  of a single supplier for
independent run controls.  See "Risk Factors -- Undeveloped  End-User Market For
Quality Control Products for Infectious Disease Test Kits."


    The Company has received 510(k) clearance from the FDA to market its Accurun
1(R) line, for diagnostic purposes,  and intends to apply for such clearance for
the remainder of its  Accurun(tm)  products.  All of the  Company's  Accurun Run
Controls  will  require  FDA  premarket  clearance  or  approval  prior to being
marketed for diagnostic use. An application for clearance for diagnostic use for
one additional Accurun(tm) product has been submitted by the Company to the FDA,
and the Company  anticipates that  applications for  approximately 16 additional
Accurun(tm)  products  will be prepared  and  submitted to the FDA by the end of
1997.  Failure to obtain,  or delays in  obtaining,  such  clearance or approval
would  adversely  affect the Company's  strategy of capitalizing on the end-user
market. See "Risk Factors -- Stringent Government Regulation" and "-- Government
Regulation."


DIAGNOSTIC COMPONENTS

    Diagnostic  Components are the individual  materials  supplied to infectious
disease test kit manufacturers  and combined (often after further  processing by
the manufacturer) with other materials to become the various fluid components of
the manufacturer's test kit. The Company supplies Diagnostic  Components in four
product  lines:  Normal  Human  Plasma,  Normal  Human  Serum,  Basematrix,  and
Characterized  Disease State Serum and Plasma. Normal Human Plasma and Serum are
both the clear  liquid  portion of blood which  contains  proteins,  antibodies,
hormones  and  other  substances,  except  that the  Serum  product  has had the
clotting factors removed.  Basematrix, the Company's proprietary processed serum
product that has been  chemically  converted  from  plasma,  is designed to be a
highly-stable,  lower cost  substitute  for most  Normal  Human Serum and Plasma
applications.  Characterized  Disease State Serum and Plasma are collected  from
specific  blood  donors  pre-selected  because of the  presence  or absence of a
particular   disease  marker.   The  Company  often  customizes  its  Diagnostic
Components by further  processing the raw material to meet the specifications of
the test kit manufacturer.  The Company's  Diagnostic  Components range in price
from $0.25 to $60 per milliliter, with the majority selling between $0.50 and $5
per milliliter.

    The  Company  believes  that  it  has  several  competitive   advantages  in
Diagnostic Components. Through its trained and experienced laboratory staff, the
Company  is able to  perform  comprehensive  in-house  testing  for a number  of
markers in a  particular  material,  and  consequently  is able to  address  the
demands of its customers.  The Company's large inventory of approximately 50,000
specimens  provides it with the  flexibility  to produce  Diagnostic  Components
efficiently and rapidly in response to customer  requests.  The Company believes
that its proprietary  manufacturing  knowledge enables it to manufacture stable,
high quality products to meet the demands of its worldwide customer base.

SERVICES

    The Company  seeks to focus its  specialty  laboratory  services in both the
clinical  reference  laboratory testing and advanced research areas. The Company
concentrates its services in those areas of infectious disease testing which are
complementary to its quality control and diagnostic products businesses.

    Specialty Clinical Laboratory  Testing.  The Company operates an independent
specialty  clinical  laboratory  which  performs both routine and  sophisticated
infectious  disease testing in microbiology,  immunology and molecular  biology,
with special emphasis in AIDS,  Viral Hepatitis and Lyme Disease.  The Company's
specialty  clinical  laboratory  combines  traditional  microbiology,   advanced
immunology, and current molecular diagnostic techniques,  such as PCR, to detect
and identify  microorganisms,  their antigens and related antibodies,  and their
nucleic  acids  (i.e.,  DNA and RNA).  Customers  include  physicians,  clinics,
hospitals and other clinical/research laboratories.

                                       32




    Contract  Research.  The  Company  offers a  variety  of  contract  research
services in molecular  biology,  cell  biology and  immunology  to  governmental
agencies,   diagnostic  test  kit  manufacturers  and  biomedical   researchers.
Molecular  biology  services  include DNA  sequencing,  recombinant DNA support,
probe  labeling  and custom PCR assays.  Cell  biology and  immunology  services
include sterility testing,  virus infectivity  assays,  cultivations of virus or
bacteria from clinical specimens,  preparation of viral or bacterial antigens or
nucleic acids, and production of antibodies.  The Company is currently providing
research  services for assessment of the efficiency of candidate HIV vaccines in
a monkey model system under two separate  contracts with the National  Institute
for Allergy and Infectious Disease ("NIAID"),  a part of the National Institutes
of Health ("NIH").  Each of these contracts has a two year term which expires in
September  1997.  In  addition,  since  1983,  the  Company,  through  its  BTRL
subsidiary,  has  provided  blood  processing  and  repository  services for the
National Cancer Institute ("NCI"), also a part of the NIH. The repository stores
over 2,000,000 specimens and processes or ships up to several thousand specimens
per week in support of various NIH cancer and virus research programs. While the
current NCI  repository  contract  terminates in February  1997, the Company has
responded to a Request for Proposals by the United States  government  for a new
four year contract to replace this contract.  There can be no assurance that any
of these  contracts  will be replaced with new  contracts.  See "Risk Factors --
Dependence on Key Customers."


    Small Business  Innovation  Research  ("SBIR")  grants and other  government
contracts  similar to the ones  described  have  enabled  the Company to develop
technologies  applicable to new product  development and its specialty  clinical
laboratory.  For example, recent SBIR grants have enabled the Company to develop
PCR based  assays for the  detection  of the nucleic  acids of HIV, HCV and Lyme
Disease.  Although the Company does not currently  have any SBIR grants,  it has
two  pending  applications  for such  grants  and  intends to  continue  to seek
government  grants and contracts that further the Company's core  technology and
commercial business. There can be no assurance that the Company will receive any
government research grants in the future.

    Clinical  Trials.  The Company  conducts  clinical  trials for  domestic and
foreign test kit manufacturers.  Test kit manufacturers must conduct such trials
to collect data for  submission  to the United  States FDA and other  regulatory
agencies.  By  providing  this  service,  the Company is able to maintain  close
contact with test kit manufacturers and regulators,  and is able to evaluate new
technologies  in various stages of  development.  The Company  believes that the
reputation of its laboratory and scientific  staff,  its large number of Quality
Control Panels,  and its inventory of  characterized  serum and plasma specimens
assist the Company in marketing its clinical  trial  services to its  customers.
The  Company has  performed  clinical  trials for a number of United  States and
foreign  test kit  manufacturers  seeking  to  obtain  FDA  approval  for  their
infectious disease test kits.

    Drug Screening Program. As a subcontractor for an NIH AIDS grant held by the
University  of North  Carolina at Chapel Hill,  the Company has  established  an
anti-HIV  drug  screening  program to test a large  number of  natural  products
(largely plant derivatives) to determine whether they inhibit HIV replication in
an in vitro assay system. These in vitro assays are also offered as a service to
researchers  and  pharmaceutical  companies  who wish to test various  candidate
anti-viral agents for anti-HIV activity.

RESEARCH AND DEVELOPMENT

    The Company's  research and development effort is focused on the development
of (i) new and improved  Quality  Control  Products  for the  emerging  end-user
market,  (ii) new products for existing customers,  (iii) Diagnostic  Components
for use with test kits for both new test  methodologies  and new  diseases,  and
(iv)  infectious  disease  testing  services  using PCR and other  amplification
assays for AIDS, Viral Hepatitis, Lyme Disease and Chlamydia,  among others. The
Company  has  approximately  20 full or  part-time  employees  dedicated  to its
research  and  development  effort.  For the six months  ended June 30, 1996 the
Company  increased  spending on research  and  development  as a  percentage  of
revenues compared to the same period ended June 30, 1995 and expects to continue
to increase such  expenditures  as a percentage of revenues for the next several
years.  See  "Management's  Discussion  and Analysis of Financial  Condition and
Results  of  Operations  --  Results  of  Operations."  The  Company's  research
scientists  work closely with sales,  marketing and  manufacturing  personnel to
identify and prioritize the development of new products and services.

                                       33



    The Company's product  development  activities center on the  identification
and  characterization  of materials for the  manufacture of new Quality  Control
Products and the replacement of sold-out products. For example, during 1996, the
Company has introduced 10 new Seroconversion,  Performance and Sensitivity Panel
products as well as 14 new  Accurun(tm) Run Controls;  in addition,  during July
1996, the Company released its first Qualification  Panel products.  The Company
is developing new Quality  Control  Products for use with  molecular  diagnostic
tests for HIV, HCV and HBV.  Recently the Company  expanded its Quality  Control
Product  line beyond the  retrovirus  and Viral  Hepatitis  diagnostics  area to
include sexually  transmitted  diseases (e.g.,  Syphilis),  tick-borne  diseases
(e.g., Lyme Disease), and respiratory and other infections (e.g.,  Tuberculosis)
and is  continuing to develop new Quality  Control  Products for these and other
diseases.  The Company has increased the number of Quality  Control  Products it
offers from approximately 20 in 1990 to approximately 150 products in 1996.

    The Company is also developing new and improved infectious disease specialty
tests for Lyme Disease and other  tick-borne  diseases for use in its  specialty
laboratory  business.  For  example,  the Company was among the first to develop
enzyme  immunoassays  and Western Blot assays for Lyme  Disease.  The Company is
also  pursuing  new  applications  of  PCR  technology  to  infectious   disease
diagnostics,  such as  amplification  assays for the  pathogens  of AIDS,  Viral
Hepatitis,  Lyme Disease and  Chlamydia,  and for the direct  detection of other
infectious agents in blood, tissues and other body fluids.

    From time to time in the  past,  the  Company  has  funded a portion  of its
research and development activities from grants provided by various agencies and
departments of the U.S. government. See "-- Services."

STRATEGIC ALLIANCES


    University  of North  Carolina  at Chapel  Hill.  The  Company  is  directly
supporting  a drug  discovery  program  at UNC,  in which a  full-time  research
scientist is working to develop synthetic derivatives of anti-HIV compounds that
have been  discovered  pursuant to the Company's joint  collaboration  with UNC.
This  research  scientist is also working to  introduce  modifications  to these
derivatives that would make them more soluble,  less toxic, or otherwise enhance
their anti-viral properties. UNC has licensed to the Company exclusive worldwide
rights to three series of patent  applications filed by the Company and UNC with
respect  to  three  classes  of  anti-HIV  compounds.  Two such  compounds  have
exhibited  therapeutic indices in in vitro test model systems in excess of those
recorded  for AZT under  comparable  test  conditions.  The Company is expending
approximately  $100,000 per year for research and development  relating to these
compounds.  In  addition,  under this  license,  the Company  will also have the
rights to any new anti-HIV  compounds or derivatives  developed in the course of
this  sponsored  research,  provided  the  Company  obtains  certain  regulatory
approvals from the FDA. See "-- Services."

    Ajinomoto  Co., Inc. The Company  entered into an agreement  with  Ajinomoto
Co., Inc. in October 1995  pursuant to which the Company is performing  research
regarding  among other  things,  whether tests for certain amino acids in plasma
can be used to  determine  a person's  immune  status,  particularly  in chronic
fatigue  syndrome.  This  project  is funded by  Ajinomoto  and has a three year
budget of approximately $1,000,000.  Discoveries and inventions arising from the
research  will be owned by  Ajinomoto,  but the  Company  has the right of first
refusal to obtain  certain  exclusive  licenses  from  Ajinomoto of any patented
technology  arising  from the  research.  The  Company  is  entitled  to certain
royalties  based  upon a  percentage  of sales of  products  arising  out of the
research. This agreement expires in September 1998.

    BioSeq,  Inc. In October 1996, the Company entered into a strategic alliance
with  BioSeq,  an  early  stage  biotechnology  company  that  is  developing  a
technology  that may,  through the use of  pressure,  be able to more  precisely
control  chemical  reactions.  The Company  believes that this technology may be
useful  for  sequencing,  synthesizing  and  characterizing  nucleic  acids  and
proteins, which may then allow for the more precise identification of infectious
disease agents.

    The Company has agreed to purchase approximately 19% of the capital stock of
BioSeq for an aggregate of $1,482,500 in three installments.  Of the $1,482,500,
$210,000 has been invested and $522,500 will be invested upon  completion of the
Offering.  The Company must make the remaining  $750,000  installment  if BioSeq
attains  certain  technical  milestones by July 31, 1997. If such milestones are
not  attained by BioSeq by July 31,  1997,  the Company  will have the option to
make the remaining  $750,000  investment  until  December 31, 1997.  See "Use of
Proceeds." The Company has price  anti-dilution  protection,  pre-emptive rights
and the  right to board  representation,  the  last of which  terminates  if the
Company fails to make the second installment

                                       34



under the Purchase Agreement.  In addition, the Company was granted the right to
acquire additional shares of common stock of BioSeq for additional consideration
under certain  conditions,  provided that this right is not  exercisable  to the
extent it would cause the Company's  ownership of BioSeq to equal or exceed 20%.
BioSeq has also  agreed to engage the  Company to perform a minimum of  $100,000
and $150,000 of research and development  services  following the payment of the
second and third installments, respectively.

    Under the  License  Agreement,  upon the  earlier  of  payment  of the final
installment of the Company's  investment and December 31, 1997, the Company will
be granted a worldwide right to use the BioSeq technology relating to sequencing
and analysis  services.  The License will be  exclusive  until BioSeq  commences
selling on a  commercial  basis the  equipment  used in the DNA  sequencing  and
analysis  process,  at which time the  License  will become  non-exclusive.  The
License  provides that the Company will pay BioSeq certain  royalties based upon
net  revenues  arising out of the  services  performed  by the Company  with the
licensed technology.


SALES AND MARKETING

    The  Company's  sales and  marketing  efforts are  directed by a Senior Vice
President of Sales and Marketing  who  supervises 15 sales people and four other
full-time sales and marketing employees.


    The Company's marketing strategy is focused upon addressing the needs of its
customers in the infectious  disease  testing market  throughout the entire test
kit life-cycle,  from initial research and  development,  through the regulatory
approval  process and test kit  production,  to  training,  troubleshooting  and
routine use by  end-users  such as clinical  laboratories,  hospitals  and blood
banks.  By serving its  customers at all stages of the product  life-cycle,  the
Company  expects  to stay at the  forefront  of  trends  in  infectious  disease
testing,  which in turn  enables  the Company to  anticipate  and respond to the
needs of the marketplace.


    The Company  recently has begun to focus its sales and marketing  efforts on
the emerging end-user market for quality control products for infectious disease
test kits.  To promote  this  objective,  the  Company is  implementing  a major
marketing platform, known as "Total Quality System" ("TQS"). TQS is a package of
Quality  Control  Products,  including the Company's  Accurun(tm)  Run Controls,
which is designed to provide test kit end-users  with the products  needed in an
overall  quality  assurance  program.  These  products  enable  laboratories  to
evaluate each of the key elements involved in the testing process: the test kit,
laboratory  equipment and laboratory  personnel.  The Company  believes that TQS
effectively  addresses  the need for  end-users  to ensure the accuracy of their
test results.  The Company intends to continue to expand its sales and marketing
activities with respect to its Accurun(tm) line of Run Control  products.  Since
the beginning of 1996, the Company has hired two new employees for the sales and
marketing of its Accurun(tm) line of products and expects to add six more direct
salespeople by the end of 1997.

    The  Company's   products  are  currently  sold  through  a  combination  of
telephone,  mail,  third party  distributors  and limited  direct sales efforts.
Domestically,  products are sold through an in-house tele-sales group consisting
of five sales  representatives,  two sales  managers  and one  customer  service
representative.  Internationally,  the Company  distributes  its  products  both
directly and through 17 independent  distributors  located in Japan,  Australia,
South America,  Southeast Asia, Israel and Europe.  The Company's  international
sales manager  oversees the Company's  foreign  distributors.  During the fiscal
years  1993,  1994,  1995 and the six months  ended  June 30,  1995 and 1996 the
Company's  distributors  accounted for 1.9%,  4.3%,  6.9%,  6.8% and 8.9% of the
Company's  total revenue,  respectively.  The Company  intends to further expand
sales through  international  distributors,  although there can be no assurances
that it will be able to do so. See "Risk Factors -- Risks Associated with Export
Sales."

    The Company's  Specialty  Clinical  Laboratory Testing services are marketed
primarily  through a direct  domestic  sales  force  consisting  of seven  sales
representatives  managed  by a sales  director.  The sales  representatives  are
located throughout the eastern and mid-western United States. They are supported
internally by a client services representative.

    The  Company  emphasizes  high  quality  products  and  services,  technical
knowledge,  and responsiveness to customer needs in its marketing activities for
both products and services. The Company educates its distributors, customers and
prospective  customers about its products through a series of detailed marketing
brochures,  technical  bulletins and  pamphlets,  press releases and direct mail
pieces.  These  materials are  supplemented  by  advertising  campaigns in major
industry  publications,  technical  presentations,  and  exhibitions  at  local,
national and international trade shows and expositions.

                                       35



CUSTOMERS


    The  Company's   customers  for  Quality  Control  Products  and  Diagnostic
Components  comprise  three major  groups:  (i)  international  diagnostics  and
pharmaceutical  manufacturing  companies,  such as Abbott Diagnostics,  Behring,
Boehringer  Mannheim,  Chiron,  Fujirebio,  Hoffman LaRoche,  Ortho  Diagnostics
(Johnson and Johnson),  Sanofi Diagnostics and Sorin Biomedica;  (ii) regulatory
agencies  such as the United States FDA, the British  Public  Health  Laboratory
Service, the French Institut National de la Transfusion Sanguine, and the German
Paul Ehrlich  Institute;  and (iii)  end-users of diagnostic  test kits, such as
hospital  clinical  laboratories,  public health  laboratories  and blood banks,
including the Swiss Red Cross,  United Blood Services and Kaiser Permanente.  In
1995,  the  Company  sold  products  to   approximately   100   diagnostics  and
pharmaceutical  manufacturers,  15 regulatory agencies,  and 250 end-users.  The
Company's  Specialty  Clinical  Laboratory Testing services are sold to hospital
and  clinical  laboratories,  blood  banks,  researchers  and other  health care
providers.  The Company's Contract Research services are typically offered under
contracts  to  governmental  agencies,  diagnostic  test kit  manufacturers  and
biomedical researchers.  See "Management's  Discussion and Analysis of Financial
Condition and Results of Operations -- Overview."

    The Company does not have long-term contracts with its customers for Quality
Control Products and Diagnostic  Components.  The Company's products are sold to
its customers pursuant to purchase orders for discrete  purchases.  Although the
Company believes that its  relationships  with these customers are satisfactory,
termination of the Company's  relationship  with any one of such customers could
have a material  adverse effect on the Company.  See "Risk Factors -- Dependence
on Key Customers."


    During the fiscal years 1993,  1994 and 1995,  and the six months ended June
30, 1995 and 1996, sales to the Company's three largest customers  accounted for
an aggregate  of  approximately  20% of the  Company's  net sales,  although the
customers  were not  identical in each period and no one customer  accounted for
more than 10% of net sales.

MANUFACTURING AND OPERATIONS

    The Company manufactures and assembles  substantially all of its products at
its facility in West  Bridgewater,  Massachusetts.  The Company has computerized
purchasing,  inventory,  and test result and  materials  tracking  systems in an
integrated  operations  management  system,  and believes that these systems are
adequate  for its  current  level  of  production,  but  would  require  further
enhancements if the Company  experiences  substantial future growth. The Company
acquires raw materials  from a variety of vendors and through a program of donor
recruitment,  donor screening, product collection,  product characterization and
donor management. All important materials have multiple sources of supply.

    The Company's West Bridgewater facility contains  environmentally-controlled
freezers and cold rooms, which are used to store raw materials for manufacturing
and  finished  products.  More  than  3,000  square  feet of  space  in the West
Bridgewater  facility is dedicated to freezers and cold rooms.  The freezers and
cold rooms are monitored  continuously  and the Company  maintains a natural gas
fired emergency generator in the event of a power outage.

    The Company also  operates a specialty  clinical  laboratory in New Britain,
Connecticut and a research and development laboratory in Rockville, Maryland.
See "-- Properties."

COMPETITION

    The market for the  Company's  products and services is highly  competitive.
Many of the Company's  competitors  are larger than the Company and have greater
financial,   research,   manufacturing,   and  marketing  resources.   Important
competitive  factors for the Company's products include product quality,  price,
ease of use,  customer  service and  reputation.  In a broader  sense,  industry
competition  is based upon  scientific  and  technical  capability,  proprietary
know-how, access to adequate capital, the ability to develop and market products
and processes,  the ability to attract and retain qualified  personnel,  and the
availability of patent protection. To the extent that the Company's products and
services do not reflect technological advances, the Company's ability to compete
in those products and services could be adversely affected. See "Risk Factors --
Risk of Technological Change" and "-- Competition."

    In the area of Quality Control Products,  the Company competes in the United
States  primarily with NABI (formerly North American  Biologicals,  Inc.) in Run
Controls and Quality Control Panel products and Blackhawk Biosystems Inc. in Run
Controls.  In Europe,  the  Netherlands  Red Cross has recently

                                       36



begun offering several Run Control and panel products. The Company believes that
all three of these  competitors  currently offer a more limited line of products
than the Company,  although there can be no assurance  these  companies will not
expand their product lines.

    In the Diagnostic  Components area, the Company competes against  integrated
plasma collection and processing companies such as Serologicals,  Inc. and NABI,
as well as smaller,  independent plasma collection centers and brokers of plasma
products.  In the Diagnostic  Components area, the Company competes on the basis
of quality, breadth of product line, technical expertise and reputation.

    The  Company  believes  that it has  competitive  advantages  in the quality
control products and diagnostic components industry. These include its access to
raw materials, technical know-how, broad product line and established reputation
among large diagnostics and pharmaceutical manufacturers,  as well as regulatory
agencies.

    In  the  Specialty  Clinical  Laboratory  Testing  services  portion  of the
Company's business, it competes with large national reference laboratories, such
as LabCorp of America,  Corning  Clinical  Laboratories  and SmithKline  Beecham
Clinical  Laboratories,  as well as several independent  regional  laboratories,
hospital  laboratories,  government  contract  laboratories  and large  research
institutions.  The Company  believes that by focusing on the specialty  clinical
laboratory  market,  it is able to offer  its  customers  a  higher  value-added
service on the more complex  diagnostic tests than the larger national reference
laboratories.

GOVERNMENT REGULATION

    The manufacture  and  distribution of medical  devices,  including  products
manufactured  by the Company that are intended for in vitro  diagnostic use, are
subject to extensive  government  regulation  in the United  States and in other
countries. See "Risk Factors -- Stringent Government Regulation."

    In the United States,  the Food,  Drug, and Cosmetic Act ("FDCA")  prohibits
the marketing of in vitro  diagnostic  products  until they have been cleared or
approved by the FDA, a process that is time-consuming, expensive, and uncertain.
In  vitro  diagnostic  products  must  be the  subject  of  either  a  premarket
notification   clearance  (a  "510(k)")  or  an  approved   premarket   approval
application  ("PMA").  With  respect  to  devices  reviewed  through  the 510(k)
process,  a Company may not market a device for diagnostic use until an order is
issued by FDA finding the product to be  substantially  equivalent  to a legally
marketed  device.  A  510(k)  submission  may  involve  the  presentation  of  a
substantial  volume  of  data,  including  clinical  data,  and  may  require  a
substantial  period of review.  With respect to devices reviewed through the PMA
process,  a  Company  may not  market  a device  until  FDA has  approved  a PMA
application,  which must be supported by extensive data,  including  preclinical
and clinical trial data, literature,  and manufacturing information to prove the
safety and effectiveness of the device.

    The Company's  Accurun Run Controls,  when marketed for diagnostic use, have
been classified by the FDA as medical devices. The Accurun 1(R) Multi-Marker Run
Control,  which  include  eight  analytes,  has been cleared  through the 510(k)
process. The Company expects that, in the future, most of its products that need
FDA premarket review also will be reviewed  through the 510(k) process.  The FDA
could, however,  require that some products be reviewed through the PMA process,
which  generally  involves a longer  review  period and the  submission  of more
information  to FDA.  There can be no  assurance  that the  Company  will obtain
regulatory  approvals on a timely basis, if at all. Failure to obtain regulatory
approvals in a timely fashion or at all could have a material  adverse effect on
the Company.

    All of the Company's Quality Control Products, with the exception of Accurun
1(R),  are marketed  "for research use only," which do not require FDA premarket
clearance  or  approval,  and not for  diagnostic  uses,  which do  require  FDA
premarket clearance or approval. The labeling of these products limits their use
to research. It is possible, however, that some purchasers of these products may
use them for diagnostic  purposes  despite the Company's  intended use. In these
circumstances, the FDA could allege that these products should have been cleared
or approved  by the FDA prior to  marketing,  and  initiate  enforcement  action
against the Company, which could have a material adverse effect on the Company.

    Once  cleared or  approved,  medical  devices are subject to  pervasive  and
continuing  regulation  by  the  FDA,  including,   but  not  limited  to,  good
manufacturing  practices ("GMP")  regulations  governing testing,  control,  and
documentation; and reporting of adverse experiences with the use of the device.

                                       37



Ongoing  compliance  with GMP and other  applicable  regulatory  requirements is
monitored through periodic inspections. FDA regulations require agency clearance
or  approval  for  certain  changes  if they do or could  affect  the safety and
effectiveness of the device,  including,  for example,  new indications for use,
labeling  changes or changes in design or  manufacturing  methods.  In addition,
both before and after  clearance  or  approval,  medical  devices are subject to
certain  export and import  requirements  under the FDCA.  Product  labeling and
promotional  activities  are  subject  to  scrutiny  by the FDA and,  in certain
instances,  by the Federal  Trade  Commission.  Products  may be promoted by the
Company  only for their  approved  use.  Failure to comply  with these and other
regulatory  requirements  can result,  among other  consequences,  in failure to
obtain premarket approvals, withdrawal of approvals, total or partial suspension
of product  distribution,  injunctions,  civil penalties,  recall or seizures of
products and criminal prosecution.

    The Company  believes that its Quality  Control  Panels are not regulated by
the FDA because  they are not  intended  for  diagnostic  purposes.  The Company
believes  that its  Diagnostic  Components,  which  are  components  of in vitro
diagnostic products, may be subject to certain regulatory requirements under the
FDCA and other laws administered by the FDA, but do not require that the Company
obtain a premarket  approval or clearance.  There can be no assurance,  however,
that  the  FDA  would  agree  or  that  the  FDA  will  not  adopt  a  different
interpretation  of the FDCA or other  laws it  administers,  which  could have a
material adverse effect on the Company.

    Laws and regulations  affecting some of the Company's products are in effect
in many of the  countries in which the Company  markets or intends to market its
products.  These requirements vary from country to country. Member states of the
European  Economic Area (which is composed of the European Union members and the
European Free Trade Association  members) are in the process of adopting various
product and services  "Directives"  to address  essential  health,  safety,  and
environmental  requirements  associated with the subject  products and services.
The  "Directives"  cover both  quality  system  requirements  (ISO  Series  9000
Standards) and product and marketing  related  requirements.  In addition,  some
jurisdictions have requirements  related to marketing of the Company's products.
There can be no assurance that the Company will be able to obtain any regulatory
approvals  required to market its products on a timely basis,  or at all. Delays
in receipt of, or failure to receive  such  approvals,  or the failure to comply
with  regulatory  requirements  in  these  countries  or  states  could  lead to
compliance  action,  which could have a material adverse effect on the Company's
business, financial condition, or results of operations.

    The Company's  service-related business (clinical trials, infectious disease
testing,  and  contract  research)  is  subject  to  other  national  and  local
requirements.  The  Company's  facilities  are  subject to  review,  inspection,
licensure or accreditation by some states,  national professional  organizations
(College of  American  Pathologists),  and other  national  regulatory  agencies
(Health  Care  Financing  Administration).  Studies  to  evaluate  the safety or
effectiveness  of FDA regulated  products  (primarily  human and animal drugs or
biologics) must also be conducted in conformance with relevant FDA requirements,
including Good Laboratory Practice ("GLP") regulations, investigational new drug
or device  regulations,  Institutional  Review  Board  ("IRB")  regulations  and
informed consent regulations.

    CLIA prohibits  laboratories  from performing in vitro tests for the purpose
of  providing  information  for the  diagnosis,  prevention  or treatment of any
disease or  impairment  of, or the  assessment  of,  the health of human  beings
unless there is in effect for such laboratories a certificate issued by the U.S.
Department of Health and Human  Services  ("HHS")  applicable to the category of
examination or procedure performed.

    The Company  currently holds permits issued by HHS (CLIA  license),  Centers
for Disease Control and Prevention (Importation of Etiological Agents or Vectors
of  Human  Diseases),  the  U.S.  Department  of  Agriculture  (Importation  and
Transportation  of Controlled  Materials and Organisms and Vectors) and the U.S.
Nuclear  Regulatory  Commission (in vitro testing with byproduct  material under
general license, covering the use of certain radioimmunoassay test methods).

    The Company is also subject to government  regulation  under the Clean Water
Act, the Toxic  Substances  Control Act, the Resource  Conservation and Recovery
Act, the Atomic  Energy Act, and other  national,  state and local  restrictions
relating  to the  use  and  disposal  of  biohazardous,  radioactive  and  other
hazardous  substances  and  wastes.  The  Company  is an exempt  small  quantity
generator of hazardous waste

                                       38



and  has a U.S.  Environmental  Protection  Agency  identification  number.  The
Company is also registered with the U.S. Nuclear  Regulatory  Commission for use
of certain radioactive materials. All hazardous waste is manifested and disposed
of  properly.   The  Company  is  also  subject  to  various  state   regulatory
requirements governing the handling of and disposal of biohazardous, radioactive
and hazardous  wastes.  The Company has never been a party to any  environmental
proceeding.

    Internationally,  some of the  Company's  products are subject to additional
regulatory requirements,  which vary significantly from country to country. Each
country  in which the  Company's  products  and  services  are  offered  must be
evaluated independently to determine the country's particular  requirements.  In
foreign  countries,  the Company's  distributors  are generally  responsible for
obtaining any required government consents.

INTELLECTUAL PROPERTY

    None of the Company's Quality Control Products or Diagnostic Components have
been  patented.  The  Company  has  decided  to hold as  trade  secrets  current
technology  used to  prepare  Basematrix  and other  blood-based  products.  The
Company relies  primarily on a combination  of trade secrets and  non-disclosure
and confidentiality  agreements, and in certain limited circumstances,  patents,
to establish and protect its proprietary  rights in its technology and products.
There  can be no  assurance  that  others  will  not  independently  develop  or
otherwise acquire the same, similar or more advanced trade secrets and know-how.

    The Company has two United States  patents and,  jointly with UNC, has filed
three  series of United  States and  foreign  patent  applications  relating  to
compounds,  pharmaceutical  compositions  and therapeutic  methods in connection
with the Company's  drug  discovery  program at UNC. See "-- Services," and " --
Research and Development."

    The  Company  has no reason to believe  that its  products  and  proprietary
methods  infringe the  proprietary  rights of any other  party.  There can be no
assurance,  however,  that other parties will not assert  infringement claims in
the  future.  See "Risk  Factors --  Protection  of  Intellectual  Property  and
Proprietary Technology."

PROPERTIES

    The Company's corporate offices and manufacturing  facilities are located in
a two story, 22,500 square foot building in West Bridgewater, Massachusetts. The
Company  owns  and  operates  this   building.   The  Company   intends  to  use
approximately  $1  million  of the  proceeds  of this  Offering  to  expand  its
manufacturing   capacity  and  to  purchase  necessary  equipment  at  its  West
Bridgewater  site,  and  has  submitted  plans  to  local  authorities  for  the
development  of an additional  7,500 square feet,  primarily  for  manufacturing
purposes.  The Company  anticipates that these renovations will begin this year.
The Company  believes that  following  these  renovations,  its facility in West
Bridgewater  will be  sufficient  to meet  its  foreseeable  needs.  See "Use of
Proceeds."

    The Company leases its laboratory facilities in Rockville,  Maryland and New
Britain,  Connecticut. The Rockville facility contains 21,000 square feet and is
occupied  under a five-year  lease that is due to expire on June 30,  1997.  The
Company is currently  considering the exercise of its option to extend the lease
for an additional five years, as well as relocating its laboratory.  The Company
believes that there is sufficient space available in the Rockville  facility for
its current  needs.  The New Britain  facility has 15,000  square feet,  most of
which is dedicated to laboratory  space.  The lease is for five years and is due
to expire on July 30, 2000; the Company has an option to renew for an additional
five years.

EMPLOYEES


    As of October 23, 1996 the Company  employed 186  persons,  all of whom were
located in the United  States.  Seventy-seven  of these persons were employed in
West Bridgewater,  Massachusetts,  59 in New Britain, Connecticut, and 50 at the
Rockville,  Maryland  site.  None of the  Company's  employees  is  covered by a
collective bargaining agreement. The Company believes that it has a satisfactory
relationship with its employees.


                                       39



                                   MANAGEMENT

DIRECTORS AND EXECUTIVE OFFICERS

    The directors  and  executive  officers of the Company and their ages are as
follows:

<TABLE>
<CAPTION>
                  NAME                        AGE                       POSITION
                  ----                        ---                       --------
<S>                                           <C>     <C>
Richard T. Schumacher(1)                      46      President; Chief Executive Officer and
                              Chairman of the Board
Kevin W. Quinlan(2)                           46      Senior Vice President, Finance; Chief
                                                        Financial Officer; Treasurer and Director
Patricia E. Garrett, Ph.D.                    53      Senior Vice President, Regulatory Affairs &
                               Strategic Programs
Mark M. Manak, Ph.D.                          45      Senior Vice President, Research and
                                                        Development
Richard C. Tilton, Ph.D.                      60      Senior Vice President, Specialty Laboratory
                                                        Services
Barry M. Warren                               49      Senior Vice President, Sales & Marketing

Ronald V. DiPaolo, Ph.D.                      52      Vice President of Operations

Francis E. Capitanio(2)                       52      Director

Henry A. Malkasian(1)                         79      Director

Calvin A. Saravis(1)(2)                       66      Director

- - ---------------
(1)  Member of the Compensation Committee.

(2)  Member of the Audit Committee.
</TABLE>

    Mr.  Schumacher,  the founder of the Company,  has been the President  since
1986, and Chief Executive Officer and Chairman since 1992. Mr. Schumacher served
as the Director of Infectious Disease Services for Clinical Science  Laboratory,
a New England-based medical reference  laboratory,  from 1986 to 1988. From 1972
to 1985,  Mr.  Schumacher  was  employed  by the  Center for Blood  Research,  a
nonprofit medical research institute associated with Harvard Medical School. Mr.
Schumacher received a B.S. in zoology from the University of New Hampshire.

    Mr. Quinlan,  a Director of the Company since its founding,  has been Senior
Vice President,  Finance,  Treasurer,  and Chief Financial Officer since January
1993. From 1990 to December 1992, he was the Chief Financial Officer of ParcTec,
Inc. a New York-based leasing company.  Mr. Quinlan served as Vice President and
Assistant  Treasurer of American  Finance Group,  Inc. from 1981 to 1989 and was
employed  by Coopers & Lybrand  from 1975 to 1980.  Mr.  Quinlan is a  certified
public accountant and received a M.S. in accounting from Northeastern University
and a B.S. in economics from the University of New Hampshire.

    Dr. Garrett has been Senior Vice President,  Regulatory  Affairs & Strategic
Programs  since 1988.  From 1980 to 1987,  Dr.  Garrett  served as the Technical
Director of the Chemistry  Laboratory,  Department of Laboratory Medicine at the
Lahey Clinic Medical Center. Dr. Garrett earned her Ph.D. from the University of
Colorado and was a postdoctoral research associate at Harvard University, Oregon
State  University,  Massachusetts  Institute of Technology and the University of
British Columbia.

    Dr.  Manak has served as Senior Vice  President,  Research  and  Development
since 1992. From 1980 to 1992, he served as Senior Research Scientist, Molecular
Biology,  of Biotech  Research  Laboratories.  Dr. Manak  received his Ph.D.  in
biochemistry  from the  University of  Connecticut  and  completed  postdoctoral
research work in biochemistry/virology at Johns Hopkins University.

                                       40



    Dr.  Tilton  has  served  as Senior  Vice  President,  Specialty  Laboratory
Services  since  the  Company's   acquisition  of  BBI-North  American  Clinical
Laboratories,  Inc. in 1993 and was one of the  founders of  BBI-NACL,  where he
served as President  from 1989 to 1993. Dr. Tilton has 25 years of experience in
university hospital clinical microbiology laboratories and is board certified in
medical  and public  health  microbiology.  Dr.  Tilton  received  his Ph.D.  in
microbiology from the University of Massachusetts.

    Mr.  Warren has served as Senior Vice  President,  Sales &  Marketing  since
1993.  From 1985 to 1993,  Mr. Warren  served as Group  Director of Marketing of
Organon  Teknika,  a manufacturer  of infectious  disease  reagents.  Mr. Warren
received an M.A. in political  science from Loyola  University  of Chicago and a
B.A. from Loyola University.

    Dr.  DiPaolo has been Vice  President  of  Operations  since 1993.  Prior to
joining the Company, Dr. DiPaolo served as Vice President and General Manager of
the Biomedical Products Division of Collaborative  Research,  a medical research
products  company.  From  1975 to 1986 he was  employed  by DuPont  New  England
Nuclear,  an in vitro test kit  manufacturer.  Dr. DiPaolo received his Ph.D. in
biochemistry  from  Massachusetts  Institute of Technology  and later  completed
postdoctoral research at the Eunice Shriver Center in Waltham, Massachusetts.

    Mr.  Capitanio  has served as a Director  since  January  1986.  He has been
President,   Treasurer  and  Director  of  Diatech  Diagnostics  Inc.  (formerly
Immunotech  Corporation),  an in vitro  diagnostics  company and a wholly  owned
subsidiary of Healthcare  Technologies  Ltd., since 1980. Mr. Capitanio received
an  M.B.A.  from the Sloan  School of  Management,  Massachusetts  Institute  of
Technology and a B.S. in metallurgy from Massachusetts Institute of Technology.

    Mr.  Malkasian has served as a Director since the Company's  organization in
1978.  Mr.  Malkasian is a practicing  attorney-at-law  and a member of the firm
Malkasian & Budge in  Massachusetts.  He received  his J.D.  degree from Harvard
University School of Law and a B.A. degree from Clark University.

    Dr. Saravis has served as a Director since 1978. Since 1971, Dr. Saravis has
been a Senior Research Associate at the Mallory Institute of Pathology and since
1979 he has been a Senior Research Associate at the Cancer Research Institute --
New England Deaconess  Hospital.  Since 1984, Dr. Saravis has had an appointment
as an Associate  Professor of Surgery  (biochemistry)  at Harvard Medical School
and an Associate  Research Professor of Pathology at Boston University School of
Medicine. Dr. Saravis received his Ph.D. in immunology and serology from Rutgers
University.

    In August 1990 the Board of Directors  established a Compensation  Committee
currently composed of Messrs.  Schumacher,  Saravis and Malkasian. The functions
of the Compensation  Committee include  presentation and  recommendations to the
Board of  Directors  on  compensation  levels for  officers  and  directors  and
issuance of stock options to the Board of Directors, employees and affiliates.

    In  August  1990  the  Board of  Directors  established  an Audit  Committee
currently composed of Messrs.  Capitanio,  Quinlan and Saravis. The functions of
the  Audit  Committee  include  recommending  to  the  Board  of  Directors  the
engagement  of the  independent  accountants,  reviewing  the scope of  internal
controls and reviewing the implementation by management of recommendations  made
by the independent accountants.

    The  Company's  Board of Directors is divided into three  classes,  with the
classes being elected for staggered  three-year terms. At each annual meeting of
stockholders, directors will be elected to succeed those in the class whose term
then expires,  and each elected  director shall serve for a term expiring at the
third succeeding annual meeting of stockholders after such director's  election,
and until the  director's  successor is elected and qualified.  Thus,  directors
stand for election  only once in three years.  Executive  officers  serve at the
discretion of the Board of Directors.

DIRECTOR COMPENSATION


    Directors  of the  Company  do  not  receive  cash  compensation  for  their
services.  Each director is eligible to receive options to purchase Common Stock
under the  Company's  1987  Non-Qualified  Stock Option Plan.  As of October 23,
1996,  options to purchase an aggregate  of 249,750  shares have been granted to
directors  of the  Company  under  this Plan.  During  fiscal  1995,  options to
purchase  an  aggregate  of 15,000  shares of Common  Stock were  granted to the
Directors  as  follows:  5,000  shares  to Mr.  Capitanio,  5,000  shares to Mr.
Malkasian,  and  5,000  shares  to Dr.  Saravis  and no  shares  to  either  Mr.
Schumacher or Mr. Quinlan.


                                       41


EXECUTIVE COMPENSATION

    The following  table sets forth the  compensation  for the fiscal year ended
December 31, 1995 of each of the Chief Executive Officer and the six most highly
compensated  officers of the Company (the "Named Executive  Officers"),  none of
whom received any bonuses during the fiscal year ended December 31, 1995:


                           SUMMARY COMPENSATION TABLE
<TABLE>
<CAPTION>
                                                                                    ANNUAL COMPENSATION
                                                                                      FOR FISCAL 1995
                                                                                             OTHER ANNUAL
                         NAME AND PRINCIPAL POSITION                           SALARY($)    COMPENSATION($)
                         ---------------------------                           ---------    ---------------
<S>                                                                            <C>          <C>
Richard T. Schumacher.......................................................    $166,676      $ 2,008(1)
  President and Chief Executive Officer
Kevin W. Quinlan............................................................     120,615        1,650(2)
  Senior Vice President, Finance and Chief Financial Officer
Patricia E. Garrett, Ph.D. .................................................      92,353        1,650(2)
  Senior Vice President, Regulatory Affairs & Strategic Programs
Mark M. Manak, Ph.D. .......................................................     102,753          --
  Senior Vice President, Research & Development
Richard C. Tilton, Ph.D. ...................................................     111,924        6,000(3)
  Senior Vice President, Specialty Laboratory Services
Barry M. Warren.............................................................     113,454        1,500(2)
  Senior Vice President, Sales & Marketing
Ronald V. DiPaolo, Ph.D. ...................................................      86,614        1,500(2)
  Vice President of Operations


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

(1)  Consists of personal  usage of Company  vehicle,  and includes the value of
     premiums paid for a term life insurance policy.

(2) Consists of automobile allowance, discontinued as of March 31, 1995.

(3) Consists of automobile allowance.
</TABLE>

    The  following  table sets forth the  aggregate  number and value of options
exercisable  and  unexercisable  by the Named  Executive  Officers during fiscal
1995.  No stock  options  were  granted  to, or  exercised  by, any of the Named
Executive Officers in fiscal 1995.


                          FISCAL YEAR-END OPTION VALUES
<TABLE>
<CAPTION>

                                                       NUMBER OF SECURITIES      VALUE OF UNEXERCISED
                                                      UNDERLYING UNEXERCISED     IN-THE-MONEY OPTIONS
                                                      OPTIONS AT 12/31/95(#)      AT 12/31/95($)(1)
            NAME AND PRINCIPAL POSITION             EXERCISABLE/UNEXERCISABLE EXERCISABLE/UNEXERCISABLE
            ---------------------------             ---------------------------------------------------
<S>                                                  <C>                     <C>
   
Richard T. Schumacher ..............................   127,500         2,500  $ 924,750     $ 15,000
  President and Chief Executive Officer
Kevin W. Quinlan ...................................    58,000        10,000    374,750       60,000
  Senior Vice President, Finance and Chief
  Financial Officer
Patricia E. Garrett, Ph.D. .........................    41,250         1,250    313,500        5,000
  Senior Vice President, Regulatory Affairs &
  Strategic Programs
Mark M. Manak, Ph.D. ...............................    26,250         8,750    157,500       52,500
  Senior Vice President, Research & Development
Richard C. Tilton, Ph.D. ...........................    17,500        17,500     96,250       96,250
  Senior Vice President, Specialty Laboratory
  Services
Barry M. Warren ....................................     7,500         7,500     30,000       30,000
  Senior Vice President, Sales & Marketing
Ronald V. DiPaolo, Ph.D. ...........................    25,000         1,000    171,400        4,000
  Vice President of Operations


- - -----------------------
</TABLE>
(1)  There was no public  trading market for the Common Stock as of December 31,
     1995.  Accordingly,  these values have been  calculated on the basis of the
     initial public offering  price  of  $8.50  per  share,  less the applicable
     exercise price.
    
                                       42



EMPLOYMENT AGREEMENTS

    None of the Company's  employees are subject to employment  agreements  with
the Company.

STOCK PLANS


    1987  Non-Qualified   Stock  Option  Plan:  The  Company  adopted  the  1987
Non-Qualified  Stock  Option  Plan  (the  "Non-Qualified  Plan") to  provide  an
opportunity to employees,  officers,  directors and  consultants  employed by or
affiliated  with the Company or any of its  subsidiaries to acquire stock in the
Company, to provide increased  incentives to such persons to promote the success
of the  Company's  business and to encourage  such persons to become  affiliated
with the Company  through the granting of options to acquire its capital  stock.
Any  employee  of the  Company  or of a  subsidiary  of the  Company,  including
officers,  as well as directors of the Company and  consultants  or providers of
services to the Company,  are  eligible to receive  nonqualified  stock  options
under the Non-Qualified Plan. A total of 897,600 shares of Common Stock has been
reserved for issuance under the Non-Qualified Plan.

    The  Non-Qualified  Plan  is  required  to be  administered  by a  Committee
consisting of at least one member appointed by the Board of Directors, and after
the completion of this Offering,  consisting of at least two independent members
of  the  Board  of  Directors.  The  Committee  currently  consists  of  Richard
Schumacher,  Kevin Quinlan and Henry Malkasian.  The Committee has the authority
and discretion to determine those persons to whom options shall be granted under
the  Non-Qualified  Plan,  to determine  the number of shares to be granted,  to
establish  the terms and  conditions  upon which  options  may be  exercised  or
transferred,  to alter any restrictions or conditions on the options and to make
all other  determinations  necessary or desirable for the  administration of the
Non-Qualified   Plan.  The  exercise   price  for  options   granted  under  the
Non-Qualified Plan is determined by the Committee,  but is in no event less than
the par value of the Common Stock.  Options granted under the Non-Qualified Plan
continue  in  effect  for  such  period  as  the   Committee   determines.   The
Non-Qualified Plan terminates as of December 16, 1997.

   
   As of October 23, 1996, options to purchase 749,850 were outstanding pursuant
to the  Non-Qualified  Plan at  exercise  prices  ranging  from  $.25 to  $6.00,
including an aggregate of 249,750  shares to the  Company's  directors,  Richard
Schumacher, Kevin Quinlan, Francis Capitanio, Henry Malkasian, and Calvin
Saravis.
    

    Employee  Stock Option Plan:  The purpose of the Employee  Stock Option Plan
(the  "Employee  Plan") is to provide  increased  incentives  to  employees,  to
encourage new employees to become  affiliated  with the Company and to associate
more  closely the  interests  of such  persons  with those of the  Company.  The
Employee  Plan permits the issuance of options to purchase up to 750,000  shares
of Common Stock in the form of incentive stock options as defined in Section 422
of the  Internal  Revenue  Code of 1986,  as amended,  and  non-qualified  stock
options.  The Employee Plan is currently  administered by a Committee consisting
of at least  one  member  appointed  by the  Board of  Directors,  and after the
completion of this Offering,  shall consist of at least two independent  members
of the Board of Directors.  The exercise price of stock options is determined by
the Committee, but is in no event less than par value, and the exercise price of
incentive stock options may not be less than the fair market value of the Common
Stock on the date of grant  (or,  in the case of  holders  of 10% or more of the
outstanding  Common  Stock,  110% of the fair market  value on such  date).  The
Committee also determines the vesting schedule, number of shares and other terms
of the options. As of October 23, 1996,  options to purchase  184,537  shares of
Common  Stock at  exercise  prices  ranging  from  $6.00 to $8.50 per share were
outstanding under the Employee Plan.


COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

    The  Compensation  Committee  currently  consists of Messrs.  Schumacher and
Malkasian and Dr. Saravis,  each of whom has received options to purchase shares
of Common Stock. See "-- Director Compensation" and "-- Stock Plans."

LIMITATION OF OFFICERS' AND DIRECTORS' LIABILITY; INDEMNIFICATION AGREEMENTS

    The  Company's  Amended and  Restated  Articles of  Organization  eliminate,
subject to certain  exceptions,  the  personal  liability  of  directors  to the
Company or its  stockholders  for  monetary  damages for  breaches of  fiduciary
duties as directors. The Restated Articles do not provide for the elimination of
or any limitation on the personal  liability of a director for (i) any breach of
the director's duty of loyalty

                                       43



to the Company or its stockholders,  (ii) acts or omissions not in good faith or
which  involve  intentional  misconduct  or a knowing  violation  of law,  (iii)
certain unauthorized  dividends,  redemptions or distributions as provided under
Section 61 of the Massachusetts  Business Corporation Law, (iv) certain loans of
assets of the Company to any of its  officers  or  directors  as provided  under
Section 62 of the Massachusetts  Business Corporation Law or (v) any transaction
from which the director derived an improper personal benefit.  This provision of
the  Amended  and  Restated  Articles of  Organization  will limit the  remedies
available to a stockholder in the event of breaches of any director's  duties to
such stockholder or the Company.

    The Company's Amended and Restated Articles of Organization provide that the
Company  may,   either  in  its  By-laws  or  by   contract,   provide  for  the
indemnification  of  directors,  officers,  employees  and  agents,  by whomever
elected or appointed,  to the full extent permitted by law, as it may be amended
from time to time.


    The Company  intends to enter into  indemnification  agreements with each of
the directors and officers. The indemnification agreements will provide that the
Company will pay certain amounts incurred by a director or officer in connection
with any civil or  criminal  action or  proceeding  and  specifically  including
actions  by or  in  the  name  of  the  Company  (derivative  suits)  where  the
individual's  involvement  is by reason of the fact that he is or was a director
or officer.  Such  amounts  include,  to the maximum  extent  permitted  by law,
attorney's  fees,  judgments,  civil or criminal fines,  settlement  amounts and
other expenses customarily incurred in connection with legal proceedings.  Under
the  indemnification   agreements,  a  director  or  officer  will  not  receive
indemnification if he is found not to have acted in good faith in the reasonable
belief that his action was in the best interests of the Company.

                              CERTAIN TRANSACTIONS

    Registration  Rights.  The  Company  is a  party  to a  Registration  Rights
Agreement dated June 5, 1990, as amended (the "Registration Agreement"),  with G
& G Diagnostics  Limited Partnership I and G & G Diagnostics Limited Partnership
II  (together,  "G & G") pursuant to which G & G has certain  rights to have its
shares of Common Stock  registered  by the Company under the  Securities  Act. A
total of 366,670 shares of Common Stock (the "Registrable Shares") held by G & G
or subject to warrants  held by G & G may be registered  under the  Registration
Agreement.  If the Company  proposes to register any of its securities under the
Securities  Act,  either  for  its  own  account  or for the  account  of  other
securityholders, G & G is entitled to notice of the registration and is entitled
to include, at the Company's expense, the Registrable Shares therein,  provided,
among other conditions, that the underwriters have the right to limit the number
of such shares included in the registration.  In addition, G & G may require the
Company at its  expense on no more than two  occasions,  to file a  registration
statement under the Securities Act with respect to its Registrable  Shares,  and
the  Company  is  required  to use its best  efforts  to effect a  registration,
subject to certain  conditions and limitations.  Further,  G & G may require the
Company at its expense to register the Registrable  Shares on Form S-3 when such
form  becomes  available  to the  Company,  subject  to certain  conditions  and
limitations. G & G waived its respective registration rights for this Offering.
See "Principal Stockholders."


    Warrant  Exercise.  In May 1995, G & G Diagnostics  Limited  Partnership  II
exercised  warrants to purchase 40,000 shares of the Company's  Common Stock for
an exercise price of $2.50 per share or an aggregate amount of $100,000.

    Indemnification Contracts. The Company intends to enter into indemnification
agreements  with  each  of  its  directors  and  officers.  See  "Management  --
Limitation of Officers' and Directors' Liability; Indemnification Agreements."

                                       44



                             PRINCIPAL STOCKHOLDERS


    The  following  table sets forth certain  information  as of October 4, 1996
concerning  the beneficial  ownership of Common Stock by each director,  certain
executive  officers,  all executive  officers and directors as a group, and each
person  known by the  Company  to be the  beneficial  owner of 5% or more of the
Company's Common Stock. This information is based upon information received from
or on behalf of the named  individuals.  Unless  otherwise noted, the beneficial
owners  listed have sole  voting and  investment  power over the shares  listed.
<TABLE>
<CAPTION>
                                                                               PERCENTAGE OF OUTSTANDING SHARES
                                                                                    BENEFICIALLY OWNED(1)
                                                                                    ---------------------
                                                           NUMBER OF SHARES      BEFORE THE        AFTER THE
         NAME AND ADDRESS OF BENEFICIAL OWNER             BENEFICIALLY OWNED      OFFERING          OFFERING
         ------------------------------------             ------------------      --------          --------
<S>                                                       <C>                     <C>               <C>
5% Stockholders
  Irwin J. Gruverman(2)                                         412,920             14.71%             9.37%
   c/o G & G Diagnostics Limited Partnership I
   30 Ossipee Road
   Newton, MA 02164
  G & G Diagnostics Limited Partnership II(3)                   153,333              5.69              3.57
Directors and Senior Executives
  Richard T. Schumacher(4)(5)                                 1,013,957             35.89             22.91
  Henry A. Malkasian(4)(6)                                      311,510             11.54              7.24
  Kevin W. Quinlan(4)                                            93,100              3.37              2.13
  Patricia E. Garrett(4)                                         55,000              2.01              1.27
  Richard C. Tilton(4)                                           62,500              2.29              1.44
  Mark M. Manak(4)                                               55,500              2.03              1.28
  Barry M. Warren(4)                                             37,500              1.37                 *
  Ronald V. DiPaolo(4)                                           28,000              1.03                 *
  Calvin A. Saravis(4)                                           23,000                 *                 *
  Francis E. Capitanio(4)                                         8,750                 *                 *
  All Executive Officers and Directors as a group
   (10 Persons)(4)(5)(6)(7)                                   1,688,817             54.04             35.74

- - -------------------
  *  Less than 1% of the outstanding Common Stock.

(1)  The number of shares of Common Stock  outstanding  used in calculating  the
     percentage  for each  listed  person  includes  the shares of Common  Stock
     underlying options or warrants held by such person.

(2)  Includes  283,333  shares  held of  record  by three  limited  partnerships
     (including  G &  G  Diagnostics  Limited  Partnership  II),  of  which  Mr.
     Gruverman is the general partner,  10,000 shares subject to options held by
     Mr.  Gruverman and 106,670  shares subject to warrants held by one of three
     limited partnerships.

(3)  The address for G & G  Diagnostics  Limited  Partnership  II is the same as
     that for Mr. Gruverman. Mr. Gruverman is the beneficial owner of the shares
     of Common Stock held of record by G & G Limited Partnership II.


(4)  Includes the following  shares subject to options:  Mr. Capitanio -- 8,750,
     all of which are  exercisable  within 60 days after  October  4, 1996;  Dr.
     DiPaolo --  28,000,  25,000 of which are  exercisable  within 60 days after
     October 4, 1996;  Dr.  Garrett -- 45,000,  41,250 of which are  exercisable
     within 60 days  after  October 4, 1996;  Mr.  Quinlan -- 73,000,  58,000 of
     which are exercisable  within 60 days after October 4, 1996; Mr.  Malkasian
     -- 10,000,  all of which are  exercisable  within 60 days after  October 4,
     1996; Dr. Manak -- 37,500,  26,250 of which are exercisable  within 60 days
     after October 4, 1996; Dr. Saravis -- 23,000,  all of which are exercisable
     within 60 days after October 4, 1996; Mr. Schumacher --135,000,  127,500 of
     which are  exercisable  within 60 days after October 4, 1996; Dr. Tilton --
     37,500,  26,250 of which are  exercisable  within 60 days after  October 4,
     1996; and Mr. Warren -- 37,500,  7,500 of which are  exercisable  within 60
     days after October 4, 1996.

(5)  Includes 50,000 shares held of record by Mr. Schumacher's spouse and 20,000
     shares held of record by Mr.  Schumacher  as  custodian  for his  daughter.
     Excludes an  aggregate  of 144,067  shares held by other  relatives  of Mr.
     Schumacher as to which Mr. Schumacher disclaims beneficial ownership.


(6)  Includes 12,000 shares held of record by Mr.  Malkasian's son, 5,000 shares
     held by Mr.  Malkasian's  daughter,  53,850 shares held by Mr.  Malkasian's
     spouse and 30,000 shares held by Mr. Malkasian as trustee in trust for each
     of his son and his daughter.

(7)  Includes  4,000  shares held of record by Mr.  Manak as  custodian  for his
     daughter.
</TABLE>
                                       45



                          DESCRIPTION OF CAPITAL STOCK

    The authorized capital stock of the Company consists of 20,000,000 shares of
Common  Stock,  $0.01 par value  (referred  to herein  as  "Common  Stock")  and
1,000,000  shares of  Preferred  Stock,  $.01 par value  (referred  to herein as
"Preferred Stock").

COMMON STOCK


    As of  October  23,  1996,  there  were  2,690,064  shares  of Common  Stock
outstanding, held of record by approximately 130 stockholders.


    The  holders  of  Common  Stock  are  entitled  to one vote per share on all
matters  to be  voted  on by  stockholders  and are  entitled  to  receive  such
dividends,  if any,  as may be  declared  from  time to  time  by the  Board  of
Directors from funds legally available therefor.  The holders of Common Stock do
not have cumulative voting rights in the election of directors. Upon liquidation
or  dissolution  of the  Company,  the holders of Common  Stock are  entitled to
receive all assets  available for distribution to the  stockholders.  The Common
Stock  has  no  preemptive  or  other  subscription  rights,  and  there  are no
conversion  rights or redemption or sinking fund provisions with respect to such
shares. All of the shares of Common Stock are, and the shares to be sold in this
Offering will be, fully paid and nonassessable.

PREFERRED STOCK

    The  Company is  authorized  to issue up to  1,000,000  shares of  Preferred
Stock, none of which are outstanding. The Board of Directors may, without future
action of the  stockholders of the Company,  issue the Preferred Stock in one or
more classes or series and fix the rights and preferences thereof, including the
dividend rights,  dividend rates,  conversion  rights,  voting rights,  terms of
redemption  (including  sinking fund  provisions),  redemption  price or prices,
liquidation  preferences  and the  number  of shares  constituting  any class or
series, or the designations of such class or series. The voting and other rights
of the holders of Common Stock may be subject to and adversely  affected by, the
rights of holders of any Preferred Stock that may be issued in the future.

MASSACHUSETTS ANTI-TAKEOVER AND RELATED STATUTES

    Control  Share  Acquisition  Law.  Under  Chapter 110D of the  Massachusetts
General Laws governing "control share  acquisitions," any stockholder of certain
publicly-held  Massachusetts  corporations who acquires certain ranges of voting
power  --  one-fifth  or more but  less  than  one-third  of all  voting  power,
one-third or more but less than a majority of all voting power, or a majority or
more of all voting power -- may not (except in certain  transactions)  vote such
stock  unless the  stockholders  (excluding  the shares  held by the  interested
stockholders) of the corporation so authorize. As permitted by Chapter 110D, the
Company's  Amended and Restated  By-laws  include a provision which excludes the
Company from the applicability of that statute upon completion of the Offering.

    Business  Combination  Statute.  Chapter 110F of the  Massachusetts  General
Laws, entitled "Business Combinations with Interested  Shareholders," applies to
publicly-held  Massachusetts  corporations  with  200 or  more  stockholders  of
record. Generally,  this statute prohibits such Massachusetts  corporations from
engaging in a "business  combination"  with an  "interested  stockholder"  for a
period of three years  following the date of the transaction in which the person
becomes an interested  stockholder unless (a) the interested stockholder obtains
the  approval  of the  corporation's  board of  directors  prior to  becoming an
interested stockholder;  (b) the interested stockholder acquires at least 90% of
the voting stock of the corporation (excluding shares held by certain affiliates
of  the   corporation)   outstanding  at  the  time  he  becomes  an  interested
stockholder;  or (c) the business  combination  is both approved by the board of
directors and authorized at an annual or special  meeting of stockholders by the
holders  of  at  least  two-thirds  of  the  outstanding  voting  stock  of  the
corporation   (excluding  shares  held  by  the  interested   stockholder).   An
"interested stockholder" is a person who, together with

                                       46



affiliates and associates, owns (or at any time within the prior three years did
own) 5% or more of the outstanding voting stock of the Corporation.  A "business
combination" includes,  among other transactions,  a merger, stock or asset sale
and other transactions resulting in a financial benefit to the stockholder.  The
Amended  and  Restated  Articles of  Organization  and  Restated  By-laws of the
Company do not  expressly  provide for opting out of the  provisions  of Chapter
110F.  As a  result,  the  application  of this  statute  to the  Company  after
completion of this Offering  could  discourage or make it more difficult for any
person or group of  persons to attempt  to obtain  control of the  Company.  The
Company may at any time amend its Amended and Restated  Articles of Organization
or Restated  By-laws to elect not to be governed by Chapter  110F,  by a vote of
the holders of a majority of its voting stock,  but such an amendment  would not
be  effective  for twelve  months and would not apply to a business  combination
with any person who became an  interested  stockholder  prior to the date of the
amendment.


CERTAIN PROVISIONS OF THE COMPANY'S AMENDED AND RESTATED ARTICLES OF
ORGANIZATION AND AMENDED AND RESTATED BY-LAWS

    The Company's Amended and Restated Articles of Organization  include several
provisions  which may render more  difficult an unfriendly  tender offer,  proxy
contest,  merger or other change in control of the Company. See "Risk Factors --
Possible Adverse Effect of Certain Anti-takeover Provisions."

    Preferred  Stock. The Amended and Restated  Articles of Organization  permit
the Board of Directors to issue preferred stock in one or more series and to fix
the rights,  preferences,  privileges and restrictions thereof,  without further
vote or action by the stockholders. The issuance of preferred stock may have the
effect of delaying,  deferring or  preventing a change in control of the Company
and may  adversely  affect the voting and other  rights of the holders of Common
Stock. The Company currently has no plans to issue any preferred stock.


    Classification  of Board of Directors.  The Amended and Restated Articles of
Organization  provide for the classification of the Company's Board of Directors
into three  classes,  with the classes being  elected for  staggered  three-year
terms.  At each annual  meeting of  stockholders,  directors  will be elected to
succeed  those in the class whose term then expires,  and each elected  director
shall  serve for a term  expiring  at the third  succeeding  annual  meeting  of
stockholders after such director's election,  and until the director's successor
is elected and qualified.  Thus, directors stand for election only once in three
years.  This provision also restricts the ability of stockholders to enlarge the
Board of Directors. Changes in the number of Directors may be effected by a vote
of a  majority  of the  Continuing  Directors  (as  defined in the  Amended  and
Restated  Articles of  Organization)  or by the stockholders by vote of at least
80% of the shares of the Company's voting stock outstanding,  voting as a single
class. Under this provision, Directors may only be removed with or without cause
by the affirmative vote of the holders at least 80% of the combined voting power
of the outstanding  shares of the Company's  voting stock,  voting together as a
single class, or upon the vote of a majority of the Continuing Directors.


    Fair Price  Provision.  The Amended and  Restated  Articles of  Organization
contain a "Fair Price Provision" that is intended to protect stockholders who do
not tender their shares in a takeover bid by  guaranteeing  them a minimum price
for their shares in any subsequent  attempt to purchase such remaining shares at
a price lower than the acquiror's  original  acquisition  price.  The Fair Price
Provision  requires the  affirmative  vote of the holders of at least 80% of the
Company's  outstanding  voting stock for certain  business  combinations  with a
Related Person, unless specified price criteria and procedural  requirements are
met or the  business  combination  is approved  by a majority of the  Continuing
Directors.

    Indemnification Provision. The Amended and Restated Articles of Organization
provide that the Company may, either in its By-laws or by contract,  provide for
the  indemnification of directors,  officers,  employees and agents, by whomever
elected or appointed,  to the full extent permitted by applicable law, as it may
be amended from time to time.  See "--  Limitation of Officers'  and  Directors'
Liability; Indemnification Agreements."

TRANSFER AGENT AND REGISTRAR


    The Transfer Agent and Registrar for the Common Stock is American Securities
Transfer & Trust, Inc.


                                       47



                         SHARES ELIGIBLE FOR FUTURE SALE

    Prior to this  Offering,  there has been no  public  market  for the  Common
Stock.  Future sales of substantial amounts of Common Stock in the public market
could adversely affect the market price of the Common Stock.


    Upon completion of this Offering,  the Company will have 4,290,064 shares of
Common Stock outstanding  (4,530,064  shares if the Underwriters'  overallotment
option is exercised in full). Of those shares, the 1,600,000 shares sold in this
Offering  (1,840,000  shares  if  the  Underwriters'   overallotment  option  is
exercised in full) will be freely tradeable  without  restriction  (except as to
affiliates of the Company) or further registration under the Securities Act. The
remaining  2,690,064 shares of Common Stock were sold by the Company in reliance
on exemptions from the  registration  requirements of the Securities Act and are
"restricted securities" within the meaning of Rule 144 under the Securities Act.
All  of the  Company's  directors  and  executive  officers  and  certain  other
stockholders,  holding in the aggregate  2,555,244 shares of Common Stock,  have
agreed not to offer to sell,  sell or otherwise  dispose of any shares of Common
Stock  prior to the  expiration  of 180 days  from the date of this  Prospectus.
Oscar  Gruss & Son  Incorporated  may,  in its sole  discretion  and at any time
without prior  notice,  release all or any portion of the shares of Common Stock
subject to the lockup agreements.

    Beginning 91 days after the date of this Prospectus,  6,475 shares of Common
Stock will be  eligible  for sale in the  public  market  without  registration,
subject to certain  volume and other  limitations,  pursuant to Rule 144 or Rule
701 under the Securities Act of 1933, as amended (the  "Securities  Act") and an
additional  122,571 shares will be eligible for sale without such  restrictions.
Following the expiration of the 180-day lockup period,  an additional  1,643,197
shares of Common  Stock will be eligible for sale in the public  market  without
registration,  subject to certain volume and other limitations, pursuant to Rule
144 or Rule 701 under the Securities  Act and an additional  734,425 shares will
be eligible for sale without such  restrictions.  The remaining shares of Common
Stock held by existing stockholders will become eligible for sale under Rule 144
or otherwise at various times thereafter. All shares of Common Stock outstanding
on the date of this  Prospectus  will be eligible for sale to certain  qualified
institutional buyers in accordance with Rule 144A under the Securities Act.


    In  general,  under Rule 144 as  currently  in effect,  a person (or persons
whose shares are aggregated), including an affiliate of the Company, may sell in
the open market within any  three-month  period a number of shares that does not
exceed the  greater of (i) 1% of the  then-outstanding  shares of the  Company's
Common Stock or (ii) the average weekly  trading volume in the  over-the-counter
market  during the four  calendar  weeks  preceding  such sale,  provided that a
minimum of two years has elapsed between the later of the date of acquisition of
the securities  from the issuer or from an affiliate of the issuer.  The holding
period of shares of a non-affiliate for this purpose includes the holding period
of all prior non-affiliate holders,  provided that if an affiliate has held such
shares  at any  time,  the  holding  period  shall  commence  upon the sale to a
non-affiliate by the last affiliate to hold the shares. Sales under Rule 144 are
also subject to certain  limitations on the manner of sale,  notice  requirement
and  availability of current public  information  about the Company.  Under Rule
144(k),  a non-affiliate  who holds  restricted  securities and who has not been
affiliated with the Company during the three-month period preceding the proposed
sale thereof may sell such  securities  without regard to conditions  imposed by
Rule 144 if at least three years have elapsed  from the sale of such  securities
by the Company or any  affiliate.  The  Securities  and Exchange  Commission has
proposed  amendments to Rule 144,  including an amendment which would reduce the
waiting period to one year.

    Under Rule 701 of the Securities Act,  persons who purchased shares pursuant
to an employee stock purchase  program or upon exercise of options granted prior
to the  effective  date  of this  Offering  are  entitled,  subject  to  certain
conditions  and  limitations  of Rule 701, to sell such shares 90 days after the
effective date of this Offering in reliance upon Rule 144, without regard to the
holding  period  requirement  of Rule  144 and,  in the case of  non-affiliates,
without  compliance  with the public  information,  volume  limitation or notice
provisions of Rule 144.


    The Company  intends to register  under the Securities Act shortly after the
consummation  of the offering an  aggregate of 1,647,600  shares of Common Stock
issued or issuable  upon exercise of employee  stock  options  granted under the
Non-Qualified Plan and the Employee Plan, including 934,387 shares issuable upon
exercise of such options outstanding on the date of this Prospectus.  Two of the
Company's stockholders and the holder of a warrant to purchase Common Stock have
the right to cause the Company to register their shares under the Securities Act
and to  include  their  shares in certain  future  registrations  of  securities
effected by the Company under the Securities Act. An aggregate of 627,650 shares
of Common Stock, including 226,670 shares of Common Stock issuable upon exercise
of  outstanding  warrants  are covered by such  registration  rights.  See "Risk
Factors  --  Shares  Eligible  for  Future  Sale,"   "Certain   Transactions  --
Registration Rights" and "Principal Stockholders."


                                       48

                                  UNDERWRITING

    The  Underwriters  named below,  for whom Oscar Gruss & Son Incorporated and
Kaufman Bros., L.P. are acting as the Representatives  (the  "Representatives"),
have  severally  agreed,  subject to the terms and  conditions  contained in the
Underwriting  Agreement,  to  purchase  from the Company the number of shares of
Common Stock set forth opposite their respective names below.
<TABLE>
<CAPTION>
   
                                                                      NUMBER OF
                                NAME                                   SHARES
                                ----                                   ------
<S>                                                                    <C>
Oscar Gruss & Son Incorporated ..................................      712,500
Kaufman Bros., L.P. .............................................      712,500
Cruttenden Roth Incorporated ....................................       75,000 
Leerink Swann & Co. .............................................       50,000
Sands Brothers & Co., Ltd. ......................................       50,000 
                                                                     ---------
  TOTAL .........................................................    1,600,000
                                                                     =========

</TABLE>
    The  Underwriting  Agreement  provides  that the  several  Underwriters  are
obligated to purchase all of the 1,600,000 shares of Common Stock offered by the
Underwriters  hereby  (other  than  shares  which  may be  purchased  under  the
over-allotment  option) if any are purchased.  The Representatives  have advised
the  Company  that the  Underwriters  propose  to offer the shares to the public
initially  at the  public  offering  price set  forth on the cover  page of this
Prospectus,  that the Underwriters may allow to selected dealers a concession of
$  .36 per share and that such  dealers may reallow a  concession  of $ .10  per
share to certain other dealers.  After the initial public offering, the offering
price  and  the  concessions  may  be  changed  by  the   Representatives.   The
Representatives have informed the Company that the Underwriters do not intend to
confirm sales to any accounts over which they exercise discretionary authority.
    
    The Company has granted to the Underwriters an option, expiring at the close
of business  on the 30th day after the date of the  Underwriting  Agreement,  to
purchase up to 240,000  additional shares of Common Stock at the public offering
price less underwriting discounts and commissions, all as set forth on the cover
page of this Prospectus.  The Underwriters may exercise the option only to cover
over-allotments, if any, in the sale of shares of Common Stock in this Offering.
To the extent that the Underwriters  exercise the option,  each Underwriter will
become obligated,  subject to certain conditions,  to purchase approximately the
same  percentage  thereof  that the number of shares to be  purchased by each of
them as shown in the  foregoing  table bears to the  1,600,000  shares of Common
Stock offered hereby.
   
    The  Company  has  agreed to pay to the  Representatives  a  non-accountable
expense allowance of one percent of the gross proceeds of the Offering ($136,000
if the Underwriters'  over-allotment option is not exercised and $156,400 if the
Underwriters'  overallotment  option is exercised in full, at the initial public
offering  price of $8.50 per share),  of which $40,000 has been paid to date. If
the Offering is not consummated,  the Representatives will return to the Company
any unused  portion of the  pre-paid  expense  allowance.  The  Company has also
agreed to pay all expenses in connection  with  registering  or  qualifying  the
Common Stock  offered  hereby for sale under the laws of the states in which the
Common Stock is sold by the Underwriters (including expenses of counsel retained
for such purposes by the  Underwriters) as well as certain  expenses  associated
with information meetings.


    The Company has agreed to sell to the  Representatives,  or their designees,
warrants  (the  "Underwriters'  Warrants")  to  purchase  160,000  shares of the
Company's  Common Stock at an  aggregate  purchase  price of $160.  The exercise
price per Underwriters' Warrant, subject to anti-dilution  adjustment,  is equal
to 135% of the public  offering price per share of Common Stock offered  hereby.
The Underwriters' Warrants expire on the fifth anniversary of the effective date
of the Offering.  The Underwriters' Warrants may not be transferred or exercised
for one year from the date of this Prospectus,  except for transfers to officers
of the  Representatives  or members of the  underwriting or selling group and/or
their officers or
    

                                       49




partners,  if any. The  Underwriters'  Warrants  become  exercisable  during the
four-year  period  commencing  one year  from the date of this  Prospectus  (the
"Warrant  Exercise Term").  During the Warrant Exercise Term, the holders of the
Underwriters'  Warrants are given,  at nominal cost,  the  opportunity to profit
from an increase in the market price of the Company's  Common Stock. The Company
has granted the  Representatives  certain  demand and  "piggyback"  registration
rights with respect to the Underwriters'  Warrants.  Demand  registration rights
will expire five years from the effective date of the Offering,  and the Company
shall be required to effect such registration on one occasion only.  "Piggyback"
registration  rights will  terminate  seven years from the effective date of the
Offering.


    Except as set forth below,  the Company,  its  officers and  directors,  and
certain of its  stockholders,  who will hold an aggregate  of  2,555,244  shares
after this  Offering,  have agreed that they will not,  directly or  indirectly,
offer,  sell,  offer to sell,  contract to sell, grant any option to purchase or
otherwise  sell or dispose of any shares of Common Stock or other  capital stock
of  the  Company  or  any  securities   convertible   into,  or  exercisable  or
exchangeable  for,  any  shares of Common  Stock or other  capital  stock of the
Company for a period of 180 days after the date of this  Prospectus  without the
prior  written  consent  of Oscar  Gruss & Son  Incorporated  on  behalf  of the
Underwriters.  Oscar Gruss & Son Incorporated may, in its sole discretion and at
any time  without  prior  notice,  release  all or any  portion of the shares of
Common Stock subject to these "lock-up" agreements.


    Prior to this Offering,  there has not been any public market for the Common
Stock.  Consequently,  the initial  public  offering  price of the Common  Stock
offered hereby was determined through  negotiations  between the Company and the
Representatives.  Among the factors  considered in making such determination was
the prevailing market conditions, the Company's fiscal and operating history and
condition,  the  Company's  prospects  and the  prospects of its  industry,  the
management  of the Company,  the market price for  securities  for  companies in
businesses  similar to that of the Company and the recent  trading  activity and
prices of  shares  of common  stock on the  Nasdaq  National  Market.  See "Risk
Factors -- No Assurance of Public Market; Volatility of Stock Price."


    Kaufman Bros.,  L.P. became  registered as a broker-dealer  in July 1995 and
has participated in a limited number of public offerings as an underwriter.  See
"Risk Factors -- Lack of Underwriting History."


    The  Company  has  agreed to  indemnify  the  Underwriters  against  certain
liabilities, including liabilities under the Securities Act.

                                  LEGAL MATTERS

    Certain legal  matters in connection  with this Offering will be passed upon
for the  Company  by  Brown,  Rudnick,  Freed & Gesmer,  Boston,  Massachusetts.
Certain legal matters in connection with the Common Stock offered hereby will be
passed upon for the Underwriters by Fulbright & Jaworski  L.L.P.,  New York, New
York. A member of Brown,  Rudnick,  Freed & Gesmer,  counsel to the Company,  is
Clerk and is the owner of 12,000 shares of the Company's Common Stock.

                                     EXPERTS

    The consolidated  balance sheets of Boston Biomedica,  Inc. and Subsidiaries
as of December 31, 1994 and 1995 and the consolidated  statements of operations,
stockholders'  equity,  and cash flows for each of the three years in the period
ended December 31, 1995, included in this prospectus,  have been included herein
in reliance on the report of Coopers & Lybrand L.L.P.,  independent accountants,
given on the authority of that firm as experts in accounting and auditing.

                             ADDITIONAL INFORMATION

    The Company  has filed with the  Securities  and  Exchange  Commission  (the
"Commission"), Washington, D.C. 20549, a Registration Statement on Form S-1 (the
"Registration  Statement")  under the  Securities Act with respect to the Common
Stock offered  hereby.  This  Prospectus does not contain all of the information
set forth in the Registration  Statement and the exhibits and schedules thereto.
For


                                       50


further information with respect to the Company and the Common Stock,  reference
is made to the  Registration  Statement and the exhibits and schedules  thereto.
Statements  contained in this  Prospectus  as to the contents of any contract or
other  document are not  necessarily  complete and, in each instance  where such
contract  or  document  is filed as an  exhibit to the  Registration  Statement,
reference is made to the copy of such  contract or document  filed as an exhibit
to the  Registration  Statement,  each such  statement  being  qualified  in all
respects  by  such  reference.  A copy  of  the  Registration  Statement  may be
inspected  without  charge at the offices of the Commission at 450 Fifth Street,
N.W.,  Washington,  D.C. 20549, and at the Commission's regional offices located
at Seven World Trade Center,  13th Floor,  New York, New York 10048,  and at 500
West Madison Street,  Northwestern Atrium Center, Suite 1400, Chicago,  Illinois
60661-2511.  Copies of materials can also be obtained at  prescribed  rates from
the  Public  Reference  Section of the  Commission  at 450 Fifth  Street,  N.W.,
Washington,  D.C. 20549.  The Commission  maintains a World Wide Web site on the
Internet at http://www.sec.gov that contains registration  statements,  reports,
proxy and information  statements and other  information  regarding  registrants
that file electronically with the Commission.

    The  Company  intends  to  distribute  to its  stockholders  annual  reports
containing   consolidated   financial  statements  audited  by  its  independent
accountants  and will make available  copies of quarterly  reports for the first
three quarters of each fiscal year containing unaudited  consolidated  financial
information.



                                       51







                    BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
                       INDEX TO FINANCIAL STATEMENTS


<TABLE>
<CAPTION>
                                                                                             PAGE
                                                                                             ----
 <S>                                                                                        <C>
 Report of Coopers & Lybrand L.L.P., Independent Accountants                                  F-2

 Consolidated  Balance  Sheets as of December 31, 1994 and 1995 and June
  30, 1996 (unaudited)                                                                        F-3

 Consolidated  Statements of Operations  for the years ended  December 31, 1993,
  1994, and 1995 and for the six months ended June 30, 1995 (unaudited) and June
  30, 1996 (unaudited) F-4

 Consolidated  Statements of  Stockholders'  Equity for the years ended December
   31, 1993, 1994, and 1995 and for the six months ended June
   30, 1996 (unaudited)                                                                       F-5

 Consolidated  Statements  of Cash Flows for the years ended  December 31, 1993,
   1994, and 1995 and for the six months ended June 30, 1995
   (unaudited) and June 30, 1996 (unaudited)                                                  F-6

 Notes to Consolidated Financial Statements                                                   F-7
</TABLE>

                                      F-1






                     REPORT OF INDEPENDENT ACCOUNTANTS


To the Board of Directors and Stockholders of BOSTON BIOMEDICA, INC.:

    We have  audited  the  accompanying  consolidated  balance  sheets of Boston
Biomedica,  Inc.  and  Subsidiaries  as of  December  31,  1994 and 1995 and the
related  consolidated  statements of operations,  stockholders'  equity and cash
flows for each of the three years in the period 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 audits.

    We conducted  our audits 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 audits provide 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 Boston
Biomedica,  Inc.  and  Subsidiaries  as of  December  31,  1994 and 1995 and the
results of their  operations and their cash flows for each of the three years in
the period  ended  December  31,  1995 in  conformity  with  generally  accepted
accounting principles.



                                            COOPERS & LYBRAND L.L.P.



Boston, Massachusetts
March 12, 1996,  except as to the information in the first paragraph of Note 11,
 for which the date is September 10, 1996


                                    F-2





                    BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
                        CONSOLIDATED BALANCE SHEETS


<TABLE>
<CAPTION>
                                                                     DECEMBER 31,               JUNE 30, 1996
                                                                     ------------               -------------
                                                                   1994         1995         ACTUAL      PRO FORMA
                                                                   ----         ----         ------      ---------
                                                                                                 (UNAUDITED)
<S>                                                            <C>           <C>          <C>           <C>
                                                       ASSETS
CURRENT ASSETS:
   Cash                                                        $    89,129   $   11,463   $    10,548   $    10,548
   Accounts receivable, less allowances of $94,723 in 1994,
     $142,372 in 1995 and $133,579 in 1996                       2,259,842    3,075,870     2,866,401     2,866,401
   Inventories (Notes 1 & 3)                                     3,609,516    3,676,851     3,865,219     3,865,219
   Prepaid expense and other                                       156,117      254,199       294,646       294,646
   Deferred income taxes (Note 7)                                  101,880      110,766       213,538       213,538
                                                                ----------    ---------    ----------    ----------
     Total current assets                                        6,216,484    7,129,149     7,250,352     7,250,352
                                                                ----------    ---------    ----------    ----------
Property and equipment, net (Notes 1 & 4)                        1,724,420    2,614,982     2,625,117     2,625,117

OTHER ASSETS:
   Notes receivable and other                                       22,079       83,422        79,037        79,037
   Goodwill and other intangibles, net (Notes 1 & 2)               112,521      100,820        92,777        92,777
                                                                ----------    ---------    ----------    ----------
                                                                   134,600      184,242       171,814       171,814
                                                                ----------    ---------    ----------    ----------
     TOTAL ASSETS                                              $ 8,075,504   $9,928,373   $10,047,283   $10,047,283
                                                               ===========   ==========   ===========   ===========

                                         LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
   Current maturities of long term debt (Note 6)               $   242,006   $  436,509   $   490,126   $   490,126
   Accounts payable                                                787,406      745,216       815,946       815,946
   Accrued compensation                                            361,911      395,755       488,223       488,223
   Other accrued expenses                                          139,052      199,334       127,712       127,712
   Deferred revenue                                                --           523,401       831,244       831,244
                                                                ----------    ---------    ----------    ----------
     Total current liabilities                                   1,530,375    2,300,215     2,753,251     2,753,251
                                                                ----------    ---------    ----------    ----------
LONG-TERM LIABILITIES:
   Long-term debt, less current maturities (Note 6)              3,179,526    4,215,501     2,797,581     2,797,581
   Deferred rent                                                   186,860      141,068       107,832       107,832
   Deferred income taxes (Note 7)                                  137,520       84,641       157,899       157,899

COMMITMENTS AND CONTINGENCIES (Note 8)

REDEEMABLE COMMON STOCK (Note 11)
   $.01 par value; 117,647 shares authorized, issued and
     outstanding                                                   --            --           898,503       --

STOCKHOLDERS' EQUITY (Note 10):

    Common stock, $.01 par value; authorized 15,000,000 shares in 1994, 1995 and
     1996;  issued and outstanding  2,578,865 in 1994; issued 2,640,417 in 1995;
     issued and outstanding 2,572,417 in 1996 actual and
     2,690,064 pro forma                                            25,789       26,404        25,724        26,901
   Additional paid-in capital                                    2,612,500    2,798,620     2,717,700     3,615,026
   Retained earnings                                               402,934      505,924       588,793       588,793
                                                                ----------    ---------    ----------    ----------
                                                                 3,041,223    3,330,948     3,332,217     4,230,720
   Less treasury stock, at cost -- 80,000 shares                   --          (144,000)      --            --
                                                                ----------    ---------    ----------    ----------
     Total stockholders' equity                                  3,041,223    3,186,948     3,332,217     4,230,720
                                                                ----------    ---------    ----------    ----------
     TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                $ 8,075,504   $9,928,373   $10,047,283   $10,047,283
                                                               ===========   ==========   ===========   ===========
</TABLE>


       The accompanying notes are an integral part of these consolidated
                              financial statements

                                       F-3



                     BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF OPERATIONS



<TABLE>
<CAPTION>
                                                         YEARS ENDED DECEMBER 31,           SIX MONTHS ENDED JUNE 30,
                                                         ------------------------           -------------------------
                                                     1993          1994          1995          1995          1996
                                                     ----          ----          ----          ----          ----
                                                                                                   (UNAUDITED)
<S>                                              <C>            <C>           <C>           <C>           <C>
REVENUE:
   Product sales                                 $ 3,942,328    $ 5,981,378   $ 6,621,631   $ 3,024,629   $ 3,945,759
   Services                                        5,214,688      4,741,376     5,649,099     2,539,851     2,982,624
                                                  ----------      ---------    ----------    ----------    ----------
     Total revenue                                 9,157,016     10,722,754    12,270,730     5,564,480     6,928,383

COSTS AND EXPENSES:
   Cost of product sales                           2,087,771      3,194,217     3,564,241     1,646,594     2,006,833
   Cost of services                                3,965,154      3,415,777     4,167,625     1,960,315     2,249,610
   Research and development                          278,859        469,358       375,712       159,035       361,619
   Selling and marketing                             894,202      1,191,573     1,339,792       637,567       915,289
   General and administrative                      1,619,331      2,047,256     2,315,814     1,056,590     1,088,448
                                                  ----------      ---------    ----------    ----------    ----------
       Total operating costs and expenses          8,845,317     10,318,181    11,763,184     5,460,101     6,621,799
                                                  ----------      ---------    ----------    ----------    ----------
       Income from operations                        311,699        404,573       507,546       104,379       306,584
Interest expense, net                                178,640        243,694       335,899       164,569       168,469
                                                  ----------      ---------    ----------    ----------    ----------
       Income (loss) before income taxes and
        extraordinary item                           133,059        160,879       171,647       (60,190)      138,115
(Provision) benefit (for) from income taxes
  (Notes 1 & 7)                                      (40,473)       (64,351)      (68,657)       24,034       (55,246)
                                                  ----------      ---------    ----------    ----------    ----------
       Income (loss) before extraordinary item        92,586         96,528       102,990       (36,156)       82,869
                                                  ----------      ---------    ----------    ----------    ----------
Extraordinary item-gain on elimination of debt
  (Notes 6 & 7), net of income taxes of $33,157       49,736        --            --            --            --
                                                  ----------      ---------    ----------    ----------    ----------
       Net income (loss)                         $    142,322   $     96,528  $    102,990  $   (36,156)  $     82,869
                                                 ============   ============  ============  ============   ===========
Income (loss) per share:
       Before extraordinary gain                 $      0.04    $      0.04   $      0.04   $     (0.01)  $      0.03
       Extraordinary gain                               0.02        --            --            --            --
                                                  ----------      ---------    ----------    ----------    ----------
       Net income (loss)                         $      0.06    $      0.04   $      0.04   $     (0.01)  $      0.03
                                                 ============   ===========   ===========   ============   ==========
Weighted average common and common equivalent
  shares outstanding                               2,437,725      2,587,137     3,151,477     2,597,590     3,252,643
                                                 ============   ===========   ===========   ===========    ==========
</TABLE>


       The accompanying notes are an integral part of these consolidated
                              financial statements

                                       F-4



                    BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
           CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY



<TABLE>
<CAPTION>
                                                    COMMON STOCK
                                                    ------------
                                                                         ADDITIONAL                                  TOTAL
                                                             $.01 PAR      PAID-IN       RETAINED     TREASURY   STOCKHOLDERS'
                                                 SHARES       VALUE        CAPITAL       EARNINGS      STOCK         EQUITY
                                                 ------       -----        -------       --------      -----         ------
<S>                                            <C>          <C>          <C>           <C>            <C>         <C>
BALANCE, December 31, 1992                      2,280,040   $   22,800   $ 1,635,830   $   164,084      --        $ 1,822,714
  Issuance of common stock                        201,298        2,013       711,318       --           --            713,331
  Stock options and warrants exercised             33,000          330        65,420       --           --             65,750
  Conversion of note payable                       10,690          107        17,532       --           --             17,639
  Net income                                       --           --           --            142,322      --            142,322
                                               ----------    ---------    ----------    ----------    --------     ----------
BALANCE, December 31, 1993                      2,525,028       25,250     2,430,100       306,406      --          2,761,756
  Issuance of common stock                         29,862          299       139,403       --           --            139,702
  Stock options and warrants exercised             23,975          240        30,197       --           --             30,437
  Tax benefit of stock options exercised           --           --            12,800       --           --             12,800
  Net income                                       --           --           --             96,528      --             96,528
                                               ----------    ---------    ----------    ----------    --------     ----------
BALANCE, December 31, 1994                      2,578,865       25,789     2,612,500       402,934      --          3,041,223
  Issuance of common stock                          8,535           85        58,160       --           --             58,245
  Stock options and warrants exercised             47,200          472       117,068       --           --            117,540
  Conversion of note payable                        5,817           58         9,542       --           --              9,600
  Treasury stock purchased -- 80,000 shares        --           --           --            --        $ (144,000)     (144,000)
  Tax benefit of stock options exercised           --           --             1,350       --           --              1,350
  Net income                                       --           --           --            102,990      --            102,990
                                               ----------    ---------    ----------    ----------    --------     ----------
BALANCE, December 31, 1995                      2,640,417       26,404     2,798,620       505,924    (144,000)     3,186,948
  Stock options and warrants exercised
   (unaudited)                                     12,000          120        62,280       --           --             62,400
  Issuance of treasury stock -- 80,000 shares
   (unaudited)                                    (80,000)        (800)     (143,200)      --          144,000        --
  Net income (unaudited)                           --           --           --             82,869      --             82,869
                                               ----------    ---------    ----------    ----------    --------     ----------
BALANCE, June 30, 1996 (unaudited)              2,572,417   $   25,724   $ 2,717,700   $   588,793      --        $ 3,332,217
                                               ==========   ==========   ===========   ===========    ========    ===========
</TABLE>


       The accompanying notes are an integral part of these consolidated
                              financial statements

                                       F-5




                     BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS


<TABLE>
<CAPTION>
                                                           YEARS ENDED DECEMBER 31,          SIX MONTHS ENDED JUNE 30,
                                                           ------------------------          -------------------------
                                                        1993         1994          1995          1995          1996
                                                        ----         ----          ----          ----          ----
                                                                                                     (UNAUDITED)
<S>                                                 <C>           <C>          <C>           <C>            <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)                                   $   142,322   $   96,528  $    102,990  $    (36,156)  $     82,869
Adjustments  to  reconcile  net income  (loss)
 to net cash (used in) provided by
  operating activities:
   Depreciation and amortization                        301,004      360,512       441,356       202,693        280,426
   Provision for doubtful accounts                       22,956      102,099       181,084        53,643         77,145
   Deferred rent                                         99,708        5,908       (45,792)      (12,556)       (33,236)
   Deferred income taxes                                 42,323      (42,798)      (61,765)      (74,809)       (29,514)
   Tax benefit of stock options exercised               --            12,800         1,350       --             --
   Extraordinary item-gain on elimination of debt       (49,736)      --           --            --             --

Changes in operating assets and liabilities:
   Accounts receivable                                 (215,270)    (529,157)     (997,112)       11,403        132,324
   Note receivable and other assets                     (17,002)      (3,720)      (61,343)      (12,962)         4,385
   Inventories                                         (950,715)    (567,420)      (67,335)       77,857       (188,368)
   Prepaid expenses                                      25,410       (3,500)      (98,082)      (79,496)       (40,447)
   Accounts payable                                      11,875      (86,130)      (42,190)       35,834         70,730
   Accrued expenses                                     160,021      100,767        94,126       (60,639)        20,846
   Deferred revenue                                     --            --           523,401       --             307,843
                                                     ----------    ---------    ----------    ----------     ----------
       Net cash (used in) provided by operating
        activities                                     (427,104)    (554,111)      (29,312)      104,812        685,003
                                                     ----------    ---------    ----------    ----------     ----------
CASH FLOWS FOR INVESTING ACTIVITIES:
   Additions to property and equipment                 (460,591)    (404,639)   (1,316,217)     (215,542)      (282,518)
   Purchase of intangible assets                        --            --            (4,000)      --             --
   Net assets of acquisitions (net of cash
     acquired)                                         (389,703)      --           --            --             --
                                                     ----------    ---------    ----------    ----------     ----------
       Net cash used in investing activities           (850,294)    (404,639)   (1,320,217)     (215,542)      (282,518)
                                                     ----------    ---------    ----------    ----------     ----------
CASH FLOWS FOR FINANCING ACTIVITIES:
   Proceeds from notes payable                        1,107,392    1,734,425     1,517,867       191,990        226,300
   Proceeds from redeemable common stock, net           --            --           --            --             898,503
   Proceeds of common stock issued, net                 765,081      170,139       175,785       103,126         62,400
   Repayments of long-term debt                        (613,199)    (887,989)     (277,789)      --          (1,590,603)
   Purchase of treasury stock                           --            --          (144,000)     (144,000)       --
                                                     ----------    ---------    ----------    ----------     ----------
       Net cash (used in) provided by financing
        activities                                    1,259,274    1,016,575     1,271,863       151,116       (403,400)
                                                     ----------    ---------    ----------    ----------     ----------
(DECREASE) INCREASE IN CASH:                            (18,124)      57,825       (77,666)       40,386           (915)
   Cash, beginning of period                             49,428       31,304        89,129        89,129         11,463
                                                     ----------    ---------    ----------    ----------     ----------
   Cash, end of period                              $    31,304  $    89,129  $     11,463  $    129,515   $     10,548
                                                    ===========   ==========   ===========  ============    ===========

SUPPLEMENTAL DISCLOSURES OF NONCASH
  ACTIVITIES:
   Conversion of note payable to common stock       $    17,639      --       $      9,600  $      9,600       --

SUPPLEMENTAL INFORMATION:
   Income taxes paid                                $    10,689  $    33,718  $    168,994  $    129,100    $     85,000
   Interest paid                                    $   163,831  $   254,133  $    331,495  $    163,735    $   178,328
</TABLE>

       The accompanying notes are an integral part of these consolidated
                              financial statements

                                       F-6



                    BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
     (INFORMATION         AS OF JUNE 30, 1996 AND FOR THE SIX MONTHS  ENDED JUNE
                          30, 1996 AND 1995 IS UNAUDITED.)

(1) BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES

    Boston Biomedica,  Inc. ("BBI") and Subsidiaries  (together,  the "Company")
provide infectious disease diagnostic products,  contract research and specialty
infectious  disease  testing  services  to  the  in-vitro  diagnostic  industry,
government  agencies,  blood banks,  hospitals  and other health care  providers
worldwide.

    Significant  accounting  policies  followed  in  the  preparation  of  these
consolidated financial statements are as follows:

 (i) Principles of Consolidation

    The consolidated  financial  statements  include the accounts of BBI and its
wholly-owned  subsidiaries,  Biotech Research  Laboratories,  Inc.  ("BTRL") and
BBI-North American Clinical  Laboratories,  Inc.  ("BBI-NACL").  All significant
intercompany   accounts   and   transactions   have  been   eliminated   in  the
consolidation.

 (ii) Reclassification

    Certain amounts included in the prior year's financial  statements have been
reclassified to conform to the current presentation.

 (iii) Use of Significant Estimates

    To prepare the financial  statements in conformity  with generally  accepted
accounting principles,  management is required to make estimates and assumptions
that affect 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 revenues and expenses during the reporting  period.  In
particular,   the  Company   records   reserves  for  estimates   regarding  the
collectability  of accounts  receivable.  Actual  results  could differ from the
estimates and assumptions used by management.

 (iv) Revenue Recognition

    Product  revenues are  recognized as sales upon shipment of the products or,
for  specific  orders at the request of the  customer,  on a bill and hold basis
after completion of manufacture.  All bill and hold  transactions meet specified
revenue  recognition  criteria which include normal billing,  credit and payment
terms,  and  transfer to the  customers  of all risks and rewards of  ownership.
Accounts  receivable  as of December 31, 1995 and June 30, 1996 include bill and
hold  receivables  of $179,000  and  $85,000,  respectively.  There were no such
receivables as of December 31, 1993 and 1994.

    The Company periodically enters into barter transactions whereby the Company
exchanges  inventory for testing  services.  Revenue on these  transactions  are
recognized  when both the products  have been  shipped and the testing  services
have been  completed and are recorded at the estimated  fair market value of the
inventory based upon standard  Company prices.  The revenue  recognized on these
transactions  for the years ended  December 31, 1993,  1994 and 1995 and for the
six  months  ended  June 30,  1995 and 1996  was  $30,000,  $192,000,  $213,000,
$126,000 and $191,000, respectively.

    Services are  recognized  as revenue upon  completion of tests for specialty
laboratory services.


    Revenue under long-term contracts, including funded research and development
contracts,  is recorded under the percentage of completion method, wherein costs
plus  profit is recorded  as service  revenue and billed  monthly as the work is
performed.  Certain  customers  make advance  payments  that are deferred  until
revenue  recognition  is  appropriate.  Unbilled  amounts for fee  retainage are
included in accounts receivable at


                                    F-7


                  BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
         NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (CONTINUED)
  (INFORMATION         AS OF JUNE 30, 1996 AND FOR THE SIX MONTHS ENDED JUNE 30,
                       1996 AND 1995 IS UNAUDITED.)

(1) BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)


December 31, 1994, 1995, and June 30, 1996, and are immaterial. When the current
contract estimates indicate a loss,  provision is made for the total anticipated
loss. The Company does not believe there are any material  collectability issues
associated with these receivables.

    Total  revenue  related to funded  research and  development  contracts  was
approximately  $1,721,000,  $660,000,  $728,000,  $278,000  and $598,000 for the
years ended  December 31, 1993,  1994 and 1995 and for the six months ended June
30, 1995 and 1996,  respectively.  Total  contract costs  associated  with these
agreements  were  approximately  $1,392,000,  $511,000,  $575,000,  $219,000 and
$553,000 for the years ended December 1993, 1994 and 1995 and for the six months
ended June 30, 1995 and 1996, respectively.


 (v) Research and Development Costs

    Research and development costs are expensed as incurred.

 (vi) Inventories

    Inventories are stated at the lower of average cost or net realizable  value
and include material, labor and manufacturing overhead.

 (vii) Property and Equipment

    Property and equipment are stated at cost. For financial reporting purposes,
depreciation  is  recognized  using  accelerated  and   straight-line   methods,
allocating the cost of the assets over their estimated useful lives ranging from
five years to ten years for certain manufacturing and laboratory equipment,  and
fifteen years for the building.  Upon  retirement or sale,  the cost and related
accumulated  depreciation of the asset are removed from the books. Any resulting
gain or loss is credited or charged to income.

 (viii) Goodwill and Intangibles

    Goodwill  results from excess of the purchase  prices over the net assets of
BTRL and BBI-NACL  acquired  and is amortized on a straight  line basis over ten
years.   Other  intangibles   primarily  consist  of  patents,   licenses,   and
intellectual property rights and are amortized over five to ten years.

 (ix) Income Taxes

    The Company  utilizes the liability  method of accounting  for income taxes.
Under the liability  method,  deferred  taxes arise from  temporary  differences
between the financial  statement and tax bases of assets and  liabilities  using
enacted tax rates in effect in the years in which the  differences  are expected
to reverse.  A valuation  allowance  is provided for net deferred tax assets if,
based on the weighted available  evidence,  it is more likely than not that some
or all of the  deferred  tax  assets  will  not be  realized.  Tax  credits  are
recognized when realized using the flow through method of accounting.

 (x) Concentration of Credit Risk

    Financial   instruments   which   potentially   subject   the   Company   to
concentrations of credit risk are principally cash and accounts receivable.  The
Company places its cash in federally  chartered banks,  each of which is insured
up to $100,000 by the Federal Deposit  Insurance  Corporation.  Concentration of
credit risk with respect to accounts  receivable is limited to certain customers
to whom the Company

                                    F-8



                     BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (CONTINUED)
     (INFORMATION         AS OF JUNE 30, 1996 AND FOR THE SIX MONTHS  ENDED JUNE
                          30, 1996 AND 1995 IS UNAUDITED.)

(1) BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)

makes  substantial  sales.  The  Company  does not require  collateral  from its
customers. To reduce risk, the Company routinely assesses the financial strength
of its  customers  and,  as a  consequence,  believes  that its  trade  accounts
receivable credit risk exposure is limited.

 (xi) Interim Consolidated Financial Statements


    The  consolidated  financial  statements as of June 30, 1996 and for the six
months  ended  June  30,  1995 and 1996 and  related  footnote  information  are
unaudited and have been prepared on a basis  substantially  consistent  with the
audited consolidated  financial  statements,  and, in the opinion of management,
include  all  adjustments  (consisting  of only  normal  recurring  adjustments)
necessary for fair  presentation  of the results of these interim  periods.  The
results of the six months ended June 30, 1996 are not necessarily  indicative of
the results to be expected for the entire year.


 (xii) Deferred Revenue

    Deferred revenue consists of payments  received from customers in advance of
services performed.

 (xiii) Computation of Income (Loss) Per Share

   
    Net income  (loss)  per common  share is  computed  based upon the  weighted
average number of common shares and common equivalent shares (using the treasury
stock method)  outstanding  after certain  adjustments  described below.  Common
equivalent shares consist of common stock options and warrants  outstanding.  In
accordance with Securities and Exchange Commission Staff Accounting Bulletin No.
83, all common,  redeemable  common,  and common equivalent shares issued during
the twelve month period prior to the proposed date of the initial  filing of the
Registration  Statement  have been included in the  calculation  as if they were
outstanding  for all periods  using the  treasury  stock  method and assuming an
initial  public  offering  price of $8.50 per share.  Fully  diluted  net income
(loss) per common  share is not  presented  as it does not differ  from  primary
earnings per share.
    
 (xiv) Recent Accounting Pronouncements

    In March 1995, the Financial  Accounting Standards Board issued Statement of
Financial  Accounting  Standards  No. 121,  "Accounting  for the  Impairment  of
Long-Lived  Assets and for  Long-Lived  Assets to Be Disposed Of" ("SFAS  121").
SFAS 121 requires that an impairment  loss be recognized for  long-lived  assets
and certain identified  intangibles when the carrying amount of these assets may
not be  recoverable.  The Company has adopted SFAS 121 effective in 1996 and the
adoption did not have a material impact on the financial statements.

    In October 1995, the FASB issued Statement of Financial Accounting Standards
No. 123 ("SFAS 123")  "Accounting for Stock-Based  Compensation,"  which becomes
effective  for  fiscal  years  beginning  after  December  15,  1995.  SFAS  123
establishes  new financial  accounting and reporting  standards for  stock-based
compensation  plans.  However,  entities are allowed to elect whether to measure
compensation expense for stock-based  compensation under SFAS 123 or APB No. 25,
"Accounting  for Stock Issued to Employees." The Company has elected to continue
to account under APB No. 25 and will make the required pro forma  disclosures of
net  income and  earnings  per share as if the  provisions  of SFAS 123 had been
applied in its December 31, 1996 financial  statements.  The potential impact of
adopting this standard on the Company's pro forma  disclosures of net income and
earnings per share has not been quantified at this time.

 (xv) Pro Forma Presentation (Unaudited)

    As  discussed  further  in Note 11,  completion  of a public  offering  will
terminate the redemption  feature of the  Redeemable  Common Stock and cause its
reclassification  into 117,647  shares of common stock.  The unaudited pro forma
balance sheet has been prepared assuming the  reclassification of the Redeemable
Common Stock into common stock as of June 30, 1996.



                                    F-9



                     BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (CONTINUED)
     (INFORMATION         AS OF JUNE 30, 1996 AND FOR THE SIX MONTHS  ENDED JUNE
                          30, 1996 AND 1995 IS UNAUDITED.)


(2) ACQUISITION

    Effective January 1, 1993, North American Laboratory,  Inc., a Massachusetts
corporation and wholly-owned subsidiary of BBI, acquired the net assets of North
American  Laboratory  Group,  Ltd.,  Inc. from its founder and chief  scientific
officer, who remains in this same capacity. During 1995, the name was changed to
BBI-North  American  Clinical   Laboratories,   Inc.  BBI-NACL  is  a  specialty
infectious  disease testing  laboratory  providing testing services to hospitals
and other  health  care  providers.  The  purchase  price was  $425,000  in cash
representing  $375,038 of net tangible  assets  (including  cash of $35,297) and
$49,962 of goodwill and other intangibles.

(3) INVENTORIES

    The  Company  purchases  human  plasma and serum from  various  private  and
commercial  blood  banks.  Upon  receipt,   such  purchases   generally  undergo
comprehensive  testing,  and  associated  costs are included in the value of raw
materials.  Most plasma is  manufactured  into  Basematrix and other  diagnostic
components  to  customer  specifications.  Plasma  and  serum  with the  desired
antibodies or antigens are sold or  manufactured  into Quality  Control  Panels,
Accurun(tm) run controls,  and reagents ("Finished Goods").  Panels and reagents
are unique to specific donors and/or collection periods, and require substantial
time to characterize and manufacture due to stringent technical  specifications.
Panels play an important role in diagnostic test kit development,  licensure and
quality  control.  Panels are  manufactured  in  quantities  sufficient  to meet
expected user demand which may exceed one year.

Inventories consist of the following:


<TABLE>
<CAPTION>
                                DECEMBER 31,
                                ------------
                             1994          1995       JUNE 30, 1996
                             ----          ----       -------------
                                                       (UNAUDITED)
<S>                       <C>           <C>           <C>
Raw materials             $ 1,548,560   $ 1,298,131    $ 1,272,687
Work-in-process               551,280       565,667        597,922
Finished goods              1,509,676     1,813,053      1,994,610
                           ----------    ----------     ----------
                          $ 3,609,516   $ 3,676,851    $ 3,865,219
                          ===========   ===========    ===========
</TABLE>

(4) PROPERTY AND EQUIPMENT

    Property  and  equipment  at  December  31,  1994  and 1995  consist  of the
following:


<TABLE>
<CAPTION>
                                           1994         1995
                                           ----         ----
<S>                                     <C>          <C>
Laboratory equipment                    $1,442,349   $1,630,872
Management information systems             609,923      834,768
Office equipment                           249,544      332,496
Automobiles                                176,315      178,465
Leasehold improvements                     300,341      108,892
Land, building and improvements             --          941,175
                                         ---------    ---------
                                         2,778,472    4,026,668
Less accumulated depreciation            1,054,052    1,411,686
                                         ---------    ---------

Net book value                          $1,724,420   $2,614,982
                                        ==========   ==========
</TABLE>

    Depreciation  expense for the years ended  December 31, 1993,  1994 and 1995
and the six  months  ended  June  30,  1995 and  1996  was  $286,456,  $345,228,
$425,655, $194,236 and $272,383, respectively.

                                      F-10




                     BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (CONTINUED)
     (INFORMATION         AS OF JUNE 30, 1996 AND FOR THE SIX MONTHS  ENDED JUNE
                          30, 1996 AND 1995 IS UNAUDITED.)

(5) REVENUE FROM SIGNIFICANT CUSTOMERS AND EXPORT SALES

    The Company performs contract research and certain services under contracts,
subcontracts and grants from United States  Government  Agencies,  primarily the
National Institutes of Health ("NIH"). Revenue from such contracts, subcontracts
and  grants  was  approximately  $2,707,000  in 1993,  $1,677,000  in 1994,  and
$1,628,000 in 1995.

    Export sales accounted for approximately  $1,411,000, or 15% of consolidated
revenue in 1993;  $2,279,000,  or 21% in 1994;  $3,104,000,  or 25% in 1995; and
$1,523,000,  or 27%,  and  $1,877,000,  or 27% for the six months ended June 30,
1995 and 1996, respectively.

(6) LONG TERM DEBT

    In August 1995,  the Company's  revolving  line of credit  ("Revolver")  was
increased to  $3,500,000  and the due date  extended to June 30,  1997.  In July
1996, the due date of the Company's  Revolver was extended to June 30, 1998, and
the interest rate reduced to prime plus 1/2 %. In addition, the Company borrowed
$200,000 under a five-year  term loan approved in 1994 ($170,370  outstanding at
December 31, 1995),  $100,000  under a five-year term loan, and $123,700 under a
$350,000  five year term loan facility for  equipment  acquisitions  approved in
1995 ("New Term"). As of December 31, 1995, the Company had additional borrowing
capacity  available  under the New Term facility equal to $226,300.  The Company
borrowed  this amount prior to the facility  expiration  date of May 2, 1996. In
July 1996,  the Company  received  approval for a $250,000,  five year equipment
facility loan from its bank due July 31, 2001 at a rate of prime plus 1%.

    Borrowings  under the  Revolver  are  limited  to 80% of  eligible  accounts
receivable  plus the lesser of 40% of inventory or  $1,500,000.  The Company had
approximately  $657,000  and  $2,028,000  available  under it's  Revolver  as of
December 31, 1995 and June 30, 1996, respectively. Amounts outstanding under the
Revolver  bear interest at the lender's base rate plus 1% (9.75% at December 31,
1995 and 9.25% at June 30, 1996) and are  collateralized by all of the Company's
assets and a $2 million life insurance policy of an officer/stockholder.

    The Revolver contains covenants regarding the Company's debt-to-equity ratio
and certain minimum debt service coverage ratios.  The Revolver further provides
for restrictions on the payment of dividends,  limitations on the acquisition of
property  and  equipment,  limitations  on  additional  borrowings,  and certain
minimum stock ownership levels by the officer/stockholder referred to above.

    In December  1995,  the Company  purchased  its corporate  headquarters  and
manufacturing  facility in West  Bridgewater,  MA from its former  landlord at a
price of $806,800  including  closing costs, and borrowed $750,000 from its bank
to finance the purchase. See also Note 4.

    On  June  30,  1993,  the  Company  exercised  its  option  to  pre-pay  the
acquisition  note in connection  with the 1992 purchase of BTRL at a substantial
discount  from the balance due,  resulting in an  extraordinary  gain of $49,736
($82,893 minus taxes of $33,157).

    During 1993,  convertible  debt in the amount of $17,639 was converted  into
10,690  shares  of  common  stock at a price of $1.65 per  share.  During  1995,
convertible  debt in the amount of $9,600  was  converted  into 5,817  shares of
common stock at a price of $1.65 per share.

                                      F-11



                     BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (CONTINUED)
     (INFORMATION         AS OF JUNE 30, 1996 AND FOR THE SIX MONTHS  ENDED JUNE
                          30, 1996 AND 1995 IS UNAUDITED.)

(6) LONG TERM DEBT -- (CONTINUED)

At December 31, 1994 and 1995,  and June 30, 1996, the Company had the following
debt outstanding:

<TABLE>
<CAPTION>
                                                                                             JUNE 30,
                                                                     1994         1995         1996
                                                                     ----         ----         ----
                                                                                            (UNAUDITED)
<S>                                                               <C>          <C>          <C>
Revolving Line of Credit Agreement due June 30, 1998              $2,533,860   $2,784,307   $1,397,884

Note payable to a bank,  due in monthly  principal
  payments of $17,687  through October 1998 with
  interest fixed at 9.01%. Collateralized by all of the
  assets of the Company                                             813,625       601,375      495,250

Note payable to a bank,  due in monthly  principal  payments  of $3,704  through
  October 1999 with interest at prime rate plus 1.0%.  Collateralized  by all of
  the assets of
  the Company                                                         --          170,370      148,148

Note payable to a bank,  due in monthly  principal  payments  of $1,667  through
  December 2000 with interest at 8.22%.
  Collateralized by all of the assets of the Company                  --          100,000       91,667

Note payable to a bank, with interest only due until May 2, 1996, and thereafter
  54 consecutive equal monthly principal  payments of $6,863 commencing June 18,
  1996. Interest is at prime rate plus 1.0%. Collateralized by
  all of the assets of the Company                                    --          123,700      343,137

Note payable to a bank,  due in 84 fixed  payments of principal  and interest of
  $11,729,  bearing  interest  fixed at 8.30%  for the  first  five  years,  and
  floating  at prime  plus  1.0% for the  remaining  term.  Collateralized  by a
  mortgage and
  all of the assets of the Company                                    --          750,000      705,580

Subordinated  convertible note payable, at 12.5% interest rate, due December 31,
  1996,  interest  payable  monthly.  Convertible into common stock at $1.50 per
  share at the
  option of the holder                                               31,100        21,500       21,500

Other installment notes payable with interest rates ranging from 7.25% to 10.99%
  at December 31, 1995,  collateralized  by office equipment and vehicles due at
  various maturity
  dates from April 1996 to August 2001                               42,947       100,758       84,541
                                                                   ---------    ---------    ---------
  Total long term debt                                            3,421,532     4,652,010    3,287,707
Less: current maturities                                           (242,006)     (436,509)    (490,126)
                                                                   ---------    ---------    ---------
                                                                 $3,179,526    $4,215,501   $2,797,581
                                                                 ==========     =========   ==========
</TABLE>

                                      F-12




                    BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (CONTINUED)
     (INFORMATION         AS OF JUNE 30, 1996 AND FOR THE SIX MONTHS  ENDED JUNE
                          30, 1996 AND 1995 IS UNAUDITED.)

(6) LONG TERM DEBT -- (CONTINUED)

    At December 31, 1995, debt maturities are as follows:


<TABLE>
<CAPTION>
 YEAR ENDED                                                             AMOUNT
 ----------                                                             ------
  <S>                                                                 <C>
  1996                                                                $  436,509
  1997                                                                 3,199,875
  1998                                                                   386,723
  1999                                                                   207,300
  2000                                                                   161,382
  Thereafter                                                             260,221
                                                                       ---------
                                                                      $4,652,010
                                                                      ==========
</TABLE>

(7) INCOME TAXES

    The  Company's  effective  tax rate does not  significantly  differ from the
federal and state income tax statutory  rates.  The  components of the provision
for income taxes are as follows:


<TABLE>
<CAPTION>
                                                    1993        1994        1995
                                                    ----        ----        ----
<S>                                              <C>          <C>         <C>
Current expense: federal and state               $  23,700    $  91,242   $ 130,422
Deferred (benefit) expense: federal and state       49,930      (26,891)    (61,765)
                                                  --------     --------    --------
  Total                                          $  73,630    $  64,351   $  68,657
                                                 =========    =========   =========
</TABLE>

    The  provision  for 1993  includes  $33,157 of income taxes which was offset
against the  extraordinary  gain on elimination of debt of $82,893 and presented
net in the Statement of Operations. See also Notes 2 and 6.

    Significant items making up deferred tax liabilities and deferred tax assets
are as follows:


<TABLE>
<CAPTION>
                                                             1994        1995
                                                             ----        ----
<S>                                                       <C>          <C>
Current deferred taxes:
   Inventory                                              $  47,318        --
   Allowances and other accruals                             54,562    $ 110,766
                                                            -------      -------
     Total deferred tax assets                              101,880      110,766

Long term deferred taxes:
   Accelerated tax depreciation                            (163,139)    (207,361)
   Cash basis benefit of subsidiary                         (47,818)       --
   Goodwill                                                 (26,859)     (22,795)
   Tax credits                                              100,296      106,710
   State net operating loss carryforwards                    --           38,805
                                                            -------      -------
     Total deferred tax liabilities                        (137,520)     (84,641)
                                                            -------      -------
     Total net deferred tax (liabilities) assets          $ (35,640)   $  26,125
                                                          ===========  =========
</TABLE>

    As of December 31, 1995,  the net  operating  loss  carryforwards  expire at
various  dates  beginning in 1998 through  2000.  Tax credits  expire at various
dates beginning in 2006 through 2009.

                                      F-13



                    BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (CONTINUED)
     (INFORMATION         AS OF JUNE 30, 1996 AND FOR THE SIX MONTHS  ENDED JUNE
                          30, 1996 AND 1995 IS UNAUDITED.)

(8) COMMITMENTS AND CONTINGENCIES

    The Company leases certain office space, laboratory, and research facilities
under operating leases with various terms through July 2000. All the real estate
leases include renewal options at increasing levels of rent.

    One of the facility leases  includes  scheduled base rent increases over the
term of the lease.  The amount of base rent payments is being charged to expense
on the straight-line method over the term of the lease. As of December 31, 1995,
the Company has recorded a $141,068  noncurrent  liability to reflect the excess
of rent expense over cash payments since  inception of the lease. In addition to
base rent, the Company pays a monthly  allocation of the operating  expenses and
real estate taxes for the above facilities.

    Rent expense for the years ended  December  31, 1993,  1994 and 1995 and six
months ended June 30, 1995 and 1996 was $479,697,  $549,713,  $477,580, $225,109
and $181,816,  respectively.  At December 31, 1995,  the  remaining  fixed lease
commitment was as follows:


<TABLE>
<CAPTION>
 YEAR ENDED                                                              AMOUNT
 ----------                                                              ------
<S>                                                                     <C>

1996                                                                    $371,200
1997                                                                     254,600
1998                                                                     117,300
1999                                                                     124,800
2000                                                                      79,700
                                                                         -------
                                                                        $947,600
                                                                        ========
</TABLE>


    Commencing  in  February  1995,  the  Company  committed  under a  sponsored
research  agreement with a university to fund a research  scientist at a cost of
$13,125 per  quarter  for three  years  which costs are charged to research  and
development expense. In return, the Company has exclusive rights to any anti-HIV
compounds or derivatives developed in the course of this research,  provided the
Company obtains certain regulatory approvals from the FDA.


(9) RETIREMENT PLAN

    In January,  1993,  the Company  adopted a  retirement  savings plan for its
employees,  which has been qualified under Section 401(k) of the Code.  Eligible
employees are permitted to  contribute  to the plan through  payroll  deductions
within  statutory  limitations  and subject to any  limitations  included in the
plan. To date, the Company has made no contributions to the plan.

(10) COMMON STOCK

    The Company has two stock option plans which are administered by a committee
of the Board of Directors who determines the employees and affiliated persons to
receive  options and the number and option price of shares  covered by each such
option.

    Options  granted under both plans may be either  incentive  stock options or
non-qualified stock options. In general, for incentive stock options, the option
price  shall not be less than the fair  market  value at the time the  option is
granted. Generally,  options become exercisable at the rate of 25% at the end of
each of the four years  following the  anniversary of the grant.  Options issued
expire ten years from the date of grant, or 30 days from the date of termination
or affiliation.

    At December 31, 1995,  897,600  shares have been reserved for  non-qualified
stock options,  of which 97,125 are available for future grants. At December 31,
1995,  750,000 shares have been reserved for incentive  stock options,  of which
696,812 are available for future grants.

                                      F-14



                     BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (CONTINUED)
     (INFORMATION         AS OF JUNE 30, 1996 AND FOR THE SIX MONTHS  ENDED JUNE
                          30, 1996 AND 1995 IS UNAUDITED.)

(10) COMMON STOCK -- (CONTINUED)

    The Company has issued  warrants in connection  with certain equity and debt
financings.  As of June 30,  1996,  226,670  shares  of Common  Stock  have been
reserved  for issuance  pursuant to the exercise of such  warrants at a weighted
average exercise price of $2.50 per share.

    The Company has reserved  shares of its authorized but unissued common stock
for the following:


<TABLE>
<CAPTION>
                                                    STOCK OPTIONS               WARRANTS
                                                    -------------               --------
                                                              PRICE                    PRICE         TOTAL
                                                 SHARES     PER SHARE     SHARES     PER SHARE      SHARES
                                                 ------     ---------     ------     ---------      ------
<S>                                              <C>        <C>           <C>       <C>            <C>
Balance outstanding, December 31, 1992            747,600   $.25-$4.50    266,670   $2.00-$2.50    1,014,270
   Granted                                        166,250         4.50     59,468     3.75-5.20      225,718
   Exercised                                      (13,000)    .25-1.50    (20,000)         2.50      (33,000)
   Expired                                        (19,000)        2.50      --                       (19,000)
                                                  -------                 -------                   --------
Balance outstanding, December 31, 1993            881,850     .25-4.50    306,138     2.00-5.20    1,187,988
   Granted                                         --           --          --          --            --
   Exercised                                      (19,375)    .25-4.50     (4,600)         3.75      (23,975)
   Expired                                        (81,525)    .25-4.50      --          --           (81,525)
                                                  -------                 -------                   --------
Balance outstanding, December 31, 1994            780,950     .25-4.50    301,538     2.00-5.20    1,082,488
   Granted                                         73,187         6.00      --          --            73,187
   Exercised                                       (6,000)   1.50-2.50    (41,200)    2.50-5.20      (47,200)
   Expired                                        (47,850)   1.50-4.50      --          --           (47,850)
                                                  -------                 -------                   --------
Balance outstanding, December 31, 1995            800,287     .25-6.00    260,338     2.00-5.20    1,060,625
   Granted (unaudited)                            140,600    7.00-8.50      --          --           140,600
   Exercised (unaudited)                           --           --        (12,000)         5.20      (12,000)
   Expired (unaudited)                             (6,500)   6.00-7.00    (21,668)         5.20      (28,168)
                                                  -------                 -------                   --------
Balance outstanding, June 30, 1996
  (unaudited)                                     934,387     .25-8.50    226,670     2.00-5.00    1,161,057
                                                 ========                 =======                 ==========

Exercisable at June 30, 1996 (unaudited)          359,500     .25-1.65      --          --           359,500
                                                  262,200    2.50-4.50    206,670     2.00-2.50      468,870
                                                   31,984         6.00     20,000          5.00       51,984
                                                  -------                 -------                   --------
Total exercisable at June 30, 1996
  (unaudited)                                     653,684   $.25-$6.00    226,670   $2.00-$5.00      880,354
                                                 ========                 =======                 ==========
Proceeds of exercisable at June 30, 1996
  (unaudited)                                  $1,356,655                $566,675                 $1,923,330
                                               ==========                ========                 ==========
</TABLE>

                                      F-15



                     BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (CONTINUED)
     (INFORMATION         AS OF JUNE 30, 1996 AND FOR THE SIX MONTHS  ENDED JUNE
                          30 1996 AND 1995 IS UNAUDITED.)


(11) SUBSEQUENT EVENTS


 Stock Split


    On August 8, 1996 the Board of Directors  approved a 1-for-2  reverse  stock
split and an increase in authorized common shares to 20,000,000,  and authorized
1,000,000 shares of preferred stock (par value $.01), which were approved by the
stockholders  on  September  10,  1996.  The stock split has been  retroactively
reflected in the  accompanying  financial  statements  and notes for all periods
presented.

STOCK PURCHASE AGREEMENT (UNAUDITED)

    On April 26, 1996, the Company  entered into a Stock Purchase  Agreement and
Exclusive  Distributor  Agreement  for five  years  with a foreign  distributor.
Pursuant to the Stock Purchase  Agreement,  the Company issued 117,647 shares of
redeemable common stock at a price per share of $8.50, for which it received net
proceeds of $898,503. Issuance costs were $101,497.  Furthermore,  the agreement
may  require  the  Company  to  repurchase  the  stock  at  the  issuance  price
($1,000,000  in  total)  in  three  equal  installments  in the  event  that the
Distribution Agreement is terminated by the Company prior to the completion of a
public  offering.  Completion of a public offering will terminate the redemption
feature  and cause  the  reclassification  of these  shares  into  stockholders'
equity. In addition, the distributor is restricted from selling these securities
for a one-year period after  completion of such Offering.  The Company  utilized
the 80,000 shares of Treasury Stock in connection with this transaction.

BioSeq, Inc. (Unaudited)

    In October  1996,  the Company  entered into a License  Agreement,  Purchase
Agreement,   Stockholders'  Agreement  and  Warrant  Agreement  with  BioSeq,  a
privately held, technology based development stage company.

    The Company has agreed to purchase convertible preferred stock of BioSeq for
an aggregate of $1,482,500 in three  installments.  Of the $1,482,500,  $210,000
was  invested  at the date of the  agreements  and  $522,500  is  required to be
invested  within ten business days of the closing of the initial public offering
of the Company's  common stock provided the closing  occurs before  December 31,
1996. The Company must make the remaining $750,000 installment if BioSeq attains
certain  technical  milestones  by July 31,  1997.  If such  milestones  are not
attained by BioSeq by July 31,  1997,  the Company will still have the option to
make the  remaining  $750,000  investment  until  December 31,  1997.  Under the
operative documents, the Company has price anti-dilution protection, pre-emptive
rights and the right to board  representation,  the last of which  terminates if
the Company fails to make the second  installment under the Purchase  Agreement.
In addition,  the Company was granted warrants to acquire  additional  shares of
common stock of BioSeq for additional  consideration  under certain  conditions,
provided  that this right is not  exercisable  to the extent it would  cause the
Company's  ownership to equal or exceed 20%. The Company is  accounting  for its
investment in BioSeq on the cost basis in accordance  with the provisions of APB
18 since  the  cumulative  investment  is and must  remain  less than 20% of the
equity  of  BioSeq  and the  Company  does not exert  significant  influence  or
control.   Due  to  the  uncertainty  of  technology  based   development  stage
enterprises  and in accordance with the provisions of SFAS 121, the Company will
perform a periodic  analysis of the investment to determine whether the carrying
value of its  investment  in BioSeq has been  impaired.  If so  determined,  the
Company would adjust the carrying  value of its investment by taking a charge to
earnings.

    Upon the  earlier  of  payment  of the final  installment  of the  Company's
aggregate  $1,482,500  investment  and December  31,  1997,  the Company will be
granted a worldwide  right to use the BioSeq  technology  relating to sequencing
and analysis  services.  The License will be  exclusive  until BioSeq  commences
selling on a  commercial  basis the  equipment  used in the DNA  sequencing  and
analysis  process,  at which time the  License  will become  non-exclusive.  The
License  provides that the Company will pay BioSeq  royalties  ranging from five
percent to ten percent of net revenues arising out of the services  performed by
the Company  with the  licensed  technology.  The Company  will  account for the
royalty as a cost of revenue as the revenues are earned.


                                      F-16



                     BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (CONTINUED)
     (INFORMATION         AS OF JUNE 30, 1996 AND FOR THE SIX MONTHS  ENDED JUNE
                          30, 1996 AND 1995 IS UNAUDITED.)


(11) SUBSEQUENT EVENTS -- (CONTINUED)

Initial Public Offering (Unaudited)

    The Company  has filed a  registration  statement  for the sale of shares of
common  stock.  Accordingly,  the  unaudited  pro forma  balance  sheet has been
prepared  assuming  the  reclassification  of the  redeemable  common stock into
common stock as of June 30, 1996.  There can be no  assurances  that the initial
public offering of common stock will be successfully completed.

(12) SUPPLEMENTARY PRO FORMA EARNINGS PER SHARE -- (UNAUDITED)
   
    If the  Offering  had been  completed  on January 1, 1995,  a portion of the
proceeds  would have been used to retire all debt  outstanding at that time, and
all debt  incurred  in 1995 and 1996  would not have been  needed.  Based on the
foregoing,  supplemental  pro forma net earnings per share of common stock would
have been $.09 and $.05 for the year ended  December 31, 1995 and the six months
ended June 30, 1996,  respectively.  Such net earnings per share of common stock
are based on  3,626,391  and  3,727,557  shares of  common  stock  respectively,
consisting of 3,151,477  and  3,252,643  shares of common stock and common stock
equivalents  plus 474,914  shares  assumed to be issued at $8.50 per share as if
the Offering had occurred on January 1, 1995 to retire indebtedness  outstanding
during 1995.
    

                                   F-17





                                    GLOSSARY

AIDS                          Acquired  Immune  Deficiency  Syndrome.   AIDS  is
                              caused    by    infection     with    the    Human
                              Immunodeficiency Virus, HIV.

Antibodies                    Binding proteins naturally produced by the body in
                              response to exposure  to  non-self  agents  (e.g.,
                              bacteria,  viruses, cancer cells). Antibodies form
                              part of the immunological defense system.

Antigens                      Foreign  non-self  agents (such as the proteins or
                              the  nucleic  acids  of  infectious  agents)  that
                              stimulate  an  immune   response,   including  the
                              production of antibodies.

Assay                         Synonym  for  test:  qualitative  or  quantitative
                              measurement of some component of a material.

Chlamydia                     A  sexually  transmitted  pathogen  that can cause
                              Trachoma  (an  eye  disease  which  culminates  in
                              blindness),  chronic  infection of genitals (which
                              can  result  in   infertility),   and   pneumonia,
                              especially in the newborn.

CLIA                          The Clinical  Laboratory  Improvement  Amendments,
                              passed by Congress in October 1988, and formulated
                              into  regulations  and  implemented  by the Health
                              Care Financing  Administration  beginning in 1992.
                              CLIA refers to a set of  regulations  which govern
                              the staffing and function of all U.S. laboratories
                              that  perform  in  vitro   diagnostic   tests  for
                              clinical use,  except for blood bank  laboratories
                              and     Veterans'      Administration     hospital
                              laboratories, which are regulated separately using
                              similar rules.

Cytomegalovirus               A virus  responsible for several diseases that are
                              especially prevalent in immunocompromised patients
                              such as those infected with HIV,  receiving  organ
                              transplants or receiving cancer chemotherapy.

Diagnostic                    Components  The solutions  and materials  that are
                              combined,  sometimes after further manufacture, to
                              make an in vitro diagnostic test kit.

DNA                           Deoxyribonucleic  Acid, together with RNA, a class
                              of molecules  called "nucleic  acids." DNA carries
                              the genetic  information in most living organisms.
                              The DNA of each cell contains the  information for
                              "building"  a whole  organism  (e.g.,  a virus,  a
                              plant,  or a whole human  being).  DNA testing can
                              identify   microscopic   amounts  of  the  genetic
                              material of a virus or bacterium,  thus indicating
                              its  presence in  quantities  undetectable  in the
                              bloodstream by immunoassay techniques.

ELISA                         Enzyme-Linked  Immunosorbent  Assay, a biochemical
                              procedure in which  interactions among antibodies,
                              antigens  and  enzymes  are  used  to  detect  and
                              quantify  various  diseases and other materials of
                              interest through the measurement of color released
                              at the end of the assay.

End-User                      The   purchaser   and  consumer  of  an  in  vitro
                              diagnostic    test    kit;     usually    clinical
                              laboratories,  but may also be other  health  care
                              providers or members of the general public.


                                      G-1



Hepatitis                     A disease that causes  inflammation  of and damage
                              to the liver, often caused by a virus. In advanced
                              stages,  hepatitis can result in life  threatening
                              liver   dysfunction,   liver  cirrhosis  or  liver
                              cancer.  The most common causes of viral hepatitis
                              are the Hepatitis A, B and C viruses (HAV, HBV and
                              HCV).

HIV                           Human  Immunodeficiency  Virus. HIV, a retrovirus,
                              causes   AIDS.   HIV   infection   leads   to  the
                              destruction of the immune system.

Immunology                    Narrowly  defined  as  the  study  of  the  immune
                              system,  but  often  used to  describe  tests  for
                              infectious diseases which rely on the principle of
                              the binding of antigens and antibodies.

Immunoassay                   A  test  that  relies  on the  specificity  of the
                              reaction between antibodies and antigens to detect
                              and  measure  the   concentration   of  biological
                              molecules.

In Vitro                      Laboratory  procedures  that  occur  "in the  test
                              tube," or outside  the body.  In vitro  diagnostic
                              testing is the process of analyzing blood,  urine,
                              saliva  and other  specimens  outside  the body to
                              screen for, monitor or diagnose diseases and other
                              medical conditions.

Infectious                    Agent  Any   microorganism,   such  as   bacteria,
                              viruses,  fungi or  other  parasites,  capable  of
                              invading   another   organism,   with  or  without
                              pathological manifestations.

Levey-Jennings Chart          A  chart  on  which  the  test  results  for a Run
                              Control  are  plotted  over  time,   so  that  the
                              reproducibility of a test method can be monitored.
                              The  acceptable  range  for  the Run  Control,  as
                              determined by each  individual  test kit end-user,
                              is also indicated on the chart.

Lyme                          Disease  A   bacterial   infection   caused  by  a
                              spirochete   called   Borrelia   burgdorferi   (B.
                              burgdorferi).  This spirochete usually infects the
                              deer tick  which  then  bites a person or  animal,
                              thus transmitting the infection.

Marker                        A substance which, when detected in blood or other
                              study sample by an in vitro  diagnostic  test,  is
                              indicative  of the  presence  of  disease or other
                              medical condition.

Microbiology                  The  clinical   laboratory  testing  segment  that
                              specializes  in the  detection of  organisms  that
                              cause infectious  disease.  Often used to refer to
                              traditional  tests that use a growth  medium which
                              enables an organism,  if present, to replicate and
                              be detected visually.  Newer methods for detection
                              and  monitoring  of  infectious  diseases  such as
                              immunology  and  molecular   biology  methods  are
                              sometimes  performed in separate  laboratories and
                              sometimes     incorporated    into    microbiology
                              laboratories.

Molecular                     Biology The clinical  laboratory  testing  segment
                              which  uses  newer  methods  such as PCR to detect
                              nucleic acids (i.e.,  DNA and RNA) for  infectious
                              disease diagnosis and other purposes.



                                      G-2


Multi-Marker                  Run Control A run control designed to be used with
                              several tests for  different  analytes or markers.
                              These  controls  are  designed to cover  groups of
                              markers  that are  tested  in the same  laboratory
                              section,  e.g., Accurun 1(R) is a multi-marker run
                              control for blood bank tests.

Nucleic                       Acids   Two   families   of    compounds    called
                              deoxyribonucleic  acid (DNA) and ribonucleic  acid
                              (RNA) that carry the coded  information from which
                              all living organisms are made.

Pathogen                      An  organism  that  causes  disease  in the  study
                              subjects  (e.g.,  a virus which causes  disease in
                              humans is human  pathogen;  an insect  that causes
                              disease in a plant is a plant pathogen).

PCR                           Polymerase Chain Reaction,  a sequence of chemical
                              steps using DNA primers  (short  pieces of nucleic
                              acids)  to  locate  and  copy  (amplify)  specific
                              sequences of DNA, if present,  to a  concentration
                              high enough for chemical detection.

Performance                   Panels A set of serum and plasma samples collected
                              from many different  individuals and characterized
                              for  the  presence  or  absence  of  a  particular
                              disease marker.

Plasma                        The clear liquid  portion of blood which  contains
                              clotting factors, proteins, antibodies,  hormones,
                              electrolytes  and other  components  dissolved  in
                              water.  Plasma  differs  from  serum  only in that
                              plasma  contains  clotting  factors in addition to
                              its other components, and serum does not.

Qualification                 Panels   Dilutions   of  human   plasma  or  serum
                              manifesting a full range of  reactivities  in test
                              kits for a specific marker.

Qualitative                   Test An assay for which the reportable results are
                              positive,    negative   or    indeterminate.    An
                              alternative set of terms sometimes used to express
                              qualitative test results is reactive, non-reactive
                              or gray zone.

Quality                       Control Products Materials including characterized
                              samples  of  various   kinds,   data   sheets  and
                              software,  all designed for use in the performance
                              evaluation  of in vitro  diagnostic  tests  during
                              their development, manufacture or use.

Quantitative                  Test An assay for which the reportable results are
                              numeric.

Reactivity                    Test result for a qualitative  test;  can take one
                              of   three    forms:    positive,    negative   or
                              indeterminate.

Reagent                       A substance,  usually a chemical solution, used as
                              a component of an in vitro diagnostic test.



                                      G-3



Retrovirus                    A virus with its  genetic  information  encoded in
                              RNA rather than DNA. HIV is a retrovirus.

RNA                           Ribonucleic  acid,  with DNA, a class of molecules
                              called  nucleic  acids.  RNA functions with DNA in
                              most  organisms  to  translate  the coded  genetic
                              information  into  the  organism  itself.  In some
                              viruses,  RNA  substitutes for DNA in carrying the
                              coded information from which the organism is made.
                              HIV and HCV are RNA viruses.

Run Controls                  Well-characterized  samples  designed  to resemble
                              the donor and  patient  samples  routinely  tested
                              with a  given  method,  manufactured  to  specific
                              levels of  reactivity  and provided in  quantities
                              sufficient  to be used  each time the test is run,
                              over a period of time,  so that  test  performance
                              can be continuously monitored.

Sensitivity                   The ability of a test to detect  accurately  small
                              quantities of a substance of interest. The greater
                              the  sensitivity,  the smaller the quantity of the
                              substance the test can detect, and the fewer false
                              negatives  will  be  reported.   Sensitivity   and
                              specificity  are  two  important  measures  of the
                              quality of a test.

Sensitivity                   Panels Precise  dilutions of human plasma or serum
                              containing a known amount of an infectious disease
                              marker   as   calibrated   against   international
                              standards.

Seroconversion                Panels  Plasma  samples  collected  from a  single
                              individual  over a specific  time  period  showing
                              conversion  from  negative to positive for markers
                              of an infectious disease.

Serum                         The clear liquid  portion of blood which  contains
                              proteins, antibodies,  hormones,  electrolytes and
                              other components dissolved in water. Serum differs
                              from  plasma  only in that serum does not  contain
                              clotting factors.

Single                        Analyte Run  Control A run control  designed to be
                              used with  tests for a single  analyte  or marker,
                              e.g.,  Accurun  106 is a positive  control for HIV
                              antigen tests from several manufacturers.

Specificity                   The  ability  of a  test  to  distinguish  between
                              similar  materials.  The greater the  specificity,
                              the better a test is at identifying a substance in
                              the presence of substances of similar makeup,  and
                              the  fewer  false   positives  will  be  reported.
                              Sensitivity  and  specificity  are  two  important
                              measures of the quality of a test.

Therapeutic Index             A   mathematical   description  of  the  potential
                              usefulness  of a  candidate  drug,  based  on  its
                              toxicity   to   the   host   system   versus   its
                              effectiveness    against   the    pathogen.    The
                              Therapeutic  Index of a candidate drug is compared
                              to the  Therapeutic  Index in the same test system
                              of a drug  already  in use for the  disease  being
                              studied.


                                      G-4




Titer                         An  approximation of the quantity of a marker in a
                              qualitative  test,  arrived  at  by  diluting  the
                              sample  repeatedly and testing the dilutions until
                              the  marker  is no  longer  detected  by the  test
                              method.

Toxoplasma                    A   protozoan   parasite,    ubiquitous   in   the
                              environment,   and  which  causes   Toxoplasmosis.
                              Toxoplasmosis is commonly  acquired by eating food
                              contaminated  by cysts.  Pregnant  women may be at
                              risk of acquiring  Toxoplasmosis  from cats,  with
                              subsequent infection of the baby.

Virus                         A  microorganism  dependent on host cells in order
                              to grow and reproduce.

Western Blot Method           The standard diagnostic method for confirmation of
                              the presence of an infectious disease marker (e.g.
                              HIV,  Borrelia  burgdorferi),  in which  lysate (a
                              mixture  of  proteins)  is  separated  on a gel by
                              electrochemical  means and then  transferred  to a
                              nitrocellulose  filter.  The filter is then tested
                              against a blood sample to identify  antibodies  to
                              the proteins.



                                      G-5









Photograph  showing  certain of the Company's  Quality  Control Panel  Products,
including Seroconversion and Performance Panels.













================================================================================

NO  DEALER,  SALESMAN  OR ANY  OTHER  PERSON  HAS  BEEN  AUTHORIZED  TO GIVE ANY
INFORMATION  OR MAKE ANY  REPRESENTATIONS  OTHER  THAN THOSE  CONTAINED  IN THIS
PROSPECTUS IN CONNECTION WITH THE OFFERING  DESCRIBED  HEREIN,  AND, IF GIVEN OR
MADE,  SUCH OTHER  INFORMATION  OR  REPRESENTATIONS  MUST NOT BE RELIED  UPON AS
HAVING BEEN AUTHORIZED BY THE COMPANY, OR THE UNDERWRITERS. NEITHER THE DELIVERY
OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL,  UNDER ANY  CIRCUMSTANCES,
CREATE ANY IMPLICATION  THAT THE INFORMATION  CONTAINED  HEREIN IS CORRECT AS OF
ANY TIME SUBSEQUENT TO ITS DATE. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO
SELL OR A  SOLICITATION  OF AN  OFFER TO BUY ANY  SECURITIES  OTHER  THAN  THOSE
SPECIFICALLY  OFFERED  HEREBY  OR  OF  ANY  SECURITIES  OFFERED  HEREBY  IN  ANY
JURISDICTION  TO ANY  PERSON  TO  WHOM  IT IS  UNLAWFUL  TO  MAKE  AN  OFFER  OR
SOLICITATION IN SUCH JURISDICTION.  THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER
TO  SELL  OR  A  SOLICITATION  OF  AN  OFFER  TO  BUY  SUCH  SECURITIES  IN  ANY
CIRCUMSTANCES IN WHICH SUCH OFFER OR SOLICITATION IS UNLAWFUL.


                                   ----------


                             TABLE OF CONTENTS



                                                                            PAGE
                                                                            ----
Prospectus Summary                                                             3
Risk Factors                                                                   6
Use of Proceeds                                                               14
Dividend Policy                                                               14
Capitalization                                                                15
Dilution                                                                      16
Selected Consolidated Financial Data                                          17
Management's Discussion and Analysis of
  Financial Condition and Results of
  Operations                                                                  19
Business                                                                      25
Management                                                                    40
Certain Transactions                                                          44
Principal Stockholders                                                        45
Description of Capital Stock                                                  46
Shares Eligible for Future Sale                                               48
Underwriting                                                                  49
Legal Matters                                                                 50
Experts                                                                       50
Additional Information                                                        50
Index to Consolidated Financial Statements                                   F-1
Glossary                                                                     G-1


   
    UNTIL  NOVEMBER  25,  1996 (25 DAYS AFTER THE DATE OF THIS  PROSPECTUS)  ALL
DEALERS  EFFECTING  TRANSACTIONS  IN THE SHARES OF COMMON STOCK,  WHETHER OR NOT
PARTICIPATING  IN THIS  DISTRIBUTION,  MAY BE REQUIRED TO DELIVER A  PROSPECTUS.
THIS IS IN ADDITION TO THE  OBLIGATIONS OF DEALERS TO DELIVER A PROSPECTUS  WHEN
ACTING  AS  UNDERWRITERS  AND  WITH  RESPECT  TO  THEIR  UNSOLD   ALLOTMENTS  OR
SUBSCRIPTIONS.
    

================================================================================




                                1,600,000 SHARES



                                     [LOGO]


                             BOSTON BIOMEDICA, INC.


                                  COMMON STOCK





                                   ----------
                                   PROSPECTUS
                                   ----------





                         OSCAR GRUSS & SON INCORPORATED

                              KAUFMAN BROS., L.P.





   
                                October 31, 1996
    





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