SALIVA DIAGNOSTIC SYSTEMS INC
SB-2, 1998-05-27
SURGICAL & MEDICAL INSTRUMENTS & APPARATUS
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<PAGE>   1
     As filed with the Securities and Exchange Commission on May 26, 1998
                                                  Registration No. 333-_______
- --------------------------------------------------------------------------------
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                       
                             REGISTRATION STATEMENT
                                    ON FORM
                                      SB-2
                       UNDER THE SECURITIES ACT OF 1933

                       SALIVA DIAGNOSTIC SYSTEMS, INC.
- --------------------------------------------------------------------------------
         (Name of Small Business Issuer as Specified in its Charter)

                                   Delaware
- --------------------------------------------------------------------------------
                           (State of Incorporation)

                                     3841
- --------------------------------------------------------------------------------
           (Primary Standard Industrial Classification Code Number)

                                 91-154-9305
- --------------------------------------------------------------------------------
                   (I.R.S. Employer Identification Number)

                             11719 NE 95th Street
                         Vancouver, Washington 98682
                                (360) 696-4800
- --------------------------------------------------------------------------------
  (Address and telephone number of registrant's principal executive office)
                       and principal place of business)

                       Kenneth J. McLachlan, President
                       Saliva Diagnostic Systems, Inc.
                             11719 NE 95th Street
                         Vancouver, Washington 98682
                                (360) 696-4800
- --------------------------------------------------------------------------------
          (Name, address and telephone number of agent for service)

                 Please send a copy of all communications to:

                                LaDawn Naegle
                                Bryan Cave LLP
                            700 13th Street, N.W.
                             Washington, DC 20005
                                (202) 508-6046

<PAGE>   2

      Approximate date of proposed sale to the public: As soon as practicable
after the effective date of this Registration Statement.

      If any of the securities being registered on this form are to be offered
on a delayed or continuous basis pursuant to Rule 415 under the Securities Act
of 1933 check the following box. [ X ]

      If this form is registering additional securities pursuant to Rule 462(b)
under the Securities Act please check the following box and list the Securities
Act registration statement number of the earlier effective registration
statement for the offering. [  ]

      If this form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [  ]

      If delivery of the prospectus is expected to be made pursuant to Rule 434
please check the following box. [  ]

      The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933 or until this Registration Statement shall become
effective on such date as the Commission, acting pursuant to said Section 8(a),
may determine.

                       CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------

                                          Proposed             Proposed
Title of each                             maximum              maximum
class of securities    Amount to be       offering price per   aggregate             Amount of
to be registered       registered         unit (1)             offering price (1)    registration fee
- --------------------------------------------------------------------------------------------------
<S>                    <C>                     <C>              <C>                  <C>
Common Stock, par
value $.01 per
share                  6,896,623 shares        $0.285           $1,965,538           $579.83
- --------------------------------------------------------------------------------------------------
</TABLE>

(1)  Estimated solely for purposes of determining the registration fee
     pursuant to Rule 457(c), based upon the average of the closing bid and ask
     prices for the Common Stock of $0.285 on May 18, 1998, as reported by the 
     OTC Bulletin Board.


<PAGE>   3


                                   PROSPECTUS
                         SALIVA DIAGNOSTIC SYSTEMS, INC.
                        6,896,623 SHARES OF COMMON STOCK

      Saliva Diagnostic Systems, Inc. (the "Company") is registering for resale
up to 6,896,623 shares (the "Shares") of its common stock, $.01 par value (the
"Common Stock"), which include (i) 2,051,277 shares which have been and will be
issued in accordance with the terms of a Common Stock Subscription Agreement
dated June 30, 1997 by and between the Company and The Tail Wind Fund Ltd.
("Tail Wind") (the "Tail Wind Subscription Agreement"); (ii) 2,220,000 shares
which have been issued in accordance with the terms of a Common Stock
Subscription Agreement dated June 30, 1997 by and among the Company and certain
other investors (the "Investors"); (iii) 2,285,714 shares which have been issued
in accordance with the terms of a Common Stock Subscription Agreement dated as
of August 22, 1997 by and between the Company and an additional Investor; (iv)
100,000 shares which may be issued upon the exercise of warrants granted to Tail
Wind (the "Tail Wind Warrants"); (v) 194,632 shares which may be issued upon the
exercise of warrants granted to Grayson & Associates, Inc. (the "Grayson
Warrants"); and (vi) 45,000 shares which were issued upon the exercise of
certain warrants. All of the Common Stock offered hereby is being offered for
the account of certain shareholders of the Company which acquired their
securities in private placements conducted by the Company. See "Selling
Shareholders." Additional shares that may become issuable as a result of the
anti-dilution provisions of the Tail Wind Warrants and the Grayson Warrants are
offered hereby pursuant to Rule 416 under the Securities Act of 1933, as amended
(the "Securities Act"). The Company will not receive any of the proceeds from
the sale of the Common Stock being offered hereby (the "Offering"), but will
receive the exercise price payable upon the exercise of the Tail Wind Warrants
and the Grayson Warrants. There can be no assurance that all or any part of the
Tail Wind Warrants or the Grayson Warrants will be exercised or that they will
be exercised for cash.

      The Shares may be sold from time to time in transactions (which may
include block transactions) on the OTC Bulletin Board or in the pink sheets at
the market prices then prevailing. Sales of the Shares may also be made through
negotiated transactions or otherwise. The Selling Shareholders and the brokers
and dealers through which the sales of the Shares may be made may be deemed to
be "underwriters" within the meaning set forth in the Securities Act, and their
commissions and discounts and other compensation may be regarded as
underwriters' compensation. See "Plan of Distribution."

      THE SECURITIES OFFERED HEREBY INVOLVE A HIGH DEGREE OF RISK AND SHOULD NOT
BE PURCHASED BY INVESTORS WHO CANNOT AFFORD THE LOSS OF THEIR ENTIRE INVESTMENT.
PROSPECTIVE PURCHASERS SHOULD CAREFULLY CONSIDER THE MATTERS DISCUSSED UNDER
"RISK FACTORS" BEGINNING ON PAGE 5.

                      -------------------------------------
      THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED
UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE
CONTRARY IS A CRIMINAL OFFENSE.

                       -------------------------------------
<TABLE>
<CAPTION>

                                   Price to Public(1)           Proceeds to Selling Shareholders(1)(2)
                                   ------------------           --------------------------------------
<S>                                <C>                          <C>
Per Share of Common Stock           $.285                       $.285

Total(3)                            $1,965,538                  $1,965,538
</TABLE>

(1) Estimated based upon the average of the closing bid and ask prices for the
Common Stock on May 18, 1998, as reported on the OTC Bulletin Board.
(2) Excludes regular brokerage commissions and other expenses, including
expenses of counsel in excess of $10,000, if any, for Tail Wind and the
Investors, which will be paid by Tail Wind and the Investors, respectively. The
other expenses of the Offering are estimated to be approximately $23,900, all of
which will be paid by the Company.
(3) Assumes all Shares registered will be issued to the Selling Shareholders and
will be sold in this Offering.

                       -------------------------------------
                    The date of this Prospectus is May __, 1998


<PAGE>   4



                            AVAILABLE INFORMATION

      The Company is subject to the information requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance
therewith, files reports and other information with the Securities and Exchange
Commission (the "Commission"). Such reports and other information can be
inspected and copied at the public reference facilities maintained by the
Commission at Room 1024, 450 Fifth Street, N.W., Washington, D.C. 20549; and the
Commission's regional offices at Room 1204, 219 South Dearborn Street, Chicago,
Illinois 60604; Room 1028, 7 World Trade Center, New York, New York 10007; and
Suite 500 East, 5757 Wilshire Boulevard, Los Angeles, California 90036. Copies
of such material can be obtained from the Public Reference Section of the
Commission, Washington, D.C. 20549 at prescribed rates. The Commission maintains
an internet web site that contains reports, proxy statements and other materials
filed electronically by the Company through the Commission's Electronic Data,
Gathering, Analysis and Retrieval (EDGAR) system. This web site can be accessed
at http://www.sec.gov.

      The Company has filed with the Commission a Registration Statement on Form
SB-2 (the "Registration Statement") under the Securities Act with respect to the
shares of Common Stock offered hereby. This Prospectus does not contain all of
the information set forth in the Registration Statement or the exhibits thereto.
As permitted by the rules and regulations of the Commission, this Prospectus
omits certain information contained or incorporated by reference in the
Registration Statement. For further information, reference is hereby made to the
Registration Statement and exhibits thereto, copies of which may be inspected at
the offices of the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549
or obtained from the Commission at the same address at prescribed rates.

      The Company furnishes Annual Reports to the holders of its securities
which contain financial information which have been examined and reported upon,
with an opinion expressed by, its independent certified public accountants.


                                       2
<PAGE>   5



                              PROSPECTUS SUMMARY

      The following summary is qualified in its entirety by reference to the
more detailed information and financial statements, including the notes thereto,
appearing elsewhere in this Prospectus. Each prospective investor is urged to
read this Prospectus in its entirety.

                                 THE COMPANY

      Saliva Diagnostic Systems, Inc., a Delaware corporation (the "Company"),
is primarily engaged in the development, manufacturing and marketing of rapid in
vitro assays for use in the detection of infectious diseases and other
conditions, proprietary specimen collection devices and other diagnostic
devices. The Company has a limited operating history and has incurred
significant operating losses to date.

      The Company has two categories of products: medical specimen collection
devices and rapid antibody immunoassays. The Company's product, Omni-SAL(R), an
on-site, easy-to-use medical collection device, utilizes saliva as a diagnostic
tool to detect the presence of the HIV virus, other infectious diseases and
tobacco use. Omni-SAL(R) is manufactured in the U.K. by a third party and
distributed from SDS International, Ltd. to customers located outside the United
States. The Company's other collection devices include Saliva-Sampler, which is
used to collect saliva specimens, and Omni-Swab, a serrated cotton swab with an
ejectable head, which can be used to collect various body fluids and cells,
primarily for the purposes of DNA identification. See "The Company -- Products."

      The Company has developed rapid immunoassays for the detection of
antibodies to selected pathogens, such as the HIV virus, and Helicobacter
pylori, a bacteria linked to peptic ulcers and gastric cancer. The Company's
immunoassays are designed to require only a few simple steps to use and to
provide results in minutes. To date, the Company has developed three rapid HIV
tests: Sero-Strip HIV, Hema-Strip HIV and Saliva-Strip HIV and a rapid H. pylori
test: Stat-Simple. The Company has under development rapid tests for hepatitis
and tuberculosis. See "The Company -- Products."

      The Company is currently marketing its medical specimen collection devices
(Omni-SAL(R), Saliva-Sampler and Omni-Swab) in many countries and is currently
marketing two of its three HIV rapid tests (Sero-Strip HIV and Hema-Strip HIV)
outside the United States. These HIV rapid tests are not yet approved for
marketing in the United States. See "The Company - Marketing, Sales and
Distribution."

      The Company was incorporated in California in 1986 as E&J Systems, Inc. In
January 1992 the Company merged with and into a Delaware corporation and changed
its name to Saliva Diagnostic Systems, Inc. The Company completed an initial
public


                                       3
<PAGE>   6

offering of its common stock in March 1993. Unless otherwise indicated, all
references to the Company include the Company and its wholly owned subsidiaries.

                                 THE OFFERING
<TABLE>
<S>                                                 <C>
Securities Offered                                  6,896,623 shares of Common Stock.
                                                    See "Description of Securities."

Risk Factors                                        The securities offered hereby
                                                    involve a high degree of risk and
                                                    should not be purchased by investors
                                                    who cannot afford the loss of their
                                                    entire investment.  See "Risk Factors."
</TABLE>

                        SUMMARY FINANCIAL INFORMATION

      The summary financial information set forth below is derived from the
financial statements appearing elsewhere in this Prospectus. Such information
should be read in conjunction with such financial statements, including the
notes thereto.

<TABLE>
<CAPTION>
                                                          Balance Sheet Data                                          
                                                          ------------------                                          
                                                                                                                      
                                     Three Months Ended    Three Months Ended       Year Ended         Year Ended     
                                       March 31, 1998        March 31, 1997     December 31, 1997   December 31, 1996 
                                     -------------------- --------------------- ------------------ -------------------
<S>                                     <C>                  <C>                   <C>                <C>             
Total assets Total                      $ 1,903,689          $1,639,077            $1,639,077         $2,178,201      
liabilities                             $ 2,017,820          $2,305,764            $2,305,764         $1,017,569      
Shareholders' equity                    $(1,271,334)         $ (666,687)           $ (666,687)        $1,160,632      
</TABLE>

<TABLE>
<CAPTION>

                                         Income Statement Data
                                         ---------------------

                      Three Months Ended    Three Months Ended       Year Ended         Year Ended
                        March 31, 1998        March 31, 1997     December 31, 1997   December 31, 1996
                      -------------------- --------------------- ------------------ -------------------
<S>                          <C>             <C>                   <C>                <C>
Total revenues               $ 197,578       $    227,034          $ 1,422,296        $   740,650
Net loss                     $(824,968)      $ (1,174,901)         $(6,612,212)       $(5,152,399)
Net loss per common          $   (0.04)      $      (0.05)         $     (0.27)       $     (0.26)
share                        
Number of common            30,423,590         22,040,784           24,894,900         20,100,000 
shares used in per share    
calculations                
</TABLE>


                                       4
<PAGE>   7

                                 RISK FACTORS

      The securities offered hereby are speculative and involve a high degree of
risk, including, but not limited to, the risk factors described below. Each
prospective investor should carefully consider the following risk factors
inherent in and affecting the business of the Company and this offering before
making an investment decision.

      1. Limited Operating History. Since July 1990, the Company has been
engaged primarily in research and development activities focused on developing
proprietary collection devices and rapid assays. To date, sales of the Company's
products have been to a limited customer base. The Company has a limited
operating history upon which an evaluation of the Company's prospects can be
made. Such prospects must be considered in light of the risks, expenses and
difficulties frequently encountered in the establishment of a new business in a
continually evolving, heavily regulated industry, characterized by an increasing
number of market entrants and intense competition, as well as the risks,
expenses and difficulties encountered in the shift from development to
commercialization of new products based on innovative technology. There can be
no assurance that the Company will be able to implement successfully its
marketing strategy, obtain necessary regulatory approval, generate increased
revenues or ever achieve profitable operations.

      2. Significant Operating Losses; Accumulated Deficit; Explanatory
Paragraph in Report of Independent Certified Public Accountants. The Company has
incurred significant operating losses since its inception, resulting in an
accumulated deficit of $28,526,458 and $21,914,246 at December 31, 1997 and
December 31, 1996, respectively, and a shareholders' equity of $(666,687) and
$1,160,632 at December 31, 1997 and December 31, 1996, respectively. The Company
has incurred additional operating losses through the date of this Prospectus.
Such losses are expected to continue for the foreseeable future and until such
time, if ever, as the Company is able to attain sales levels sufficient to
support its operations. The Company's independent certified public accountants
have included an explanatory paragraph in their report stating that the
Company's significant operating losses and significant capital requirements
raise substantial doubt about the Company's ability to continue as a going
concern.

      3. Significant Capital Requirements; Need for Additional Financing. The
Company's capital requirements have been and will continue to be significant.
The Company has been dependent on private placements of its debt and equity
securities and on a public offering of securities in March 1993 to fund such
requirements. The Company is dependent upon its other efforts to raise capital,
including proceeds received from the exercise of warrants, to finance the costs
of manufacturing, marketing and conducting clinical trials and submissions for
FDA approval of its products and continuing the design and development of the
Company's new products. Marketing, manufacturing and clinical testing may
require capital resources substantially greater than the resources currently
available to the Company. There can be no assurance that the Company will be
able to


                                       5
<PAGE>   8

obtain additional capital resources necessary to permit the Company to implement
or continue its programs. There can be no assurance that such financing will be
available on commercially reasonable terms or at all. Any additional equity
financing may involve substantial dilution to the interests of the Company's
shareholders, which dilution also has occurred in the past.

      4. Disclosure Relating to Low-Priced Stocks. Effective with the close of
market on March 10, 1998, the Company's securities were delisted from The Nasdaq
SmallCap Market for failure to meet the new Nasdaq continued listing
requirements. Trading of the Company's securities is currently being conducted
in the over-the-counter market on the OTC Bulletin Board. As a result, an
investor may find it difficult to dispose of, or to obtain accurate quotations
as to the price of, the Company's securities. In addition, the Company's
securities are now subject to so-called "penny stock" rules that impose
additional sales practice requirements on broker-dealers who sell such
securities. Consequently, the ability or willingness of broker-dealers to sell
the Company's securities and the ability of purchasers of the Company's
securities to sell their securities in the secondary market may be limited.
There can be no assurance that the Company's securities will continue to trade
on the OTC Bulletin Board.

      5. Significant Outstanding Options, Warrants and Convertible Securities.
As of May 11, 1998, there were outstanding (i) stock options to purchase an
aggregate of approximately 2,195,500 shares of Common Stock at exercise prices
ranging from $0.40 to $5.50 per share; (ii) warrants to purchase 1,380,000
shares of Common Stock which were issued in the Company's initial public
offering, are exercisable at $1.25 per share, and expire June 30, 1998, unless
extended by the Company; (iii) warrants to purchase approximately 1,567,216
shares which are exercisable at prices ranging from $0.3375 to $4.00 per share;
(iv) convertible preferred stock which is convertible at the lesser of $0.3375
per share and 80% of the market price of the Common Stock at the time of
conversion (currently estimated to be convertible into approximately 6,000,000
shares); and (v) an option to purchase convertible preferred stock which is
convertible at 80% of the market price of the Common Stock at the time of
conversion (currently estimated to be convertible into approximately 6,500,000
shares).

      Upon the exercise of outstanding options and warrants and the conversion
of outstanding convertible stock, dilution to the Company's shareholders will
occur. Moreover, the terms upon which the Company will be able to obtain
additional equity capital may be adversely affected since the holders of
outstanding options and warrants can be expected to exercise them at a time when
the Company would, in all likelihood, be able to obtain any needed capital on
terms more favorable to the Company than the exercise terms provided by such
outstanding securities.

      6. Potential Dilution; Shares Eligible for Future Sales; Possible Effect
on Additional Equity Financing. Under the conversion formulas of the Company's
currently outstanding convertible preferred stock, the number of shares of
Common Stock issuable upon conversion is inversely proportional to the market
price of the Common Stock at the


                                       6
<PAGE>   9

time of conversion (i.e., the number of shares increases as the market price of
the Common Stock decreases) and there is no cap on the number of shares of
Common Stock which may be issuable. In addition, the number of shares issuable
upon the conversion of the convertible preferred stock and the exercise of
options and warrants is subject to adjustment upon the occurrence of certain
dilutive events.

      On May 18, 1998, there were issued and outstanding a total of 32,378,821
shares of Common Stock. Assuming conversion of the convertible preferred stock
based on the marker price of the Company's Common Stock on the date of this
Prospectus, if all options, warrants, convertible preferred stock and options to
purchase convertible preferred stock which the Company has issued were deemed
converted and exercised, as the case may be, there would be issuable 17,642,716
shares of Common Stock. Upon such conversion and exercise, there would be
outstanding 50,021,537 shares of Common Stock. Of these, the Company currently
has registered for resale approximately 19,488,728 shares (including the Shares
offered hereby) and has granted demand registration rights in respect of
approximately 18,000,000 additional shares. The sale or availability for sale of
this number of shares of Common Stock in the public market could adversely
affect the market price of the Common Stock. Additionally, the availability to
the Company of additional equity financing, and the terms of any such financing,
may be adversely affected by the sale or availability for sale of this number of
shares.

      7. Uncertain Acceptance of Saliva-Based Tests and Rapid Tests as
Diagnostic Tools. The specimens traditionally used for human diagnostic testing
and quantitative measurement of most physiologically active substances, drugs
and toxins in the body, are blood and urine. Substantially all of the
assay-based diagnostic test kits currently available were approved by the FDA
for use with these testing specimens. Political and social factors may create
impediments to the use of rapid tests as diagnostic tools. These factors include
whether certain diagnostic tests, such as HIV antibody tests, should be
conducted without trained specialists and whether rapid tests in nontraditional
testing environments will lead to invasions of privacy. Although the Company
acknowledges the existence of such considerations, it is committed to developing
rapid testing devices as useful diagnostic tools. Limitations on the Company's
ability to market rapid tests caused by political and social factors could have
a material adverse effect on the Company's operations.

      8. Uncertainty of New Product Development. The design and development of
the Company's rapid testing platforms in their current designs have been
completed and limited revenues have been generated from sales thereof. The
Company will be required to devote considerable additional efforts to finalize
the evaluation of its products. Satisfactory completion of development, testing,
evaluations, obtaining regulatory approvals and achieving sufficient production
levels of such products will be required prior to their being available for
commercial sale. The Company's products remain subject to all the risks inherent
in the introduction of new diagnostic products, including unanticipated
problems, as well as the possible insufficiency of funds to continue design and
development which could result in abandonment of or substantial change in the
design or


                                       7
<PAGE>   10

development of such products. There can be no assurance that such products will
be successfully developed, be developed on a timely basis or prove to be as
effective as products based on existing or newly developed technologies. The
inability to successfully complete development, or a determination by the
Company, for financial or other reasons, not to undertake to complete
development of any product, particularly in instances in which the Company has
made significant capital expenditures, could have a material adverse effect on
the Company.

      9. Competition. The market in which the Company operates, saliva and
blood-based collection and diagnostic testing, is highly competitive. The
Company is aware of certain entities, including ChemTrak, Inc., Epitope, Inc.,
Quidel, Inc. and Trinity Biotech, plc and specialized biotechnology firms, as
well as universities and other research institutions, which have developed or
are developing technologies and products which are competitive with Omni-SAL(R)
and the Company's products under development. Many of these competitors are
established and have substantially greater research, marketing and financial
resources than the Company. The Company expects that the number of products
competing with its products will increase as the perceived benefits of
saliva-based testing become more widely recognized. There can be no assurance
the Company will be able to compete successfully.

      10. Technological Change and Risk of Technological Obsolescence. The
biotechnology industry and, in particular, saliva and blood-based diagnostic
testing, is subject to rapid and significant technological change. There can be
no assurance that the Company's competitors will not succeed in developing
technologies and products relating to the collection of saliva for diagnostic
testing prior to the Company or that they will not develop technologies and
products that are more effective than any which have been or are being developed
by the Company. In addition, the diagnostic products market is characterized by
changing technology and developing industry standards sometimes resulting in
product obsolescence or short product life cycles. Accordingly, the ability of
the Company to compete will be dependent on its introducing products to the
marketplace in a timely manner and enhancing and improving such products. There
can be no assurance that the Company will be able to keep pace with
technological developments or that its products will not become obsolete.

      11. Government Regulation. The development, manufacture and sale of the
Company's products in the United States are subject to regulation by the FDA and
other governmental agencies. The process of obtaining FDA approval is costly and
time-consuming, and there can be no assurance that any of the Company's products
not yet approved will be approved by the FDA or other regulatory agencies.
Delays in obtaining regulatory approvals may adversely affect the development,
testing or marketing of the Company's products and the ability of the Company to
generate product revenues therefrom. If and when the Company's products are
approved by the FDA, they will be subject to continuing regulation by the FDA
and state and local agencies. The FDA has established a number of requirements
for manufacturers and requirements regarding


                                       8
<PAGE>   11

labeling and reporting. The failure to comply with these requirements can result
in regulatory action, including warning letters, product seizure, injunction,
product recalls, civil fines and prosecution. An FDA enforcement action could
have a material adverse effect on the Company. The Company is subject to
regulation in certain foreign markets. There can be no assurance that regulatory
approvals for any of the Company's products or for its manufacturing in the
United States will be obtained in a timely manner, or at all.

      12. Risks Related to Foreign Activities. The Company and its manufacturers
may be subject to various import duties imposed by foreign governments
applicable to both finished products and components and may be affected by
various other import and export restrictions or duties as well as other
developments having an impact upon international trade. These factors could,
under certain circumstances, have an impact both on the manufacturing cost and
the wholesale and retail prices of such products. To the extent that
transactions relating to foreign sales, manufacturing of the Company's products
and purchases of components involve currencies other than United States dollars,
the operating results of the Company could be adversely affected by fluctuations
in foreign currency exchange rates.

      13. Uncertainty of Market Acceptance; Dependence Upon Third Party
Distributors. The Company has limited marketing capabilities and resources.
Achieving market acceptance will require substantial marketing efforts and the
expenditure of significant funds to inform potential consumers and the public of
the perceived benefits of the Company's current and proposed products. Moreover,
the Company does not have the financial or other resources to undertake
extensive marketing and advertising activities. The Company has begun to develop
strategic alliances and marketing arrangements, including joint ventures,
license or distribution arrangements. The Company's prospects will be
significantly affected by its ability to successfully develop and maintain its
relationships with its joint venturers, licensors and distributors and upon the
marketing efforts of such third parties. While the Company believes that any
independent distributors and sales representatives with whom it enters into such
arrangements will have an economic motivation to commercialize the Company's
products, the time and resources devoted to those activities generally will be
controlled by such entities and not by the Company. There can be no assurance
that the Company will be able, for financial or other reasons, to develop and
maintain any third party distribution or marketing arrangements or that such
arrangements, if established, will result in the successful commercialization of
any of the Company's products.

      14. Dependence on Manufacturers. The Company relies on arrangements with
third parties for the manufacture of its products. Such manufacturers, if
located in the United States or if manufacturing products to be sold in the
United States, must comply with the FDA's good manufacturing practices ("GMP")
and pass pre-approval inspections by the FDA and periodic GMP inspections.
Wesley Coe, Ltd. manufactures Omni-SAL(R) in the United Kingdom for sale outside
the United States. MML Diagnostic Packaging, Inc. ("MML") manufactures Omni-Swab
and Saliva-Sampler for the Company in the


                                       9
<PAGE>   12

United States and has advised the Company that it is in compliance with all
applicable FDA requirements for such manufacturing. There can be no assurance
that the Company's manufacturer will continue to comply with GMP, that the
Company will be able to locate additional manufacturers that comply with GMP or
secure agreements with such manufacturers on terms acceptable to the Company.
There can be no assurance that MML will be able to meet the Company's
requirements or that MML will continue to manufacture Omni-Swab or
Saliva-Sampler on terms acceptable to the Company.

      15. Dependence Upon Third-Party Suppliers. The Company believes that most
of the components used in the manufacture of its proposed products are currently
available from numerous suppliers located in the United States, Europe and Asia.
The Company believes, however, that certain components are available from a
limited number of suppliers. Although the Company believes that it will not
encounter difficulties in obtaining these components, there can be no assurance
that the Company will be able to enter into satisfactory agreements or
arrangements for the purchase of commercial quantities of such components. The
failure to enter into agreements or otherwise arrange for adequate or timely
supplies of components and the possible inability to secure alternative sources
of components could have a material adverse effect on the Company's ability to
manufacture its products. In addition, development and regulatory approval of
the Company's products in the United States are dependent upon the Company's
ability to procure certain components and certain packaging materials from
FDA-approved sources. Since the FDA approval process requires manufacturers to
specify their proposed suppliers of certain components in their premarket
approval applications ("PMAs"), if any such component were no longer available
from the specified supplier, FDA approval of a new supplier would be required,
resulting in potential manufacturing delays.

      16. Dependence on Small Number of Customers. The Company derives a large
portion of its revenues from sales to a small number of customers. Sales to one
customer accounted for approximately 17% of total product revenues in 1997.
Sales to three customers accounted for approximately 49% of total product
revenues in 1996. At December 31, 1997, accounts receivable from two customers
comprised 32% and 27%, respectively, of total net accounts receivable. The loss
of sales to any of the Company's major customers could have a material adverse
effect on the Company's financial condition and results of operations.

      17. Dependence on Key Personnel. The success of the Company will be
largely dependent on the personal efforts of Kenneth J. McLachlan, its President
and Chief Executive Officer, and certain key management and scientific
personnel. The loss of Mr. McLachlan's services or the services of other key
management or scientific personnel would have a material adverse effect on the
Company's business and prospects. Competition among biotechnology companies for
qualified employees is intense, and the loss of key personnel or the inability
to attract and retain the additional highly skilled employees required for the
Company's activities could adversely affect its business. There


                                       10
<PAGE>   13

can be no assurance that the Company will be able to hire or retain such
necessary personnel.

      18. Uncertainty of Patent Protection; Proprietary Information. The Company
has applied for United States patents on certain aspects of its saliva
collection and diagnostic testing devices and has been awarded eight of these
patents. To the extent possible, the Company also anticipates filing patent
applications for protection on future products and technology which it develops.
There can be no assurance that patents applied for will be obtained, that any
such patents will afford the Company commercially significant protection of its
technology or that the Company will have adequate resources to enforce its
patents. Inasmuch as the Company intends to sell its products in foreign
markets, it is in the process of seeking foreign patent protection on its
current products and technologies. The patent laws of other countries may differ
from those of the United States as to the patentability of the Company's
products and technologies and the degree of protection afforded. Other companies
may independently develop equivalent or superior products and technologies and
may obtain patent or similar rights with respect thereto. Although the Company
believes that its products and technologies have been independently developed
and do not infringe on the patents of others, there can be no assurance that the
Company's products and technologies do not and will not infringe on the patents
of others. In the event of infringement, the Company would, under certain
circumstances, be required to modify its device or obtain a license. There can
be no assurance that the Company will be able to do either of the foregoing in a
timely manner or upon acceptable terms and conditions, and the failure to do so
could have a material adverse effect on the Company. There can be no assurance
that the Company will have the financial or other resources necessary to
successfully defend a claim of violation of proprietary rights.

      19. Product Liability; Insurance Coverage. The Company may be exposed to
potential product liability claims by consumers. The Company maintains product
liability insurance coverage in an amount up to $4,000,000 per occurrence, up to
a maximum of $4,000,000 in the aggregate, with excess umbrella liability
insurance coverage of $4,000,000. In the event of a product liability claim,
there can be no assurance that such insurance will be sufficient to cover all
possible liabilities. In the event of a successful suit against the Company,
insufficiency of insurance coverage would have a material adverse effect on the
Company.

      20. No Dividends. To date, the Company has not paid any dividends on its
Common Stock and does not expect to declare or pay any dividends in the
foreseeable future.

      21. Litigation. In February 1998, a lawsuit was filed by Ronald Lealos,
the former President of the Company, who resigned in December 1996. The
complaint in the lawsuit alleges various breach of contract claims and seeks
damages in an amount in excess of $1,000,000. A similar suit was filed against
the Company by Mr. Lealos in January 1997 but was dismissed without prejudice as
a prerequisite to a settlement agreement


                                       11
<PAGE>   14

between Mr. Lealos and the Company. The parties did not reach a final
settlement, however, and Mr. Lealos thereupon filed a new complaint against the
Company. Although management of the Company intends to vigorously defend against
the suit, there can be no assurance that the litigation will not be decided
adverse to the Company and that such an adverse decision would not have a
material adverse effect on the Company.

      The Company is also currently involved in litigation brought by Luc Hardy
against the Company and former officer and directors, Ronald Lealos and Eugene
Seymour, and Richard Kalin. This matter involves allegations against the Company
and the individual defendants arising from Mr. Hardy's termination by the
Company in 1994. A jury verdict for the plaintiff, which is not a final
judgment, was rendered on July 25, 1997 in the approximate amount of $740,000.
In October 1997, a hearing was held on the Company's motions to set aside the
jury verdict and for a new trial. The Company is currently awaiting a decision.
There can be no assurance such motions will be granted. A final judgment in this
case consistent with the jury verdict will have a material adverse effect on the
Company.


                                       12
<PAGE>   15

                                 THE COMPANY

      This Prospectus contains forward-looking statements, within the meaning of
the Private Securities Litigation Reform Act of 1995. Forward looking statements
include, but are not limited to, those statements relating to the ability to
raise additional capital, to succeed in pending litigation, to enter into
successful strategic partnerships, to obtain approval of the Company's products
as and when required by the Food and Drug Administration ("FDA") in the United
States and similar regulatory bodies in other countries, and to obtain new
distribution agreements and increase distribution for products under existing
distribution agreements. These forward looking statements are subject to the
business and economic risks faced by the Company and the Company's actual
results could differ materially from those anticipated in these forward-looking
statements as a result of certain factors, including those set forth under this
"The Company" section and under "Risk Factors" and "Management's Discussion and
Analysis."

GENERAL

      The Company develops rapid immunoassays utilizing immunochromatography for
the detection of antibodies to selected pathogens, such as the HIV, the virus
that causes AIDS, and Helicobacter pylori, a bacteria linked to peptic ulcers
and gastric cancer. In addition, the Company develops proprietary specimen
collection devices and other diagnostic devices.

      The Company was incorporated in California in 1986 as E&J Systems, Inc. In
January 1992, the Company merged with and into a Delaware corporation and
changed its name to Saliva Diagnostic Systems, Inc. The Company completed an
initial public offering of its Common Stock in March 1993. In 1994, the
Company's 90% owned subsidiary, Saliva Diagnostic Systems (Asia) Ltd. ("SDS
Asia"), formed Saliva Diagnostic Systems (Singapore) Pte. ("SDS Singapore"). In
1995, the Company purchased the minority interest (10%) in SDS Asia and the
outstanding minority interest (19%) in SDS Singapore. As a result, SDS Asia and
SDS Singapore became wholly owned subsidiaries of the Company. In October 1997,
the Company closed its Singapore facilities and ceased operations of the
subsidiary. In 1995, the Company purchased the minority interest (10%) in Saliva
Diagnostic Systems, UK, Ltd., and as a result this entity became a wholly owned
subsidiary of the Company and was renamed SDS International, Ltd. Unless
otherwise indicated, all references to the Company include the Company and its
wholly owned subsidiaries. The Company's principal executive offices are located
at 11719 NE 95th Street, Vancouver, Washington, 98682.

      The Company has incurred significant operating losses since its inception,
resulting in an accumulated deficit of $28,526,458 at December 31, 1997. Such
losses are expected to continue for the foreseeable future and until such time,
if ever, as the Company is able to attain sales levels sufficient to support its
operations. The Company's independent certified


                                       13
<PAGE>   16

public accountants have included an explanatory paragraph in their reports
stating that the Company's significant operating losses and significant capital
requirements raise substantial doubt about the Company's ability to continue as
a going concern.

      The Company's capital requirements have been and will continue to be
significant. The Company has been dependent on private placements of its debt
and equity securities to fund its capital requirements. The Company is dependent
upon its efforts to raise capital to finance the cost of development,
manufacturing and marketing of its products, to conduct clinical trials and
submissions for FDA approval of its products and to design and develop new
products. Marketing, manufacturing and clinical testing may require capital
resources substantially greater than the resources which will be available to
the Company. There can be no assurance that the Company will be able to obtain
the additional capital resources necessary to implement or continue its
programs, or that such financing will be available on commercially reasonable
terms or at all. See Note 2 of Notes to Consolidated Financial Statements.
Effective with the close of business on March 10, 1998, the Company's securities
were delisted from The Nasdaq SmallCap Market for failure to meet the new
Nasdsaq continued listing requirements. As a result of the Nasdaq delisting, an
investor may find it more difficult to dispose of, or to obtain accurate
quotations as to the price of, the Company's securities. See "Market for Common
Equity and Related Stockholder Matters."

PRODUCTS

      To date, the Company has developed three rapid HIV tests: Sero-Strip HIV,
Hema-Strip HIV and Saliva-Strip HIV, and a rapid H. pylori test: Stat-Simple.
The Company has commenced production and marketing of two medical specimen
collectors in the U.S.: Saliva-Sampler and Omni-Swab, and one medical specimen
collector in the U.K.: Omni-SAL(R). In addition, the Company has conducted
preliminary research that indicates its rapid test format may be expanded to
detect other diseases, such as tuberculosis, measles, malaria, rubella, tetanus,
herpes, chlamydia, mumps, influenza, parvovirus, pertussis, certain cancers,
tumor markers and cardiac disease risk markers. The Company has under
development rapid tests for hepatits and tuberculosis.

RAPID IMMUNOASSAYS. The Company continues to develop rapid immunoassays
utilizing immunochromatography for the detection of antibodies to selected
pathogens, such as HIV, the virus that causes Acquired Immune Deficiency
Syndrome ("AIDS"), and Helicobacter pylori ("H. pylori"), a bacteria linked to
peptic ulcers and gastric cancer. The Company's immunoassays are designed to
require only a few simple steps and minutes to use. The tests produce visual
results in under 20 minutes, and may be used without special equipment, storage
or training. The Company's data and independent evaluations demonstrate that its
tests are generally equivalent in performance to widely used FDA-licensed tests
for HIV.


                                       14
<PAGE>   17

      The Company's rapid tests utilize a capillary flow assay in which all
reagents are provided on solid phases in a dried format (test strip). Buffer
solution is introduced after sample collection. The resulting mixture of sample
and buffer migrate along the test strip by capillary action, reconstituting a
dye conjugate. A red control line will develop at a designated point on the
upper portion of the strip if the assay has been performed properly and if all
reagents are functionally active. The conjugate binds in the presence of
antibodies to pre-applied antigen to form a second red line (positive) at a
designated point on the lower portion of the strip. In the absence of specific
antibodies, a second line does not develop.

      Sero-Strip HIV ("Sero-Strip") analyzes a small amount of serum or plasma
to detect HIV antibodies. Sero-Strip is packaged as a multiple-use kit designed
for professional health care settings where many patients are tested and
specimens may be stored. Results are available in 5 to 15 minutes. The test kit
may be stored without refrigeration for up to 18 months after the date of
manufacture.

      Hema-Strip HIV ("Hema-Strip") is a single use test kit that collects,
processes and analyzes a minute amount of whole blood to detect HIV antibodies.
Sample collection requires only a few seconds. The principles used in the
Hema-Strip test strip are identical to that utilized in Sero-Strip; however, an
added filter traps red blood cells from the whole blood sample permitting the
migration of serum to flow onto the strip and negating the need for the user to
separate serum from the whole blood sample. The test kit may be stored without
refrigeration for up to 18 months after the date of manufacture.

      Saliva-Strip HIV ("Saliva-Strip") is a rapid testing system that collects,
processes and analyzes saliva to detect HIV antibodies. Principles of the test
strip are similar to that used in Sero-Strip and Hema-Strip. The Company expects
to complete development of Saliva-Strip in 1998. The test is currently designed
for single use and incorporates Omni-SAL, the Company's proprietary saliva
collection device. The test is currently designed to obtain results in 10 to 20
minutes. The Company believes Saliva-Strip's temperature stability is similar to
Sero-Strip and Hema-Strip.

      Stat-Simple ("Stat-Simple") is the Company's rapid assay for H. pylori
antibody detection. The device is a modification of Hema-Strip HIV and uses
whole blood for analysis. Results are available in 5 to 20 minutes.

MEDICAL SPECIMEN COLLECTION DEVICES. The Company has commenced production and
marketing of three medical specimen collectors: Omni-SAL (R), Saliva-Sampler and
Omni-Swab.

      Omni-SAL(R) is a saliva collection device with a patented volume indicator
currently sold to several commercial companies for use with their laboratory
assays for the detection of HIV infection, drugs of abuse and cigarette smoking.
It is also used in research to


                                       15
<PAGE>   18



collect saliva samples for studies of infectious diseases such as Hepatitis,
tuberculosis, schistosomiasis, leptospirosis and others.

      Saliva-Sampler is a saliva collection device cleared for marketing in the
United States for the collection of saliva samples for purposes not related to
HIV testing.

      Omni-Swab is a sample collection device comprised of a serrated cotton
swab with an ejectable head. It is used to collect various body fluids and
cells, primarily for the purposes of DNA identification.

      Saliva Filter is a component of the Omni-SAL(R) and Saliva-Sampler that
extracts saliva from the devices' collection pads and also removes debris from
the samples. Due to limited production capability, the Company does not
currently manufacture Saliva Filter and thus, has elected to use filters of
other manufacturers for use with the Omni-SAL(R) and Saliva-Sampler devices.

      The specimens traditionally used for human diagnostic testing and
quantitative measurement of most physiologically active substances, drugs and
toxins in the body, are blood and urine. Substantially all of the assay-based
diagnostic test kits currently available on the market were approved by the FDA
for use with these testing specimens. Political and social factors may create
impediments to the use of rapid tests as diagnostic tools. These factors include
whether certain diagnostic tests, such as HIV antibody tests, should be
conducted without trained specialists and whether rapid tests in nontraditional
testing environments will lead to invasions of privacy. Limitations on the
Company's ability to market rapid tests caused by political and social factors
could have a material adverse effect on the Company's operations.

PRODUCT DEVELOPMENT

      The Company is currently engaged in the development of rapid immunoassays
to detect antibodies to Hepatitis. In 1996, the Company entered into a
codevelopment agreement for rapid Hepatitis tests with a European vaccine
manufacturer, which supplies antigen to the Company for product development. If
a product is ultimately developed, the Company will jointly market such product
and share profits on sales with its European partner.

      In 1996, the Company also entered into a cooperative research and
development agreement (CRADA) with US Navy Medical Research Unit No. 2 to
develop rapid tests for certain tropical diseases, including dengue virus,
leptospirosis and scrub typhus, to which US Naval personnel are exposed in
overseas assignments. Under the agreement, the Company will use antigen supplied
by the US Navy to develop the tests, while the Navy will provide laboratory
space and staff devoted to the project. The Company is obligated to provide
remuneration of up to $19,000 to the Navy in exchange for its services.


                                       16
<PAGE>   19

      The Company has conducted preliminary research that indicates its rapid
test format may be expanded to detect other diseases, such as tuberculosis,
measles, malaria, rubella, tetanus, herpes, chlamydia, mumps, influenza,
parvovirus, pertussis, certain cancers, tumor markers and cardiac disease
markers. Additionally, the Company believes that, in many cases, its tests may
be able to use saliva for analysis as well as blood and serum, although research
has not been completed on this.

      The Company has received an Investigational Device Exemption for
Omni-SAL(R) from the FDA which allows the Company to conduct clinical trials in
the United States for the purposes of determining whether Omni-SAL(R) may be
used for collecting saliva samples for HIV testing in conjunction with certain
laboratory assays. The Company is considering partnering relationships to enable
it to pursue such regulatory approval and subsequently to market Omni-SAL(R) in
the United States as part of a home collection testing system for HIV infection.

      The Company expended approximately $665,500 and $617,400 in research and
development costs, respectively, in fiscal years 1997 and 1996. See Note 1 of
Notes to Consolidated Financial Statements.

      Limited revenues have been generated from sales of the Company's rapid
testing platforms in their current designs. The Company will be required to
devote considerable additional efforts to finalize its products. Satisfactory
completion of development, testing, evaluations, obtaining regulatory approvals
and achieving sufficient production levels of such products will be required
prior to their being available for commercial sale. The Company's products
remain subject to all the risks inherent in the introduction of new diagnostic
products, including unanticipated problems, as well as the possible
insufficiency of funds to continue design and development which could result in
abandonment of or substantial change in the design or development of such
products. There can be no assurance that such products will be successfully
developed, be developed on a timely basis or prove to be as effective as
products based on existing or newly developed technologies. The inability to
successfully complete development, or a determination by the Company, for
financial or other reasons, not to undertake to complete development of any
product, particularly in instances in which the Company has made significant
capital expenditures, could have a material adverse effect on the Company.

MARKETING, SALES AND DISTRIBUTION

      The Company is currently marketing its medical specimen collection devices
(Omni-SAL(R), Saliva-Sampler and Omni-Swab) in many countries and is currently
marketing two of its three HIV rapid tests (Sero-Strip HIV and Hema-Strip HIV)
outside the United States. These HIV rapid tests are not yet approved for
marketing in the United States.


                                       17
<PAGE>   20

      The Company has directed its initial primary marketing and distribution
efforts for its HIV-related products to international markets, principally in
Asia, Latin America, Eastern Europe, the Middle East and Africa. The reported
success in 1996 of certain therapies for AIDS and HIV infection, such as
protease inhibitors and immune boosters, caused the Company to include the
United States and Canada in its primary marketing strategy. Despite the lower
rate of HIV infection in the United States, the Company believes the reported
benefits of early medical intervention for those who can afford treatment will
spur demand for HIV test products in the United States. Sales of the Company's
HIV-related products in the United States are subject to obtaining FDA approval.
See "Manufacturing and Supply" and "Regulation--Domestic Regulation" below. The
Company intends to file with the FDA for approval of its HIV products in 1998.
To proceed with FDA approval, the Company must enter into an alliance with a
strategic partner or have substantial cash reserves. The Company is currently
seeking an alliance.

      For international distribution of its products, the Company's strategy has
been to form direct relationships with in-country distributors of medical
products for both distribution and assistance in obtaining local regulatory
approval. This strategy has proven satisfactory in smaller countries and in
Brazil, Russia, China and Mexico, but less so in other markets, such as
Thailand.

      In November 1997, the Company signed two agreements with BioChem
Immun-Systems, Inc. ("BioChem"), a division of BioChem Pharma, Inc., a
Montreal-based conglomerate with significant international sales in infectious
disease therapies and diagnostics, for international distribution of the
Company's rapid tests for HIV infection. The Company will purchase BioChem's
proprietary peptides for HIV detection in its testing kits. In return, BioChem
will purchase certain of the Company's products for international sales under
its own private label, except in territories where the Company has pre-existing
license arrangements.

      In November 1996, the Company signed a letter of intent to enter into a
distribution agreement with another Canadian company, Advanced Pathology
Services Canada, Inc. ("APS Canada"), for distribution of the Company's products
except Stat-Simple in selected geographic regions outside the United States. On
May 15, 1997, the parties entered into a definitive agreement pursuant to the
letter of intent. The agreement grants to APS Canada a five-year exclusive
distributorship for the designated territory. APS Canada is a division of The
APS Group of Companies, based in London, England. APS Canada provides
specialized human and veterinary medical testing services and maintains a
laboratory exclusively devoted to saliva testing.

      In March 1994, the Company granted a non-exclusive, worldwide license to
Orgenics, Ltd., an Israeli corporation ("Orgenics"), pursuant to which Orgenics
may make or have made diagnostic products incorporating the Company's
Omni-SAL(R) technology, and may use, sell, or license such products worldwide
(the "License Agreement"). The


                                       18
<PAGE>   21

License Agreement expires the later of January 31, 2111 or the date on which any
patents for the Omni-SAL(R) technology expire. Orgenics has paid the Company an
initial licensing fee of $200,000 and will pay 4% royalties on sales of
Orgenics' products which incorporate the Company's Omni-SAL(R) technology. In
the event the Company ceases production of Omni-SAL(R), Orgenics, Ltd. has the
option, pursuant to the License Agreement, to purchase from the Company the
molds and equipment necessary to produce Omni-SAL(R) and would thereafter pay to
the Company 6% royalties on sales of Omni-SAL(R) products produced and sold by
Orgenics, Ltd. The Company understands that Orgenics is not currently exploiting
its rights under the Company's license. The Company is pursuing its rights to
cancel the license and is considering a new distribution arrangement with
Orgenics. There can be no assurance that such an agreement will be concluded or
that Orgenics will manufacture or sell any product which will generate royalties
for the Company.

      The Company also has an agreement with Fremont Novo Sciences to license
and distribute the Company's rapid diagnostic tests through the Tata Merind
Group in India. This agreement allows Fremont Novo Sciences the ability to
manufacture and distribute the Company's strip products at an equivalent quality
to tests produced in the U.S. providing that the pricing is advantageous to the
Company.

      The Company has submitted certain of its products for evaluation to the
World Health Organization ("WHO"), a division of the United Nations that
maintains an inventory of medical goods for impoverished nations and
non-governmental health organizations. Certain smaller countries without their
own regulatory agencies rely on results of WHO evaluations as part of their
approval of products for use and sale in their countries. In 1996 the Company
bid for a contemplated bulk purchase by WHO of the Company's Sero-Strip HIV. In
April 1997, WHO notified the Company that the Sero-Strip HIV was evaluated by
the United Nations AIDS Program and found to conform with its minimum
requirements. Accordingly, WHO agreed to include the Company's Sero-Strip HIV
among the approved products for WHO bulk purchases during the years ending
February 28, 1998 and 1999.

      Sales to Fremont Novo Sciences accounted for approximately 17% of total
product sales in 1997. Sales to three customers, Fitzco, Inc., Osborn
Laboratories and Beacon Diagnostics, Inc. accounted for approximately 20%, 18%,
and 11% respectively, of total product sales in 1996. The loss of sales to any
of the Company's major customers could have a material adverse effect on the
Company's financial condition and results of operations. See Note 1 of Notes to
Consolidated Financial Statements.

      The Company has limited marketing resources. Achieving market acceptance
will require substantial marketing efforts and capabilities. The Company relies
in large part on forming partnerships for marketing and distribution of its
products. There can be no assurance that the Company will form alliances with
potential distributors or that such distributors will be successful in promoting
the Company's products.


                                       19
<PAGE>   22

MANUFACTURING AND SUPPLY

      Omni-SAL(R) is manufactured at Wesley Coe, Ltd. in the U.K. and
distributed from SDS International, Ltd., while Omni-Swab and Saliva-Sampler are
manufactured at MML Diagnostic Packaging, Inc. ("MML") in the United States and
distributed by the Company. Manufacturers, if located in the United States or if
manufacturing products which are to be sold in the United States, must comply
with the FDA's good manufacturing practices ("GMP") and pass pre-approval
inspections by the FDA and periodic GMP inspections. The Company has been
advised by MML that MML is in compliance with GMP and other FDA regulations.
There can be no assurance that MML will continue to comply with GMP, that the
Company will be able to locate additional manufacturers that comply with GMP or
secure agreements with such manufacturers on terms acceptable to the Company.
There can be no assurance that MML will be able to meet the Company's
requirements or that MML will continue to manufacture Omni-Swab or
Saliva-Sampler on terms acceptable to the Company.

      In 1996, the Company began to design and build equipment for automated
production of its rapid tests at its Vancouver, Washington facility in the
United States. The Company must meet certain conditions, including compliance
with applicable FDA requirements, in order to manufacture its tests at its
Vancouver facility and to export its products from there. In an effort to
minimize capital expenditures and related costs, the Company has determined to
forestall full use of its production facilities in Vancouver. The Company
intends to outsource all manufacturing of its products in 1998. Following
outsourcing of manufacturing, the Company expects to use the equipment at its
Vancouver, Washington facility solely for research and development purposes.

      The Company believes that most of the components used in the manufacture
of its proposed products are currently available from numerous suppliers located
in the United States, Europe and Asia. The Company believes, however, that
certain components are available from a limited number of suppliers. Although
the Company believes that it will not encounter difficulties in obtaining these
components, there can be no assurance that the Company will be able to enter
into satisfactory agreements or arrangements for the purchase of commercial
quantities of such components. The failure to enter into agreements or otherwise
arrange for adequate or timely supplies of components and the possible inability
to secure alternative sources of components could have a material adverse effect
on the Company's ability to manufacture its products. In addition, development
and regulatory approval of the Company's products in the United States are
dependent upon the Company's ability to procure certain components and certain
packaging materials from FDA-approved sources. Since the FDA approval process
requires manufacturers to specify their proposed suppliers of certain components
in their premarket approval applications ("PMAs"), if any such component were no
longer available from the specified supplier, FDA approval of a new supplier
would be required, resulting in potential manufacturing delays.


                                       20
<PAGE>   23

REGULATION

DOMESTIC REGULATION

FOOD AND DRUG ADMINISTRATION. In the United States, under the Federal Food,
Drug, and Cosmetics Act (the "FDC Act"), the FDA regulates all aspects,
including manufacture, testing, and marketing of medical devices that are made
or distributed domestically. Two of the Company's domestically made and/or
distributed products, Omni-Swab and Saliva-Sampler, have received FDA clearance
for domestic distribution for certain limited purposes. See " -- Manufacturing
and Supply".

      All medical devices are categorized by the FDA as Class I, Class II, or
Class III. Class I devices are subject only to general control provisions of the
FDC Act, such as purity, labeling and GMP. Class II devices are required to also
ensure reasonable safety and efficacy through performance standards and other
controls. Class III devices must, in addition to fulfilling all other provisions
of the FDC Act, meet extensive and rigorous FDA standards that may require
clinical trials.

      A manufacturer of medical devices which can establish that a new device is
"substantially equivalent" to a legally marketed Class I or Class II medical
device or to a Class III medical device for which the FDA has not required a
premarket approval application ("PMA") can seek FDA marketing clearance for the
device by filing a 510(k) Premarket Notification ("510(k) Notice"). The 510(k)
Notice may have to be supported by various types of information, including
performance data, indicating that the device is as safe and effective for its
intended use as a legally marketed predicate device. In February 1998, the
Company filed a 510(k) Notice for its Stat-Simple H.pylori tests.

      The Company is pursuing several strategies for initiating FDA review of
its products not already approved or cleared for domestic distribution. These
strategies include alliances with other companies and selling limited licensing
rights to the Company's products to companies who agree to seek FDA approval for
them. The Company may also directly apply for FDA approval of those products.

      In January 1995, the FDA classified Omni-Swab as a Class I medical device.
In August 1995, in response to a 510(k) Notice made by the Company, the FDA
approved Saliva-Sampler as a Class II device, accepting the Company's contention
that, under the 510(k) application guidelines, Saliva-Sampler demonstrated
"substantial equivalency" to other non-saliva collection devices already in use
for general purposes.

      The Company believes that all of its HIV products would, if submitted to
the FDA, fall under the Class III category of medical devices. This includes the
Company's saliva collection device, Omni-SAL(R), if marketed as a specimen
collection device for HIV testing. The Company believes its proposed assay for
H.pylori, however, could be


                                       21
<PAGE>   24

approved as a Class II device. There is no assurance that the Company's position
with respect to these products will prevail with the FDA.

      If human clinical trials of a proposed device are required, and the device
presents "significant risk," the manufacturer or distributor of the device will
have to file an Investigational Device Exemption ("IDE") with the FDA prior to
commencing human clinical trials. The IDE must be supported by data, typically
including the results of animal and mechanical testing. If the IDE application
is approved, human clinical trials may begin at a specific number of
investigational sites and are limited to the number of subjects approved by the
FDA. The Company has generated substantial supporting data required for the IDE
for its immunoassays for diseases and conditions such as HIV infection and
schistosomiasis.

      In 1994, the FDA granted the Company's request to classify Omni-SAL(R)
under the IDE provisions of the FDC Act, allowing the Company to manufacture and
distribute Omni-SAL(R) for the limited purpose of demonstrating the efficacy of
using saliva as a diagnostic medium for HIV antibody testing.

      In 1995, the FDA authorized the Company to begin clinical trials in the
United States to determine whether Omni-SAL(R) could be used as a saliva
collection device for HIV testing in conjunction with certain laboratory assays.
The Company has not conducted any clinical trials for Omni-SAL(R) in the United
States due to lack of financing for such trials, although preclinical data has
been generated for the device in the United States and foreign countries.

      The process of obtaining FDA approval is costly and time-consuming, and
there can be no assurance that any of the Company's products not yet approved
will be approved by the FDA or other regulatory agencies. Delays in obtaining
regulatory approvals may materially adversely affect the development, testing or
marketing of the Company's products and the ability of the Company to generate
product revenues therefrom. If and when the Company's products are approved by
the FDA, they will be subject to continuing regulation by the FDA and state and
local agencies. The failure to comply with these regulations can result in
regulatory action, including warning letters, product seizure, injunction,
product recalls, civil fines and prosecution. An FDA enforcement action could
have a material adverse effect on the Company. To date, the Company has not been
the subject of any FDA enforcement actions. The FDA also audits clinical studies
for compliance with applicable requirements.

OVERSEAS REGULATION AND DISTRIBUTION.

      Regulatory approval for medical devices vary from country to country. Some
countries do not require regulatory approval when registering a product for sale
to the private sector. Others rely on evaluations by agencies such as the WHO.
The Company has submitted Sero-Strip to WHO for evaluation, and intends to
submit its other HIV tests


                                       22
<PAGE>   25

to WHO as well. WHO's evaluation of Sero-Strip has been completed and WHO has
found that Sero-Strip meets its standards for rapid test performance.

      The following lists the Company's products, where the products are
distributed and where regulatory approval is pending.

      1. Omni-SAL(R) is being distributed or has been approved as a sample
collection device for HIV testing and other uses in the United Kingdom and
various other countries. The Company has submitted Omni-SAL(R) for approval as a
sample collection device for HIV testing and other uses in South Africa, and
plans to apply for approval in several other European and Middle Eastern nations
where such approval is required. Approval in South Africa is pending, subject to
the results of a clinical trial with the National Institute of Virology in
Pretoria, South Africa.

      2. Omni-Swab is distributed in the United States and in many of the
countries in which Omni-SAL(R) is distributed.

      3. Saliva-Sampler is distributed in the United States and Israel.

      4. Sero-Strip was approved for use and sale in Russia by the Russian
Ministry of Health in 1996, and has received a certificate of free sale from the
U.K. government. It is currently registered in Brazil, India, Kenya, Romania,
and Malaysia, and is pending approval (where needed) in other Asian, European,
and Latin American countries. The Center for Disease Control in Atlanta, Georgia
has concluded studies using Sero-Strip and has purchased such tests for research
use in Atlanta and for epidemiological purposes overseas.

      5. Hema-Strip has been approved for use and sale in Russia. In April 1996,
Hema-Strip received a certificate of free sale from Singapore, and in June 1997,
the Company received a similar certificate in the U.K. This test is also
approved for sale in Brazil, Chile, Romania, Kenya, China, and Malaysia.

      6. Saliva-Strip is in final stages of development in its current form.
When completed, the Company intends to submit the device for approval (if
needed) and distribution in the same areas where its other products are sold.
There is no assurance, however, that any such approvals will be timely obtained
or obtained at all. The device has been issued a certificate of free sale in the
U.K.

      7. Stat-Simple is the subject of a 510(k) Notice filed by the Company with
the FDA in February 1998. The product is on sale in Italy, Denmark, Austria,
Saudi Arabia and Mexico, and has been issued a Certificate of Free Sale in the
U.K.


                                       23
<PAGE>   26

COMPETITION

      The market in which the Company operates, saliva and blood-based
collection and diagnostic testing, is highly competitive. The Company is aware
of certain entities, including ChemTrak, Inc., Epitope, Inc., Quidel, Inc. and
Trinity Biotech, plc and specialized biotechnology firms, as well as
universities and other research institutions, which have developed or are
developing technologies and products which are competitive with Omni-SAL(R) and
the Company's products under development. Many of these competitors are
established and have substantially greater research, marketing and financial
resources than the Company. The Company expects that the number of products
competing with its products will increase as the perceived benefits of
saliva-based testing become more widely recognized, which may result in lower
prices of the Company's products and reduced revenues. In the biotechnology
industry, technological change and obsolescence is rapid and frequent. There can
be no assurance that the Company will be able to compete successfully with its
competitors, keep pace with technological changes or avoid product obsolescence.

INTELLECTUAL PROPERTY

      The Company has applied for patents in the United States and other
countries on certain aspects relating to Omni-SAL(R), a saliva collection
device, and Omni-Swab, a medical specimen collection device. To date, ten such
patents have been awarded, four in the United States, and six in other
countries. Expiration dates for the patents range from 2008 to 2012. The Company
intends to seek other patent protections in the United States and other
countries for certain aspects relating to its collection devices and rapid test
technology. No assurance can be given that patents will be issued to the Company
pursuant to its patent applications in the United States and abroad, or that the
Company's patent portfolio will provide the Company with a meaningful level of
commercial protection.

      Immuno chromatography, the principle on which the Company's rapid tests
are based, is a technology covered by existing patents. The Company has
purchased a license from the principal patent holder, Unilever PLC of the U.K.,
to whom royalty payments are due for all rapid tests sold. To obtain the
license, the Company paid approximately $50,000 and will be responsible for
royalty fees equal to 5% of the net sales in all territories where the Unilever
patent is enforceable. Products covered by the license include those related to
HIV, H.pylori, Tuberculosis and Hepatitis A. Additional analytes may be
negotiated as they become available.

      The Company also depends on trade secrets and proprietary information to
protect much of the technology that it has developed. The Company has entered
into confidentiality agreements with its employees, certain third party
suppliers, potential customers, joint venture partners, distributors and
consultants. Despite such efforts, there can be no assurance that such
confidentiality and the protection it may afford can be maintained.


                                       24
<PAGE>   27

      The Company believes that patent and trade secret protection are important
to its business. However, the issuance of a patent and the existence of trade
secret protection does not in itself ensure the Company's success. Competitors
may be able to produce products competing with a patented Company product
without infringing on the Company's patent rights. Issuance of a patent in one
country generally does not prevent manufacture or sale of the patented products
in other countries. The issuance of a patent to the Company is not conclusive as
to validity or as to the enforceable scope of the patent. The validity or
enforceability of a patent can be challenged by litigation after its issuance,
and if the outcome of such litigation is adverse to the owner of the patent, the
owner's rights could be diminished or withdrawn. Additionally, trade secret
protection does not prevent independent discovery and exploitation of a secret
product or technique by other parties.

      A large number of individuals and commercial enterprises seek patent
protection for technologies, products and processes in fields related to the
Company's area of product development. To the extent such efforts are
successful, the Company may be required to obtain licenses in order to
accomplish certain of its product strategies. There can be no assurance that
such licenses will be available to the Company or available on acceptable terms.
The Company is aware of certain filed patents issued to developers of diagnostic
products with potential applicability to the Company's diagnostic technology.
There can be no assurance that the Company would prevail if a patent
infringement claim were to be asserted against it.

EMPLOYEES

      As of May 18, 1998, the Company employed 17 full-time persons, including
two engaged in research and development, one in regulatory affairs, five in
manufacturing, three in sales and marketing, and six in administration. None of
the Company's employees are covered by collective bargaining agreements, and the
Company believes its relations with its employees are good.

PROPERTIES

      The Company's executive offices and laboratory facility are located at
11719 NE 95th Street, Vancouver, Washington in an approximately 12,000 square
foot facility. The premises are occupied pursuant to a lease with an
unaffiliated party which expires in August 2002. The Company believes this
facility is adequate for its purposes.

LEGAL PROCEEDINGS

      Hardy v. Saliva Diagnostic Systems, Inc., Ronald L. Lealos, Eugene Seymour
and Richard S. Kalin, was filed in United States District Court, District of
Connecticut in August 1994 by Luc Hardy, a former director and officer of the
Company. The complaint


                                       25
<PAGE>   28

alleges several causes of action against the Company and individual defendants,
including former directors and officers of the Company, including breach of Mr.
Hardy's employment agreement with the Company, intentional interference with
contract by the individual defendants, slander and deceptive trade practices,
all arising from his employment termination by the Company. The complaint seeks
damages and punitive damages in an unspecified amount. A jury verdict for the
plaintiff, which is not a final judgment, was rendered on July 25, 1997 in the
approximate amount of $740,000. In October 1997, a hearing was held on the
Company's motions to set aside the jury verdict and for a new trial. The Company
is currently awaiting a decision on these motions.

      In January 1997, Lealos v. Saliva Diagnostic Systems, Inc. was filed in
Superior Court in Clark County in the State of Washington by Ronald Lealos,
former President and CEO of the Company. The complaint in the lawsuit alleged
various breach of contract claims. This lawsuit was dismissed without prejudice
as a prerequisite to a settlement agreement between Mr. Lealos and the Company.
The parties did not reach a settlement and, in February 1998, Mr. Lealos filed a
complaint against the Company in the same court which alleges substantially the
same claims. The complaint seeks damages in the approximate amount of
$1,000,000. Management of the Company intends to vigorously defend the Company.
In March 1998, the Company filed a response to the complaint and asserted
numerous counterclaims against Mr. Lealos, including breach of fiduciary duty
and conversion.

      Other than that set forth above, to the best knowledge of the Company, no
other material legal proceedings are pending or have been threatened. See
"Risk Factors - Litigation."

                     MANAGEMENT'S DISCUSSION AND ANALYSIS

GENERAL

      Since July 1990, the Company has been engaged almost exclusively in
research and development activities focused on developing proprietary saliva
based collection devices and rapid assays for infectious diseases. Other than
sales of the Company's collection devices, the Company has not yet commenced any
significant product commercialization. The Company has incurred significant
operating losses since its inception, resulting in an accumulated deficit of
$28,526,458 at December 31, 1997 and $29,676,879 at March 31, 1998. Such losses
are expected to continue for the foreseeable future and until such time, if
ever, as the Company is able to attain sales levels sufficient to support its
operations. Despite the issuance and sale of the Company's Series 1998-A
Convertible Preferred Stock, stated value $1,000 per share (the "1998-A
Preferred Stock"), substantial additional financing will be required in 1998.
There can be no assurance that such financing will be achieved or that
financings will be on terms favorable to the Company. The Company's significant
operating losses and significant capital requirements raise substantial doubt


                                       26
<PAGE>   29

about the Company's ability to continue as a going concern. See "Description of
Business - General."

RESULTS OF OPERATIONS

      FISCAL YEAR 1997 COMPARED TO FISCAL YEAR 1996

REVENUES. The Company's revenues consist of product sales. Revenues increased
92% to $1,422,296 in 1997 from $740,650 in 1996. The increase in product sales
revenue was primarily attributable to increasing demand for the Company's rapid
testing systems. Additionally, in 1997 sales of Sero-Strip HIV and Hema-Strip
HIV increased as the Company had more approvals to sell these two products in
countries outside the United States. Sales to one customer represented
approximately 17% of total revenues in 1997. Sales to three customers accounted
for approximately 20%, 18% and 11%, respectively of total revenues in 1996.

COST OF PRODUCTS SOLD. Costs of products sold increased to $1,426,638 (100.3% of
product sales) in 1997 from $894,841 (125% of product sales) in 1996. Costs of
products sold increased as a percentage of product sales due to increased
manufacturing overhead, larger square footage of manufacturing facilities and an
increase in the number of manufacturing personnel in early 1997. During 1997,
the Company reviewed the production efficiency, costs and regulations related to
its manufacturing facilities, and as a result of this review, the Company
decided to close its Singapore manufacturing facility. The Company expects the
costs of products to decrease in 1998 due to the closure of facilities in
Singapore and reduction in personnel.

RESEARCH AND DEVELOPMENT EXPENSES. Research and development expenses increased
8% to $665,475 in 1997 from $617,358 in 1996. In 1996, research and development
efforts were expanded for product development for Saliva-Strip and Stat-Simple
and rapid tests for hepatitis. In 1997, research and development efforts were
focused primarily on Stat-Simple in order to submit this product to the FDA for
marketing clearance, which occurred in February 1998. Additionally, in 1997, the
Company was focused on cost controls in all departments, including research and
development, and thus intentionally reduced these costs.

SELLING, GENERAL AND ADMINISTRATIVE EXPENSES. Selling, general and
administrative expenses increased 34.7% to $5,270,955 in 1997 from $3,911,587 in
1996. The increase was primarily the result of increased legal fees related to
litigation matters and securities filings and compliance matters in 1997 and
compensation expenses related to the grant of stock options in 1997, offset by
the result of cost cutting programs put in place to reduce administrative
expenses. The Company expects selling, general and administrative expenses to
decrease in 1998 due to the closure of facilities in Singapore and reduction in
personnel.


                                       27
<PAGE>   30


WRITE-OFF OF GOODWILL. In September 1995, the Company purchased the minority
interest in its 90% owned subsidiary, Saliva Diagnostic Systems (Asia) Ltd.
("SDS Asia") and the minority interest in SDS Asia's 83% owned subsidiary. The
transaction was accounted for as a purchase and resulted in an excess of
purchase price over net assets acquired of $600,000. In 1996, the Company
reviewed its Singapore operations and concluded that the use of Singapore as a
primary manufacturing source was no longer required. Accordingly, the Company
assessed the recoverability of the remaining goodwill associated with the
purchase of SDS Asia, which resulted in a write-off of the remaining goodwill,
$540,000, at December 31, 1996.

RESTRUCTURING EXPENSE. Results of operations of 1997 included a charge
associated with a restructuring plan designed to reduce costs and improve
manufacturing and operational efficiencies. Under the plan, the Company closed
its Singapore manufacturing operations in October 1997. The Company plans to
out-source manufacturing previously performed in Singapore to qualified sources
and locations. Total costs accrued in connection with the restructuring at the
end of the third quarter of 1997 were $194,000 and included approximately
$100,000 related to termination of employees, approximately $37,000 associated
with the settlement of the lease obligation in Singapore, $47,000 for other
costs related to closing the Singapore location and $10,000 non-cash charge for
the write off of leasehold improvements. The change in the restructuring reserve
during the fourth quarter of 1997 consisted of approximately $61,000 of
additional employee termination costs and a $24,000 charge related to a portion
of the cumulative foreign translation account related to the Singapore
operation.

INTEREST EXPENSE AND LOAN FEES. Interest expense increased to $413,993 in 1997
from $28,861 in 1996. In March 1997, in connection with the sale of $1.5 million
of 7.5% Convertible Debentures, due February 28, 1999 (the "Debentures"), a
discount of $375,000 was recorded, resulting from an allocation of proceeds to
the discounted conversion feature. This discount was written off to interest
expense at June 30, 1997, in connection with the conversion of the Debentures.

INCOME TAXES. The Company is in a net deferred tax asset position and has
generated net operating losses to date. Accordingly, no provision for or benefit
from income taxes has been recorded in the accompanying statements of
operations. The Company will continue to provide a valuation allowance for its
deferred tax assets until it becomes more likely than not, in management's
assessment, that the Company's deferred tax assets will be realized. See Note 9
of Notes to Consolidated Financial Statements.


                                       28
<PAGE>   31

      FIRST QUARTER OF 1998 COMPARED TO FIRST QUARTER OF 1997

REVENUES. The Company's revenues consist of product sales. Revenues decreased
13% to $197,578 in the first quarter of 1998 from $227,034 in the first quarter
of 1997. The decrease in revenue was primarily attributable to delays in the
transfer of manufacturing to outsourced manufacturing facilities. See "Cost of
products sold" below. Sales to three customers represented approximately 68% of
total revenues in the first quarter of 1998, and sales to four customers
accounted for approximately 68% of total revenues in the first quarter of 1997.

COST OF PRODUCTS SOLD. Costs of products sold decreased to $252,700 (128% of
product sales) in the first quarter of 1998 from $259,641 (114% of product
sales) in the first quarter of 1997. Costs of products sold increased as a
percentage of product sales due to reduced production levels in the first
quarter of 1998.

The Company has designed and built equipment for automated production of its
rapid tests at its Vancouver, Washington facility. However, the Company
currently intends to outsource all manufacturing of its products.

RESEARCH AND DEVELOPMENT EXPENSES. Research and development expenses decreased
11% to $172,379 in the first quarter of 1998 from $194,712 in the first quarter
of 1997, primarily as a result of reduced payroll and related expenses. Over the
last year, the Company has focused on cost controls in all departments,
including research and development, and thus intentionally reduced these costs.

SELLING, GENERAL AND ADMINISTRATIVE EXPENSES. Selling, general and
administrative expenses decreased 32% to $646,377 in the first quarter of 1998
from $953,913 in the first quarter of 1997, primarily as a result of the closure
of facilities in Singapore and a reduction in the number of administrative
personnel.

INTEREST EXPENSE AND LOAN FEES. Interest expense decreased to $1,405 in the
first quarter of 1998 from $8,578 in the first quarter of 1997.

INCOME TAXES. The Company is in a net deferred tax asset position and has
generated net operating losses to date. Accordingly, no provision for or benefit
from income taxes has been recorded in the accompanying statements of
operations. The Company will continue to provide a valuation allowance for its
deferred tax assets until it becomes more likely than not, in management's
assessment, that the Company's deferred tax assets will be realized.

LIQUIDITY AND CAPITAL RESOURCES

      Since inception, the Company has financed its capital requirements through
proceeds from its public offering of stock in March 1993 and the exercise of
common stock


                                       29
<PAGE>   32

purchase warrants pursuant to such offering, proceeds from sales of convertible
debentures, proceeds from private placements of Common Stock, and the exercise
of common stock purchase warrants and stock options. In March 1997, the Company
raised net proceeds of approximately $1,380,000 (net of issuance costs of
$120,000) from the private sale of the Debentures. In June 1997 and August 1997,
the Company entered into three separate common stock subscription agreements for
the issuance and sale of a total of 4,082,905 shares of Common Stock for an
aggregate purchase price of $2,063,000, net of offering costs. In January 1998,
the Company entered into a Securities Purchase Agreement with an investor for
the issuance and sale of the 1998-A Preferred Stock for an aggregate purchase
price of $1,380,000, net of offering costs.

      Cash used in operating activities was $3,896,427 in 1997. This was
primarily a result of a net loss of $6,612,212, offset by the non-cash write-off
of the discounted conversion feature of the Debentures, the amount of accrued
interest on the Debentures which was converted to Common Stock, and a non-cash
charge for compensation expense recorded on issuance of stock options. Cash used
in operating activities was $1,099,166 in the first quarter of 1998, which was
primarily a result of a net loss of $824,968, adjustments for depreciation and
amortization, and a decrease in accounts payable and accrued expenses. Accounts
payable and accrued expenses decreased in the first quarter of 1998 due to
reduced production volume resulting from delays in the transfer of manufacturing
to outsourced manufacturing facilities.

      Cash used in investing activities in 1997 was $14,438 and included the
purchase of manufacturing equipment totaling $62,720. Cash provided by investing
activities in the first quarter of 1998 was $29,946, which primarily represented
proceeds from sale of property and equipment in Singapore.

      Cash provided by financing activities in 1997 was $3,405,797. This was the
result of net proceeds of $2,063,414 from the issuance of Common Stock in July
and August 1997 and net proceeds of $1,380,000 from the sale of the Debentures.
Cash provided by financing activities in the first quarter of 1998 was
$1,373,119, which was primarily a result of net proceeds from the sale of the
1998-A Preferred Stock.

      In March 1997, the Company received net proceeds of approximately
$1,380,000 (net of issuance costs of $120,000) from the sale of the Debentures.
In connection with the issuance of the Debentures, the Company also issued to
Grayson & Associates, Inc. warrants to purchase up to 89,552 shares of the
Company's Common Stock for a purchase price of $1.34 per share on or before
March 14, 2002. In May and June 1997, the holders of the Debentures agreed to an
acceleration of conversion and converted the Debentures into a total of
1,736,824 shares of Common Stock, plus interest in the form of 27,604 shares of
Common Stock. In October 1997 and January 1998, the holders of the Debentures
exercised their rights to receive an additional approximately 1,560,000 shares
after certain conditions had been met. No further rights or obligations for the
issuance of Common Stock are outstanding under the terms of the Debentures.


                                       30
<PAGE>   33

      A discount was recorded at the date of issuance of the Debentures,
resulting from an allocation of proceeds to the discounted conversion feature,
which was to be amortized to interest expense over the conversion period.
Additionally, financing costs related to these Debentures were deferred and
amortized, using the effective interest method, over the term of the Debentures.
The discount and remaining unamortized financing costs of $375,000 and $99,800,
respectively, were written off to interest expense and additional paid in
capital, respectively, upon the early conversion of the Debentures.

      In June and August 1997, the Company entered into three separate common
stock subscription agreements pursuant to which the Company issued and sold a
total of 4,082,905 shares of its Common Stock for an aggregate purchase price of
$2,063,000, net of offering costs. As a finder's fee, the Company paid $104,800
in cash and warrants to purchase 161,600 shares of the Common Stock for an
exercise price of $0.50 per share, and 33,032 shares of the Common Stock for an
exercise price of $0.72656 per share, all of which expire on June 30, 2002. Also
in connection with the private placement, the Company issued warrants to
purchase up to 100,000 shares of the Company's Common Stock, exercisable at any
time from January 1, 1998 to January 1, 2003, at an exercise price of $1.00 per
share.

      In connection with the private placement, the Company also entered into
separate registration rights agreements under each of which the Company is
required to file a registration statement covering resales of shares of the
Common Stock. A registration statement on Form S-3 covering resales of such
shares was declared effective on September 30, 1997. Because the Company is no
longer eligible to file on Form S-3 due to the delisting of the Company's
securities from Nasdaq, the Company has filed a post-effective amendment to the
registration statement.

      On January 26, 1998, the Company entered into a Securities Purchase
Agreement with an investor for the issuance and sale of the 1998-A Preferred
Stock. Pursuant to the Securities Purchase Agreement, the Company sold a total
of 1,500 shares of the 1998-A Preferred Stock to the investor for an aggregate
purchase price of $1,500,000. The investor is entitled to receive a number of
shares of the Company's Common Stock, upon conversion of the 1998-A Preferred
Stock as determined by dividing the purchase price of the 1998-A Preferred Stock
by the lesser of (i) $0.3375, and (ii) 80% of the average closing bid price of
the Common Stock for the five trading days prior to conversion. The timing of
conversion is subject to certain restrictions. The Securities Purchase Agreement
provides for an additional offering of up to $1,500,000 of an additional series
of the Company's preferred stock may be purchased at the investor's option upon
substantially the same terms as the issuance and sale of the 1998-A Preferred
Stock. This option must be exercised by the investor on or prior to September
26, 1998. See "Description of Securities - 1998-A Preferred Stock."

      The 1998-A Preferred Stock is convertible into Common Stock of the Company
at a beneficial conversion ratio, and as a result, a discount of $300,000 was
recorded at the date of issuance of the 1998-A Preferred Stock. The discount
will be accreted to deemed


                                       31
<PAGE>   34

preferred dividends over the conversion period, which ends July 25, 1998.
Additionally, the Company incurred offering costs related to the 1998-A
Preferred Stock totaling approximately $120,000. These offering costs are
reflected as a discount to the 1998-A Preferred Stock and will be accreted as
deemed preferred dividends over the conversion period, which ends July 25, 1998.
At March 31, 1998, $197,708 had been recorded as deemed dividends, relating to
the beneficial conversion ratio and offering costs. Additionally, the 1998-A
Preferred Stock may be redeemed at the option on the holders under certain
conditions, as specified in the Securities Purchase Agreement, which are outside
the control of the Company. Accordingly, the 1998-A Preferred Stock has not been
classified as stockholders' equity at March 31, 1998.

      In connection with the issuance and sale of the 1998-A Preferred Stock,
the Company also entered into a separate registration rights agreement with the
investor under which the Company is required to file a registration statement
covering resales of shares of the Common Stock issuable upon conversion of the
1998-A Preferred Stock, which registration statement must be filed on or before
February 26, 1998 and be declared effective by the Securities and Exchange
Commission by April 26, 1998. A registration statement on Form S-3 was filed on
February 26, 1998. Because the Company is no longer eligible to file on Form S-3
due to the delisting of the Company's securities from Nasdaq, the Company has
filed an amendment to the registration statement.

      In connection with the issuance of the 1998-A Preferred Stock, the Company
paid a cash fee of 7.5% of the gross proceeds and attorney's fees equal to 0.5%
of the gross proceeds. The Company also issued warrants to purchase up to
750,000 shares of Common Stock at an exercise price of $0.3375 per share, which
expire on January 26, 2003. In addition, the Company has agreed to issue
additional warrants to purchase up to 250,000 shares of Common Stock if and when
the investor exercises its option to purchase an additional series of the
Company's preferred stock.

      The Company's capital requirements have been and will continue to be
significant. The Company currently has an accumulated deficit due to its history
of losses. The Company is dependent upon its effort to raise capital to finance
its future operations, including the cost of manufacturing and marketing of its
products, to conduct clinical trials and submissions for FDA approval of its
products and to continue the design and development of its new products.
Marketing, manufacturing and clinical testing may require capital resources
substantially greater than the resources available to the Company. Despite the
issuance and sale of the 1998-A Preferred Stock, substantial additional
financing will be required in 1998. There can be no assurance that such
financing will be achieved or that financings will be on terms favorable to the
Company. The Company will continue to seek public or private placement of its
equity securities and corporate partners to develop products. The Company's
future capital needs will depend upon numerous factors, including the progress
of the approval for sale of the Company's products in various countries,
including the United States, the extent and timing of the acceptance of the
Company's products, the cost of marketing and manufacturing activities and the
amount of revenues generated from operations, none of which can be predicted
with


                                       32
<PAGE>   35

certainty. The Company's significant operating losses and capital requirements
raise substantial doubt about the Company's ability to continue as a going
concern.

YEAR 2000 ISSUE

      The Company is aware of the critical business issue of how existing
computer software programs and operating systems will accommodate the Year 2000.
Programs and systems that do not properly recognize date sensitive information
upon the roll-over of the two-digit year value to "00" could generate erroneous
data or cause systems to fail. Management is in the process of determining the
impact the Year 2000 issue will have on the Company, both directly and
indirectly through third parties such as suppliers. The Company intends to send
a written request to its suppliers for an assessment of the impact the Year 2000
issue might have on their activities. Based upon information currently
available, the Company does not expect the costs of addressing the Year 2000
issue will have a material impact on the Company's financial position or on its
results of operations.


                                       33
<PAGE>   36

                    MARKET FOR REGISTRANT'S COMMON EQUITY
                      AND RELATED STOCKHOLDER MATTERS

      Until the close of market on March 10, 1998, the Company's common stock
was included in The Nasdaq SmallCap Market under the symbol "SALV." The
following table sets forth the high and low bid quotations as reported by the
OTC Bulletin Board for the period March 10, 1998 through March 31, 1998, and as
reported by The Nasdaq SmallCap Market for the other periods indicated. The
market quotations represent prices between dealers, do not include retail
markup, markdown or commissions, and may not represent actual transactions.

<TABLE>
<CAPTION>


                              HIGH           LOW
<S>                         <C>           <C>
1998

March 10 - March 31         $  0.31       $   0.15
January 1 - March 10           0.44           0.22

1997

First Quarter               $  2.06       $   1.16
Second Quarter                 1.78           0.94
Third Quarter                  1.47           0.63
Fourth Quarter                 1.22           0.31

1996

First Quarter               $  2.44       $   0.47
Second Quarter                 5.00           1.63
Third Quarter                  3.13           1.31
Fourth Quarter                 2.34           1.06
</TABLE>

      Effective with the close of the market on March 10, 1998, the Company's
securities were delisted from The Nasdaq SmallCap Market for failure to meet the
new Nasdsaq continued listing requirements. Trading in the Company's securities
is and will be conducted in the over-the-counter market on the OTC Bulletin
Board, an electronic bulletin board established for securities that do not meet
the Nasdaq listing requirements, or in what are commonly referred to as the
"pink sheets." As a result of the Nasdaq delisting, an investor may find it more
difficult to dispose of, or to obtain accurate quotations as to the price of,
the Company's securities. In addition, the Company's securities are subject to
so-called "penny stock" rules that impose additional sales practice requirements
on broker-dealers who sell such securities. Consequently, removal from the
Nasdaq system may affect the ability or willingness of broker-dealers to sell
the Company's securities and the ability of purchasers of the Company's
securities to sell their securities in the secondary market.

      There were approximately 450 shareholders of record and 8,700 beneficial
owners of the Company's common stock at May 18, 1998. There were no cash
dividends declared


                                       34
<PAGE>   37

or paid in fiscal years 1997 or 1996. The Company does not anticipate declaring
such dividends in the foreseeable future.

      Warrants to purchase approximately 1.4 million shares of the Company's
common stock at $1.25 per share, which were set to expire on March 31, 1998 and
have been extended to June 30, 1998, traded on The Nasdaq SmallCap Market under
the symbol "SALVW" until the close of market on March 10, 1998.

                                   MANAGEMENT

                            DIRECTORS OF THE COMPANY

<TABLE>
<CAPTION>


      NAME OF DIRECTOR           AGE                POSITION WITH THE COMPANY
      ----------------           ---                -------------------------
      <S>                         <C>       <C>
      Kenneth J. McLachlan        51        President, Chief Executive Officer, Chief
                                            Financial Officer, Chief Accounting Officer
                                            and Director
      Hans R. Vauthier, Ph.D.     73        Director
      Eric F. Stoer, Esq.         53        Director
</TABLE>

      The following are brief summaries of the business experience of the
directors of the Company, including, where applicable, information as to other
directorships held by each of them. There are no family relationships among any
of the directors and executive officers of the Company.

KENNETH J. MCLACHLAN has served on the Board of Directors since December 1995.
In December 1996, Mr. McLachlan was appointed by the Board to serve as the
Company's President and Chief Executive Officer. Mr. McLachlan has served as the
Company's Chief Financial Officer since June 1996, and as the Company's Chief
Financial Officer and Chief Accounting Officer since September 1997. In 1993,
Mr. McLachlan founded an international finance and consulting firm in the
Netherlands. From 1988 to 1993, Mr. McLachlan served as Chief Financial Officer
and Executive Vice President of Corange - Boehringer Mannheim, a privately-owned
multinational health care group.

HANS R. VAUTHIER, PH.D. was appointed to the Board of Directors of the Company
in May 1996 to fill the vacancy created by the resignation of Dr. Eugene
Seymour. Since 1981, Dr. Vauthier has been a principal of Vauthier & Partner
A.G., a consulting firm located in Basle, Switzerland which assists
pharmaceutical companies in discovering and developing new products. Dr.
Vauthier received his doctorate in economics and business administration from
the University of Bern in Switzerland.

ERIC F. STOER, ESQ. was elected to the Board of Directors of the Company at its
Annual Meeting of Shareholders in May 1997. Mr. Stoer has been a partner in the
Washington, DC office of the law firm of Bryan Cave LLP since 1990. His practice
is concentrated in the areas


                                       35
<PAGE>   38

of corporate and business law with an international focus. Mr. Stoer has served
on the boards of directors of a number of pharmaceutical testing and consulting
companies, including Boehringer Mannheim Pharmaceuticals.

                    EXECUTIVE OFFICERS OF THE COMPANY
<TABLE>
<CAPTION>

NAME                           AGE          CURRENT POSITION(S) WITH COMPANY
- ----------------------------------------------------------------------
<S>                             <C>         <C>
Kenneth J. McLachlan            51          President, Chief Executive Officer, Chief
                                            Financial Officer and Chief Accounting Officer
David Barnes, MD                52          Managing Director, SDS International, Ltd.
Paul D. Slowey, Ph.D.           42          Chief Operating Officer and Vice President of
                                            Marketing
</TABLE>

      The following are brief summaries of the business experience of the
Executive Officers of the Company. For information on the business background of
Mr. McLachlan, see "-- Directors of the Company."

DAVID BARNES, M.D. had served on the Board of Directors of the Company from
November 1993 until May of 1997. Dr. Barnes has been the Managing Director of
SDS International, Ltd. (UK) ("SDS-UK") since commencement of its operations.
Prior to his position as Managing Director of SDS-UK, Dr. Barnes was Director of
Medical Services for Hemotex Ltd., a laboratory service primarily involved with
the insurance industry in the United Kingdom.

PAUL D. SLOWEY, PH.D. began employment as Director of Sales and Marketing at the
Company in August 1996. In May 1997, Dr. Slowey was promoted to Chief Operating
Officer and Vice President of Sales and Marketing of the Company. From February
1990 until he joined the Company, Dr. Slowey was employed at INCSTAR Corp., a
Minnesota manufacturer of diagnostic products, as International Marketing
Manager and Director of International Sales.

                   EXECUTIVE COMPENSATION AND OTHER MATTERS

SUMMARY OF CASH AND CERTAIN OTHER COMPENSATION

      The following table provides certain summary information for the 1995,
1996 and 1997 fiscal years concerning compensation awarded to, earned by or paid
the Company's Chief Executive Officer and the other executive officer of the
Company whose total annual salary and bonus exceeded $100,000 (collectively, the
"named executive officers") for the fiscal year ended December 31, 1997.


                                       36
<PAGE>   39

<TABLE>
<CAPTION>

                             SUMMARY COMPENSATION TABLE

                                                                                   
                                                                       LONG TERM   
                                                                     COMPENSATION  
                              ANNUAL COMPENSATION (1)                --------------
                          --------------------------------------         AWARDS    
                                                                       SECURITIES
                                                      OTHER            UNDERLYING
                           FISCAL                     ANNUAL             OPTIONS         ALL OTHER
                            YEAR      SALARY       COMPENSATION            (#)          COMPENSATION
                          ------- -------------- ---------------     --------------    -------------
<S>                         <C>     <C>            <C>                 <C>                 <C>
Kenneth J. McLachlan (2)    1997      -            $180,000            1,000,000           -
 President and              1996      -              51,000                -               -
 Chief Executive Officer    1995      -             -                      -               -

David Barnes, MD (3)        1997    $135,000        -                   75,000             -
 Managing Director,         1996     135,000        -                      -               -
 SDS International, Ltd.    1995     131,750        -                   175,000            -
</TABLE>


(1) Amounts shown include compensation earned in each respective fiscal year. No
    bonuses were paid in any of the fiscal years reported.

(2) Includes 1,000,000 options granted to International Business Consultants
    ("IBCO"), a Jersey company of which Mr. McLachlan is a principal, pursuant
    to a Management Consulting Agreement entered into as of December 5, 1997
    between IBCO and the Company under which IBCO provides Mr. McLachlan's
    services to the Company. See "Certain Relationships and Related
    Transactions." Amounts paid in 1996 included payments to Mr. McLachlan
    pursuant to a consulting contract which commenced in June 1996 and which was
    superseded by the Agreement with IBCO. Mr. McLachlan has served as the
    Company's Chief Financial Officer since June 1996 and was appointed
    President and Chief Executive Officer by the Board of Directors in December
    1996.

(3) Includes options to purchase 175,000 shares of Common Stock granted to Mr.
    Barnes in 1995 subject to shareholder approval of an increase in the
    Company's authorized number of common shares; such approval was obtained on
    February 20, 1997.

      In August 1994, the Company entered into an employment agreement with Dr.
David Barnes for the position of Managing Director of SDS International, Ltd.
(UK). The employment agreement provides for an annual base salary of 79,200
(pound) (approximately US $135,000.00) plus the use of a car. If the agreement
is terminated for any reason, Dr. Barnes is entitled to receive his base salary
for the remaining term of the agreement through August 1998.


                                       37
<PAGE>   40

OPTIONS GRANTED IN LAST FISCAL YEAR

      The following table sets forth, for each of the named executive officers,
information concerning options granted during the fiscal year ended December 31,
1997.

<TABLE>
<CAPTION>


                                       INDIVIDUAL GRANTS                  
                        ------------------------------------------------- POTENTIAL REALIZABLE
                                                                            VALUE AT ASSUMED
                                      PERCENT OF                         ANNUAL RATES OF STOCK
                                    TOTAL OPTIONS                                PRICE
                                      GRANTED TO   EXERCISE                APPRECIATION FOR
                          OPTIONS     EMPLOYEES     PRICE   EXPIRATION      OPTION TERM (2)
            NAME        GRANTED(1)     IN 1997      ($/SH)     DATE           5%         10%
            ----        ----------     -------      ------     ----         -----      -----
<S>                     <C>              <C>      <C>        <C>           <C>        <C>
Kenneth J. McLachlan    1,000,000 (3)    57%      $0.406     12-05-07      $661,300   $1,053,100

David Barnes, M.D.         75,000         4%      $0.406     12-05-07        49,600       79,000
</TABLE>

(1) Options were granted at an exercise price equal to the fair market value of
    the Company's Common Stock on date of grant. Options granted were
    exercisable upon grant, and have a ten year term.

(2) The potential realizable value is calculated based on the term of the option
    at time of grant (10 years) and is calculated by assuming that the stock
    price on the date of grant appreciates at the indicated annual rate
    compounded annually for the entire term of the option and that the option is
    exercised and sold on the last day of its term for the appreciated price.
    Actual gains, if any, on stock option exercises are dependent on the future
    performance of the Common Stock and overall stock market conditions.

(3) Options were granted to International Business Consultants, a Jersey
    company, of which Mr. McLachlan is a principal. See "-- Certain
    Relationships and Related Transactions."

OPTION EXERCISE AND HOLDINGS

      The following table provides certain information concerning the value of
unexercised options held as of the end of the fiscal year with respect to the
named executive officers. There were no options exercised by the named executive
officers in the last fiscal year. All options held by the named executive
officers are currently exercisable.


                                       38
<PAGE>   41

                 AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR
                        AND FISCAL YEAR-END OPTION VALUES

<TABLE>
<CAPTION>

                                                                                
                                                   NUMBER OF                    
                                                   SECURITIES        VALUE OF   
                                                   UNDERLYING      UNEXERCISED  
                            SHARES                UNEXERCISED      IN-THE-MONEY 
                           ACQUIRED                 OPTIONS          OPTIONS    
                              ON        VALUE      AT FY-END        AT FY-END   
                           EXERCISE    REALIZED    EXERCISABLE/     EXERCISABLE/
          NAME                (#)        ($)     UNEXERCISABLE    UNEXERCISABLE
- ------------------------- ----------- --------- ---------------- ----------------
<S>                           <C>        <C>      <C>                 <C>
Kenneth J. McLachlan          -          -        1,000,000  /  0     -  /  -

David Barnes, MD              -          -          358,000  /  0     -  /  -

</TABLE>


CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

      In December 1997, the Company entered into a Management Consulting
Agreement (the "Agreement") with International Business Consultants ("IBCO"),
under which IBCO agreed to provide the services of Kenneth J. McLachlan as the
Company's President and Chief Executive Officer from December 5, 1997 until
December 31, 1998, with an automatic one year extension on January 1, 1999 and
each year thereafter unless written notice is given by either the Company or
IBCO 90 days prior thereto. Under the Agreement, IBCO will provide the services
of Kenneth J. McLachlan as President and Chief Executive Officer of the Company
in exchange for a base salary of $180,000 per annum or such greater amount as
the Board of Directors of the Company may from time to time determine. Upon
entering into the Agreement, IBCO was granted options to purchase 250,000 shares
of the Company's Common Stock at $0.406 per share. IBCO was also granted options
to purchase 750,000 shares of the Company's Common Stock at $0.406 per share as
compensation for Mr. McLachlan's previous service to the Company. See "--
Summary of Cash and Certain Other Compensation." Additionally, under the
Agreement, IBCO is entitled to an annual incentive bonus of 10% of the annual
net income of the Company, during the term which IBCO renders services to the
Company under the Agreement, payable, at the option of the Company, in cash or
Common Stock of the Company. IBCO may be terminated for "cause" or "good
reason", as defined in the Agreement.

      In January 1997, subsequent to his resignation as President and CEO of the
Company in December 1996, Ronald Lealos filed a lawsuit against the Company in
Superior Court in Clark County in the State of Washington. The complaint in the
lawsuit alleged various breach of contract claims. This lawsuit was dismissed
without prejudice as a prerequisite to a settlement agreement between Mr. Lealos
and the Company. The parties did not reach a settlement and, in February 1998,
Mr. Lealos filed a complaint against the


                                       39
<PAGE>   42

Company in the same court which alleged substantially the same claims. In March
1998, the Company filed an answer to the complaint and asserted numerous
counterclaims against Mr. Lealos (the "Counterclaim"), including counterclaims
for breach of fiduciary duty and conversion.

      In 1992, the Company loaned to Mr. Lealos, then President and Director of
the Company, $93,000 to purchase shares of the Company's Common Stock. The loan
accrues interest at 6% annually. In 1995, the sum of $9,175 was paid toward the
principal of the loan, leaving a remaining principal balance of $83,825 due
December 31, 1996. The loan is among the subjects of the Company's Counterclaim.

      In June and August 1997, the Company sold shares of its Common Stock in a
private placement pursuant to Regulation D, promulgated under the Securities Act
of 1933. Pursuant to common stock subscription agreements between the Company
and the investors named therein, the Company sold a total of 4,082,905 shares of
Common Stock for an aggregate purchase price of $2,063,000, net of issuance
costs. Bermuda Trust Company, trustee for the Morar Trust, of which the children
of Kenneth J. McLachlan are beneficiaries, was an investor in the private
placement and purchased 200,000 shares for an aggregate purchase price of
$100,000.

      Eric F. Stoer, a director of the Company, is a partner in the law firm of
Bryan Cave LLP, which has provided legal services to the Company.

         SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

      The following table sets forth certain information regarding the
beneficial ownership of Common Stock of the Company as of May 18, 1998 as to (i)
each person who is known by the Company to own beneficially more than 5% of the
outstanding shares of Common Stock, (ii) each director or nominee for director
of the Company, (iii) each of the executive officers named in the Summary
Compensation Table herein and (iv) all directors and executive officers as a
group. Except as otherwise noted, the Company believes the persons listed below
have sole investment and voting power with respect to the Common Stock owned by
them.


                                       40
<PAGE>   43
<TABLE>
<CAPTION>

                                                               COMMON STOCK
- --------------------------------------------        -----------------------------------
                                                       NUMBER OF
                                                        SHARES         % SHARES
    NAME AND ADDRESS                                 BENEFICIALLY    BENEFICIALLY
                                                       OWNED (1)         OWNED
- --------------------------------------------        -----------------------------------
    <S>                                              <C>                 <C>
    Kenneth J. McLachlan (2)
     607 Collingwood House  
     Dolphin Square         
     London SW1 3NF England                           1,700,000 (2)      5.0%

    Hans R. Vauthier
     Steinengraben 28
     Ch-4051
     Basel, Switzerland                                 250,000 (3)        *

    Eric F. Stoer, Esq.
     c/o Bryan Cave LLP
     700 Thirteenth Street
     Washington, DC  20005                              250,000 (4)        *

    David Barnes, M.D.
     c/o SDS International Ltd. (UK)
     11 Sovereign Close
     Sovereign Court
     London, England E1 9HW, UK                         358,000 (5)      1.0%

    Biscount Overseas Limited
     c/o International Securities Corp.
     310 Madison Avenue, Suite 501
     New York, NY  10017                             14,787,567 (6)      32.4%

    All Executive Officers and Directors
    as a group (five persons)                         2,635,800 (7)      7.0%
</TABLE>

- ------------------------
*     Less than one percent.

(1) Beneficial ownership is determined in accordance with the rules of the
    Securities and Exchange Commission, and includes voting power and investment
    power with respect to shares. Shares issuable upon the exercise of
    outstanding stock options that are currently exercisable or become
    exercisable within 60 days from May 18, 1998 are considered outstanding for
    the purpose of calculating the percentage of Common Stock


                                       41
<PAGE>   44

owned by such person but not for the purpose of calculating the percentage of
Common Stock owned by any other person.

(2) Includes 200,000 shares registered in the name of Bank of Bermuda Trust
    Company, trustee for the Morar Trust, an irrevocable trust established for
    the benefit of Mr. McLachlan's children. Also includes 500,000 shares
    registered in the name of Reads Trust Company Limited, trustee of an
    irrevocable trust established for the benefit of Mr. McLachlan's children.
    Mr. McLachlan has no power to vote or dispose of these shares pursuant to
    the terms of the trusts. Also includes options to purchase 1,000,000 shares
    of Common Stock which were granted to International Business Consultants, a
    Jersey company, of which Mr. McLachlan is a principal.

(3) Includes options to purchase 250,000 shares of Common Stock.

(4) Includes options to purchase 250,000 shares of Common Stock.

(5) Includes options to purchase 358,000 shares of Common Stock.

(6) Includes an estimated 6,000,000 shares of Common Stock issuable upon
    conversion of the 1998-A Convertible Preferred Stock (based on the
    assumption of conversion at the market price of the Company's Common Stock
    on the date of this Prospectus). Also includes an estimated 6,500,000 shares
    of Common Stock issuable upon the exercise of an option to purchase
    $1,500,000 of an additional series of convertible preferred stock upon
    substantially the same terms and conditions as the purchase of the 1998-A
    Preferred Stock (based on the assumption of conversion at the market price
    of the Company's Common Stock on the date of this Prospectus).

(7) Includes Kenneth J. McLachlan, Eric F. Stoer, Hans R. Vauthier, David Barnes
    and Paul D. Slowey, the current directors and executive officers of the
    Company. Includes options to purchase an aggregate of 1,933,000 shares of
    Common Stock.

                              SELLING SHAREHOLDERS

      None of the Selling Shareholders is an affiliate of the Company or has had
any position, office or other material relationship with the Company within the
past three years except as a shareholder of the Company or as noted below. The
following table sets forth information with respect to the Selling Shareholders,
based upon information provided to the Company by them.


                                       42
<PAGE>   45
<TABLE>
<CAPTION>

                                Shares Beneficially
                                     Owned Prior to           Shares Being          Shares Beneficially
Name of Selling Shareholder                Offering                Offered     Owned After Offering (1)
- -------------------------------------------------------------------------------------------------------
<S>                                       <C>                    <C>                           <C>
Mark Alt                                    100,000                100,000                           0
Sterling E. Baker                           122,500                100,000                      22,500
Linda Bidell                                200,000                200,000                           0
Collin Bingham Trust                         50,000                 50,000                           0
Tanner Payne Boyer Trust                     50,000                 50,000                           0
Brian Brammell                              187,000                145,000  (2)                 42,000
E. Paul Brodsky, CPA, IRA                    25,000                 25,000                           0
Mary L. Brodsky, IRA                         25,000                 25,000                           0
Carol Bruckner                               76,000                 75,000                       1,000
Center for Aids Research and
 Training, Inc.                             100,000                100,000                           0
The Covette Community
Property Trust                              100,000                100,000                           0
David Fitzpatrick                            50,000                 50,000                           0
David Freund                              2,285,714              2,285,714  (3)                      0
Gerald Grayson  (4)                         200,000                200,000                           0
Grayson & Associates, Inc. (5)              194,632                194,632  (6)                      0
Dean Greenberg                               50,000                 50,000                           0
Harvey Katzman                              127,250                100,000                      27,250
Hollywood Pins Co. Pension Plan             270,000                200,000                      70,000
Alan Lerner                                  20,000                 20,000                           0
Michael Lipkin                              100,000                100,000                           0
Sandy Linka                                  30,000                 30,000                           0
Gary Nathanson                              233,000                100,000                     133,000
Lisa Neuhof                                  25,000                 25,000                           0
Jack P. Slovak                               62,000  (7)            50,000                      12,000
Robert A. Slovak                             60,000                 50,000                      10,000
Stanton Law Corporation
 Profit Sharing Plan                         50,000                 50,000                           0
George L. Stanton                           130,000                100,000                      30,000
The Tail Wind Fund Ltd.                   2,151,277              2,151,277  (8)                      0
Linda Trester                                20,000                 20,000                           0
WCGMG, Inc., DBPP                           100,000                100,000                           0
Jacob Zamstein, MD                           65,000                 50,000                      15,000

Total                                     7,259,373              6,896,623                     362,750
=====                                     =========              =========                     =======
</TABLE>

(1) Assumes all shares offered hereby are sold to persons who are not affiliates
    of the Selling Shareholders. The Selling Shareholders may, but are not
    required to, sell all shares offered hereby.

(2) Includes 45,000 shares which were issued in November 1996 upon the exercise
    of certain warrants acquired by Mr. Brammel.

(3) Includes 1,035,714 shares which have been issued upon the exercise of
    certain reset rights under the terms of the Subscription Agreement dated as
    of August 22, 1997 by and between the Company and David Freund.

(4) Mr. Grayson is a principal of Grayson & Associates, Inc., which was engaged
    by the Company to provide certain capital raising services through September
    1997.

(5) In March 1997, Grayson & Associates, Inc. received a cash fee and warrants
    from the Company as compensation for assisting the Company with a private
    placement of debentures. Grayson & Associates, Inc. also received a cash fee
    and the Grayson Warrants in connection with the private placement of certain
    of the Shares.


                                       43
<PAGE>   46

(6)   Includes 194,632 shares which may be issued upon exercise of the Grayson
      Warrants.

(7)   Includes 12,000 shares registered in the name of Slovak Family Trust.

(8)   Includes 100,000 shares which may be issued upon exercise of the Tail Wind
      Warrants. Also includes 141,742 shares which will be issued in accordance
      with the terms of the Tail Wind Subscription Agreement.

      Of the Shares offered hereby, 2,632,905 were issued in July 1997 to Tail
Wind and the Investors and 1,250,000 were issued in August 1997 to David Freund
in a private placement pursuant to Regulation D of the Securities Act; 1,035,714
were issued in December 1997 to David Freund upon the exercise of certain reset
rights under the terms of the Common Stock Subscription Agreement dated as of
August 22, 1997 by and between Mr. Freund and the Company; 1,496,630 were issued
to Tail Wind in April 1998 upon the exercise of certain reset rights under the
terms of the Common Stock Subscription Agreement dated as of June 30, 1997 by
and between Tail Wind and the Company (the "Tail Wind Subscription Agreement");
141,742 will be issued to Tail Wind as additional reset shares in accordance
with the terms of the Tail Wind Subscription Agreement; 100,000 are issuable
upon the exercise of the Tail Wind Warrants; 194,632 are issuable upon the
exercise of the Grayson Warrants and 45,000 were issued upon the exercise of
warrants acquired by Brian Brammel in a private placement conducted by the
Company pursuant to Regulation D in November 1995. The Grayson Warrants were
issued as compensation in connection with the private placement of the Shares
sold to the Investors and Tail Wind. The Grayson Warrants may be exercised at
any time on or prior to June 30, 2002, 161,600 at an exercise price of $.50 per
share and 33,032 at an exercise price of $.72656 per share. The Tail Wind
Warrants were issued in connection with the private placement, and may be
exercised at any time from January 1, 1998 to January 1, 2003 for an exercise
price of $1.00 per share. Additional shares that may become issuable as a result
of the anti-dilution provisions of the Tail Wind Warrants and the Grayson
Warrants are also offered hereby pursuant to Rule 416 under the Securities Act.

                        DESCRIPTION OF SECURITIES

      GENERAL

      The Company's Certificate of Incorporation authorizes the Company to issue
up to 50,000,000 shares of Common Stock, par value $.01 per share, and 1,000,000
shares of Preferred Stock, par value $.01 per share. As of May 18, 1998, there
were approximately 32,378,821 shares of Common Stock outstanding and 1,500
shares of Series 1998-A Convertible Preferred Stock outstanding.

                                       44
<PAGE>   47

      COMMON STOCK

      The holders of Common Stock are entitled to one vote for each share held
of record on all matters to be voted on by stockholders. There is no cumulative
voting with respect to the election of directors, with the result that the
holders of more than 50% of the shares voted for the election of directors can
elect all of the directors. The holders of Common Stock are entitled to receive
dividends when, as and if declared by the Board of Directors out of funds
legally available therefor.

      In the event of liquidation, dissolution or winding up of the Company, the
holders of Common Stock are entitled to share ratably in all assets remaining
available for distribution to them after payment of liabilities and after
provision has been made for each class of stock, including the 1998-A Preferred
Stock (defined below), having preference over the Common Stock. Holders of
shares of Common Stock, as such, have no conversion, preemptive or other
subscription rights, and there are no redemption provisions applicable to the
Common Stock. All of the outstanding shares of Common Stock are, and the shares
of Common Stock offered hereby, when issued against the consideration set forth
in this Prospectus, will be, fully paid and nonassessable.

      1998-A PREFERRED STOCK

      In a private placement on January 26, 1998, the Company issued 1,500
shares of its 1998-A Preferred Stock. Pursuant to the terms of the 1998-A
Preferred Stock, the holder has the right, exercisable at one or more times, at
its option, to convert up to (i) twenty-five percent (25%) of the shares of
1998-A Preferred Stock initially issued to the holder at any time from and after
April 26,1998, (ii) fifty percent (50%) of the shares of 1998-A Preferred Stock
from and after May 26, 1998, (iii) seventy-five percent (75%) of the shares of
1998-A Preferred Stock from and after June 25, 1998, and (iv) all of the shares
of 1998-A Preferred Stock from and after July 25, 1998.

      Upon conversion of the 1998-A Preferred Stock, the holder will be entitled
to receive a number of shares of Common Stock determined by dividing the stated
value of the 1998-A Preferred Stock ($1,000 per share), plus a dividend in the
amount of 6% per annum of the stated value from the date of issuance (unless the
Company elects to pay that dividend in cash), by a conversion price equal to the
lesser of $.3375 or 20% of the average closing bid prices for shares of the
Common Stock during the five-day period prior to conversion, subject to
adjustment upon the occurrence of certain dilutive events. However, in no event
will the holder be entitled to receive upon conversion a number of shares of
that would result in the holder beneficially owning more than 4.99% of the
outstanding shares of the Company's Common Stock. As of the date of this
Prospectus, 140 shares of 1998-A Preferred Stock have been converted for a total
of 1,537,567 shares of Common Stock, which includes 22,415 shares representing a
dividend.

      The 1998-A Preferred Stock ranks prior to the Common Stock. In the event
of liquidation, dissolution or winding up of the Company, the holder of the
1998-A Preferred

                                       45
<PAGE>   48

Stock is entitled to share ratably in all assets remaining available for
distribution to them after payment of liabilities, but prior to any distribution
to holders of Common Stock.

      The foregoing summary is qualified in its entirety by the terms of the
Common Stock and the Series 1998-A Convertible Preferred Stock.

                           PLAN OF DISTRIBUTION

      The Selling Shareholders may sell the shares in one or more transactions
(which may involve one or more block transactions) on the over-the-counter
markets on the OTC Bulletin Board and upon terms then prevailing or at prices
related to the then current market price, or in separately negotiated
transactions or in a combination of such transactions. The Common Stock offered
hereby may be sold by one or more of the following methods, without limitation:
(a) a block trade in which a broker or dealer so engaged will attempt to sell
the shares as agent but may position and resell a portion of the block as
principal to facilitate the transaction; (b) purchases by a broker or dealer as
principal and resale by such broker or dealer for its account pursuant to this
Prospectus; (c) ordinary brokerage transactions and transactions in which the
broker solicits purchasers; (d) privately negotiated transactions; (e) short
sales; and (f) face-to-face transactions between sellers and purchasers without
a broker-dealer. The Selling Shareholders may also sell Shares in accordance
with Rule 144 under the Securities Act. The Selling Shareholders may be deemed
to be underwriters of the shares offered hereby within the meaning of the
Securities Act.

      The Company has agreed to keep effective the registration of the Shares
offered hereby for a period of not less than two years, until the date upon
which all of the Shares offered hereby have been sold or until the date on which
the Shares may be sold without registration, whichever is shorter.

      In effecting sales, brokers or dealers engaged by the Selling Shareholders
may arrange for other brokers or dealers to participate. Such broker or dealers
may receive commissions or discounts from the Selling Shareholders in amounts to
be negotiated. All other expenses incurred in connection with this offering will
be borne by the Company other than the Selling Shareholders' legal fees. Such
brokers and dealers and any other participating brokers or dealers may, in
connection with such sales, be deemed to be underwriters within the meaning of
the Securities Act. Any discounts or commissions received by any such brokers or
dealers may be deemed to be underwriting discounts and commissions under the
Securities Act.

      The Company is bearing all of the costs relating to registration of the
Shares, except commissions, discounts or other fees payable to a broker, dealer,
underwriter, agent or market maker in connection with the sale of any of the
Shares and fees of counsel for the Selling Shareholders.

                                       46
<PAGE>   49

                              LEGAL MATTERS

      The validity of the securities being offered will be passed upon for the
Company by Bryan Cave LLP, 700 Thirteenth Street, Washington, DC 20005.

                                 EXPERTS

      The financial statements of the Company for the fiscal year ended December
31, 1997 have been audited by Arthur Andersen LLP, independent certified public
accountants, to the extent and for the periods set forth in their report with
respect thereto, and are included in the Company's Annual Report on Form 10-KSB
for the fiscal year ended December 31, 1997, and are incorporated herein by
reference, in reliance upon such report given upon the authority of said firm as
experts in auditing and accounting. The financial statements of the Company for
the fiscal year ended December 31, 1996 have been audited by Hollander, Gilbert
& Co., independent certified public accountants, to the extent and for the
periods set forth in their report with respect thereto, and are included in the
Company's Annual Report on Form 10-KSB for the fiscal year ended December 31,
1996, and are incorporated herein by reference, in reliance upon such report
given upon the authority of said firm as experts in auditing and accounting.

                          CHANGES IN ACCOUNTANTS

      On May 30, 1997, the Company dismissed its independent accountants,
Hollander, Gilbert & Co. Such dismissal was recommended and approved by the
Company's Board of Directors.

      The audit reports of Hollander, Gilbert & Co. on the Company's
consolidated financial statements as of and for the fiscal years ended December
31, 1996 and 1995 did not contain an adverse opinion or a disclaimer of opinion
nor were they qualified or modified as to uncertainty, audit scope, or
accounting principles except: they were modified as to uncertainty of the
Company to continue as a going concern. During fiscal years 1996 and 1995 and
the subsequent interim period through May 30, 1997, there were no disagreements
with Hollander, Gilbert & Co. on any matter of accounting principles or
practices, financial statement disclosure, or auditing scope or procedure,
which, if not satisfied to Hollander, Gilbert & Co.'s satisfaction, would have
caused it to make reference to the subject matter of the disagreement in
connection with its reports.

      Also on May 30, 1997, the Company engaged Arthur Andersen LLP to be its
independent auditors. The Company did not consult with Arthur Andersen LLP at
any time prior to its engagement regarding the application of accounting
principles to a completed or contemplated specified transaction or the type of
audit opinion that might be rendered on the Company's consolidated financial
statements. Prior to engaging Arthur

                                       47
<PAGE>   50

Andersen LLP, the Company did not receive any written or oral advice from Arthur
Andersen LLP on accounting, auditing, or financial reporting issues. The
engagement was recommended and approved by the Company's Board of Directors and
ratified by the Company's shareholders and the Company's annual meeting of
shareholders held on May 30, 1997.

                INDEMNIFICATION OF DIRECTORS AND OFFICERS

      Section 145 of the Delaware General Corporation Law empowers a corporation
to indemnify its directors and officers and to purchase insurance with respect
to liability arising out of their capacity or status as directors and officers
provided that this provision shall not eliminate or limit the liability of a
director (i) for any breach of the director's duty of loyalty to the Corporation
or its stockholders, (ii) for acts or omissions not in good faith or which
involve intentional misconduct or a knowing violation of law, (iii) arising
under Section 174 of the General Corporation Law of Delaware, or (iv) for any
transaction from which the director derived an improper personal benefit.

      The Delaware Corporation Law provides further that the indemnification
permitted thereunder shall not be deemed exclusive of any other rights to which
the directors and officers may be entitled under the corporation's by-laws, any
agreement, vote of shareholders or otherwise.

      Article Ten of the Company's Certificate of Incorporation eliminates the
personal liability of directors to the fullest extent permitted by Section 145
of the Delaware Corporation Law.

      The effect of the foregoing is to require the Company to indemnify the
officers and directors of the Company for any claim arising against such persons
in their official capacities if such person acted in good faith and in a manner
that he reasonably believed to be in or not opposed to the best interests of the
corporation, and, with respect to any criminal action or proceeding, had no
reasonable cause to believe his conduct was unlawful.

      INSOFAR AS INDEMNIFICATION FOR LIABILITIES ARISING UNDER THE SECURITIES
ACT OF 1933 MAY BE PERMITTED TO DIRECTORS, OFFICERS OR PERSONS CONTROLLING THE
COMPANY PURSUANT TO THE FOREGOING PROVISIONS, THE COMPANY HAS BEEN INFORMED THAT
IN THE OPINION OF THE SECURITIES AND EXCHANGE COMMISSION, SUCH INDEMNIFICATION
IS AGAINST PUBLIC POLICY AS EXPRESSED IN THE ACT AND IS THEREFORE UNENFORCEABLE.

                                       48
<PAGE>   51

                          ADDITIONAL INFORMATION

      The Company has filed with the Securities and Exchange Commission (the
"Commission"), Washington, D.C., a Registration Statement on Form SB-2 (the
"Registration Statement") under the Securities Act with respect to the Common
Stock offered by this Prospectus. This Prospectus, filed as part of such
Registration Statement, does not contain all of the information set forth in, or
annexed as exhibits to, the Registration Statement, certain parts of which are
omitted in accordance with the rules and regulations of the Commission. For
further information with respect to the Company and this offering, reference is
made to the Registration Statement, including the exhibits filed therewith,
which may be inspected without charge at the Office of the Commission, 450 Fifth
Street, NW, Washington, DC, 20549. Copies of the Registration Statement may
obtained from the Commission at its principal office upon payment of prescribed
fees. Statements contained in this Prospectus as to the contents of any contract
or other document are not necessarily complete and, where the contract or other
document has been filed as an exhibit to the Registration Statement, each
statement is qualified in all respects by reference to the applicable document
filed with the Commission.


                                       49
<PAGE>   52

                             FINANCIAL STATEMENTS

      The Consolidated Financial Statements, together with the report thereon of
Arthur Andersen LLP and Hollander, Gilbert & Co. are included in this report as
follows:

<TABLE>
      <S>                                                                     <C>
      Report of Arthur Andersen LLP                                            F-2

      Report of Hollander, Gilbert & Co.                                       F-3

      Consolidated Balance Sheets as of December 31, 1997 and 1996             F-4

      Consolidated Statements of Operations -                                  F-5
         For the Years Ended December 31, 1997 and 1996

      Consolidated Statement of Stockholders' Equity -                         F-6
         For the Years Ended December 31, 1997 and 1996

      Consolidated Statements of Cash Flows -                                  F-7
         For the Years Ended December 31, 1997 and 1996

      Notes to Consolidated Financial Statements                               F-8

      Consolidated Balance Sheets as of March 31, 1998                        F-23
         and December 31, 1997 (Unaudited)

      Consolidated Statements of Operations -                                 F-24
         Three Months Ended March 31, 1998 and 1997 (Unaudited)

      Consolidated Statements of Cash Flows -                                 F-25
         Three Months Ended March 31, 1998 and 1997 (Unaudited)

      Notes to Consolidated Financial Statements                              F-26
</TABLE>


                                       F-1
<PAGE>   53

                   Report of Independent Public Accountants

To the Board of Directors and Shareholders of
Saliva Diagnostic Systems, Inc.:

We have audited the accompanying consolidated balance sheet of Saliva Diagnostic
Systems, Inc. (an Oregon Corporation) as of December 31, 1997, and the related
consolidated statement of operations, stockholders' equity and cash flows for
the year ended December 31, 1997. 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 audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present
fairly, in all material respects, the financial position of Saliva Diagnostic
Systems, Inc. as of December 31, 1997, and the results of its operations and its
cash flows for the year then ended in conformity with generally accepted
accounting principles.

The accompanying consolidated financial statements have been prepared assuming
that the Company will continue as a going concern. As discussed in Note 2 to the
consolidated financial statements, the Company has suffered recurring losses
from operations and has a net capital deficiency that raises substantial doubt
about its ability to continue as a going concern. Management's plans in regard
to these matters are also described in Note 2. The consolidated financial
statements do not include any adjustments that might result from the outcome of
this uncertainty.

                                                Arthur Andersen LLP

Portland, Oregon,
March 23, 1998


                                       F-2
<PAGE>   54


                   Report of Independent Public Accountants

To the Board of Directors and Stockholders
Saliva Diagnostic Systems, Inc.:

We have audited the accompanying consolidated balance sheet of Saliva Diagnostic
Systems, Inc. and subsidiaries as of December 31, 1996, and the related
consolidated statement of operations, stockholders' equity and cash flows for
the year then ended. These financial statements are the responsibility of the
Company's management. Our responsibility is to express an opinion on these
financial statements based on our audit.

We conducted our audit in accordance 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
misstatements. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present
fairly, in all material respects, the financial position of Saliva Diagnostic
Systems, Inc. and subsidiaries as of December 31, 1996 and the results of
operations, stockholders' equity and cash flows for the year then ended, in
conformity with generally accepted accounting principles.

The accompanying financial statements have been prepared assuming that the
Company will continue as a going concern. As discussed in Note 2 to the
financial statements, the Company's significant operating losses and significant
capital requirements raise substantial doubt about the Company's ability to
continue as a going concern. The financial statements do not include any
adjustments that might result from the outcome of these uncertainties.



                                                Hollander, Gilbert & Co.

Los Angeles, California
March 21, 1997


                                       F-3

<PAGE>   55


                SALIVA DIAGNOSTIC SYSTEMS, INC. AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEETS
<TABLE>
<CAPTION>

                                                                                December 31,
                                                                    --------------------------------------
                                                                         1997                   1996
                                                                    ---------------        ---------------
<S>                                                           <C>                     <C>
ASSETS
Current assets:
 Cash and cash equivalents                                    $         271,312       $        776,380
 Accounts receivable, less allowance of $42,000(1997)
  and $0 (1996)                                                         154,052                178,436
 Inventories                                                            458,177                268,431
 Prepaid expenses                                                        51,876                 34,425
                                                                    ---------------         --------------
   Total current assets                                                 935,417              1,257,672

 Property and equipment, less accumulated
   depreciation of $995,853(1997) and $792,309(1996)                    434,457                493,649
 Deposits                                                                40,162                188,647
 Restricted cash                                                        120,500                120,500
 Patents and trademarks, less accumulated
   amortization of $48,375 (1997) and $39,183 (1996)                    108,541                117,733
                                                                    ===============         ==============
                                                              $       1,639,077       $      2,178,201
                                                                    ===============         ==============

LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
 Accounts payable                                             $         670,400       $        277,292
 Accrued expenses                                                     1,473,944                540,781
 Accrued interest payable                                                68,240                 68,240
 Current portion of long-term debt and
  obligations under capital leases                                       33,779                 35,057
                                                                    ---------------         --------------
   Total current liabilities                                          2,246,363                921,370
Long-term debt and obligations under capital
 leases, net of current portion                                          59,401                 96,199
                                                                    ---------------         --------------
   Total liabilities                                                  2,305,764              1,017,569

Commitments and contingencies (Note 13)

Shareholders' equity:
 Preferred stock, no par value, 1,000,000 shares
  authorized (1997), none issued and outstanding                              -                      -
 Common stock, $.01 par value, 50,000,000
  shares authorized (1997), 25,000,000 shares
  authorized (1996), issued and outstanding:
  29,344,624 (1997) and 22,090,785 (1996)                               293,447                220,908
 Additional paid-in capital                                          27,701,417             22,998,052
 Note receivable from shareholder for stock                             (83,825)               (83,825)
 Currency translation adjustment                                        (51,268)               (60,257)
 Accumulated deficit                                                (28,526,458)           (21,914,246)
                                                                    ---------------         --------------
  Total stockholders' equity                                           (666,687)             1,160,632
                                                                    ===============         ==============
                                                              $       1,639,077       $      2,178,201
                                                                    ===============         ==============
</TABLE>


      The accompanying notes are an integral part of these balance sheets.


                                       F-4
<PAGE>   56




                SALIVA DIAGNOSTIC SYSTEMS, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>

                                                                         Years Ended December 31,
                                                                   --------------------------------------
                                                                         1997                 1996
                                                                   -----------------    -----------------
<S>                                                             <C>                   <C>
Revenues:
 Product sales                                                  $      1,422,296      $       715,780
 Technology licensing income                                              -                    24,870
                                                                   --------------        -------------
  Total revenues
                                                                       1,422,296              740,650

Costs and expenses:
 Cost of products sold                                                 1,426,638              894,841
 Research and development expense                                        665,475              617,358
 Selling, general and administrative
  expense                                                              5,270,955            3,911,587
Write-off of goodwill                                                          -              540,000
Restructuring expense                                                    278,537                    -
                                                                   --------------        -------------
 Loss from operations                                                 (6,219,309)          (5,223,136)


Interest income                                                           28,850               99,418
Interest expense                                                        (413,993)             (28,681)
Other expense                                                             (7,760)                   -
                                                                   --------------
 Net loss                                                       $     (6,612,212)     $    (5,152,399)
                                                                   ==============        =============

Basic and diluted net loss per share                            $          (0.27)     $         (0.26)
                                                                   ==============        =============
Shares used in basic and diluted per share calculations               24,894,900           20,100,000
                                                                   ==============        =============
</TABLE>




















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


                                       F-5
<PAGE>   57




                SALIVA DIAGNOSTIC SYSTEMS, INC. AND SUBSIDIARIES
                 CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

<TABLE>
<CAPTION>

                                                           Additional                      Currency
                                     Common Stock            Paid-in          Note       Translation    Accumulated
                                Shares        Amount         Capital       Receivable     Adjustment      Deficit          Total
                              ------------------------------------------------------------------------------------------------------
<S>                              <C>           <C>            <C>              <C>         <C>         <C>              <C>
Balances, December 31, 1995      13,176,366    $ 131,764      $ 17,726,078     $ (83,825)  $ (34,859)  $ (16,761,847)   $   977,311

Exercise of warrants              2,580,861       25,807         2,444,711                                                2,470,518
Exercise of stock options           104,750        1,048            75,802                                                   76,850
Issuance of shares in
 settlement agreement                16,500          166            53,584                                                   53,750
Convertible debentures payable
 converted into common stock      6,212,308       62,123         2,697,877                                                2,760,000
Currency translation
 adjustment                                                                                  (25,398)                       (25,398)
Net loss                                                                                                  (5,152,399)    (5,152,399)
                               -----------------------------------------------------------------------------------------------------
Balances, December 31, 1996      22,090,785      220,908        22,998,052       (83,825)    (60,257)    (21,914,246)     1,160,632
Beneficial conversion
 feature related to
 Convertible Debentures
 issued March 1997                                                 375,000                                                  375,000
Conversion of Debentures
 into common stock                1,736,824       17,368         1,482,632                                                1,500,000
Write-off of unamortized
 financing costs                                                   (99,800)                                                 (99,800)
Issuance of common stock
 pursuant to Debenture
 and private placement
 conversion reset provisions      1,399,356       13,994           (13,994)                                                       -
Issuance of common stock
 in payment of interest
 on Debentures                       27,604          276            29,119                                                   29,395
Sale of common stock in
 private placements               4,082,905       40,829         2,022,585                                                2,063,414
Exercise of stock options             7,150           72               386                                                      458
Compensation expense on
 issuance of stock options                                         907,437                                                  907,437
Currency translation adjustment                                                                8,989                          8,989
Net loss                                                                                                  (6,612,212)    (6,612,212)
                                ----------------------------------------------------------------------------------------------------
Balances, December 31, 1997      29,344,624      293,447      $ 27,701,417     $ (83,825)  $ (51,268)  $ (28,526,458)   $  (666,687)
                                ====================================================================================================
</TABLE>

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

                                       F-6
<PAGE>   58


                SALIVA DIAGNOSTIC SYSTEMS, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>


                                                                             Year Ended December 31,
                                                                     ----------------------------------------
                                                                           1997                   1996
                                                                     ----------------       -----------------
<S>                                                                  <C>                     <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss                                                             $    (6,612,212)        $    (5,152,399)
Adjustments to reconcile net loss to net cash                                            
 provided by (used in) operating activities:                                             
  Depreciation and amortization                                              225,606                 290,929
  Compensation expense on issuance of stock options                          907,437                       -
  Net loss on disposal of assets                                              25,900                       -
  Shares issued in lieu of fees and expenses                                       -                  53,750
  Interest expense related to conversion of Debentures                       404,395     
  Write-off of goodwill                                                            -                 540,000
  Currency translation adjustment                                              8,989                 (25,398)
Changes in current assets and liabilities:                                               
 Accounts receivable                                                          24,384                (135,145)
 Inventories                                                                (189,746)                 31,730
 Prepaid expenses and deposits                                               (17,451)                 (5,469)
 Accounts payable and accrued expenses                                     1,326,271                 336,532
                                                                         -------------           -------------
  Net cash used in operating activities                                   (3,896,427)             (4,065,470)
CASH FLOWS FROM INVESTING ACTIVITIES:                                                    
 Placement of restricted cash                                                      -                (120,500)
 Acquisitions of property and equipment                                      (62,770)               (214,418)
 Deposits                                                                     48,332                (118,628)
 Other assets                                                                      -                     124
                                                                         -------------           -------------
  Net cash used in investing activities                                      (14,438)               (453,422)
CASH FLOWS FROM FINANCING ACTIVITIES:                                                    
 Proceeds from issuance of Common Stock, net of                                          
   issuance costs                                                          2,063,414                       -
 Proceeds from convertible debentures, net of                                            
   issuance costs                                                          1,380,000                       -
 Principal payment of convertible debentures                                       -                 (25,000)
 Notes payable and interim financing, net                                          -                 109,476
 Repayment of long term debt and capital lease obligations                   (38,075)                (24,586)
 Exercise of Common Stock options and warrants                                   458               2,547,368
                                                                         -------------           -------------
  Net cash provided by financing activities                                3,405,797               2,607,258
                                                                         -------------           -------------
                                                                                         
  Net increase (decrease) in cash and cash equivalents                      (505,068)             (1,911,634)
    Cash and cash equivalents, beginning of period                           776,380               2,688,014
                                                                         =============           =============
    Cash and cash equivalents, end of period                         $       271,312         $       776,380
                                                                         =============           =============
                                                                                         
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:                                        
  Cash paid for interest                                             $         7,800         $        10,144
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION:                                         
  Conversion of deposit to property and equipment                    $       100,153         $             -
  Shares issued in lieu of fees and expenses                                       -                  53,750
  Conversion of Debentures into Common Stock                               1,380,000                       -
</TABLE>


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


                                       F-7
<PAGE>   59


                SALIVA DIAGNOSTIC SYSTEMS, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           DECEMBER 31, 1997 AND 1996

1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

DESCRIPTION OF BUSINESS

Saliva Diagnostic Systems, Inc. (the "Company") develops rapid immunoassays
utilizing immunochromatography for the detection of antibodies to selected
pathogens, such as the HIV, the virus that causes AIDS, and Helicobacter pylori,
a bacteria linked to peptic ulcers and gastric cancer. In addition, the Company
develops proprietary specimen collection devices and other diagnostic devices.

PRINCIPLES OF CONSOLIDATION

The consolidated financial statements include the accounts of the Company and
its wholly-owned subsidiaries, SDS International, Ltd. and Saliva Diagnostic
Systems (Asia) Ltd. All significant intercompany accounts and transactions have
been eliminated.

CASH AND CASH EQUIVALENTS

Cash and cash equivalents consists of cash and short-term highly liquid
investments purchased with original or remaining maturities of three months or
less.

INVENTORIES

Inventories are stated at the lower of cost or market determined on a first-in,
first-out (FIFO) basis.

PROPERTY AND EQUIPMENT

Property and equipment is stated at cost. Depreciation is computed on the
straight-line method based upon the estimated useful life of the assets.
Leasehold improvements are amortized over the life of the related lease.
Useful lives are generally as follows:

<TABLE>
      <S>                               <C>
      Office furniture and equipment    five to seven years
      Machinery and equipment           seven years
      Exhibits                          seven years
      Vehicles                          five years
</TABLE>

PATENTS AND TRADEMARKS

The costs of patents and trademarks are being amortized on the straight line
method over 17 years.

REVENUE RECOGNITION

Revenue is recognized when products are shipped to customers.

                                      F-8
<PAGE>   60

PRODUCT LIABILITY

The Company has not established any allowance for product liability at present
because of the limited distribution of its product and limited history which
reflect no instance of problems with product liability.

RESEARCH AND DEVELOPMENT

Research and development expenditures include those costs associated with the
Company's on-going research and development activities. All research and
development costs are expensed as incurred.

INCOME TAXES

The Company is in a net deferred tax asset position and has generated net
operating losses to date. Accordingly, no provision for or benefit from income
taxes has been recorded in the accompanying statements of operations. The
Company will continue to provide a valuation allowance for its deferred tax
assets until it becomes more likely than not, in management's assessment, that
the Company's deferred tax assets will be realized.

CURRENCY TRANSLATION

The local currency is the functional currency in the Company's foreign
subsidiaries. Assets and liabilities of the foreign subsidiaries are translated
to U.S. dollars at current rates of exchange, and revenues and expenses are
translated using weighted average rates during the year. Foreign currency
translation adjustments are included as a separate component of shareholders'
equity. Foreign currency transaction gains and losses are included as a
component of other income and expense, in the consolidated statements of
operations.

LOSS PER SHARE

In February 1997, the Financial Accounting Standards Board (FASB) issued
Statement of Financial Accounting Standards No. 128, "Earnings per Share" (SFAS
128). SFAS 128 changes the standards for computing and presenting earnings per
share (EPS) and supersedes Accounting Principles Board Opinion No. 15, "Earnings
per Share." SFAS 128 simplifies the standards for computing earnings per share
and makes them comparable to international EPS standards. It replaces the
presentation of primary EPS with a presentation of basic EPS. It also requires
dual presentation of basic and diluted EPS on the face of the income statement
for all entities with complex capital structures and requires a reconciliation
of the numerator and denominator of the basic EPS computation to the numerator
and denominator of the diluted EPS computation. SFAS 128 is effective for
financial statements issued for periods ending after December 15, 1997,
including interim periods. This Statement requires restatement of all
prior-period EPS data presented.

As it relates to the Company, the principal differences between the provisions
of SFAS 128 and previous authoritative pronouncements are the exclusion of
common stock equivalents in the determination of Basic Earnings Per Share and
the market price at which common stock equivalents are calculated in the
determination of Diluted Earnings Per Share.

                                      F-9
<PAGE>   61

Basic earnings per common share is computed using the weighted average number of
shares of common stock outstanding for the period. Diluted earnings per common
share is computed using the weighted average number of shares of common stock
and dilutive common equivalent shares related to stock options and warrants
outstanding during the period.

The adoption of SFAS 128 had no effect on previously reported loss per share
amounts for the year ended December 31, 1996. For the years ended December 31,
1997 and 1996, primary loss per share was the same as basic loss per share and
fully diluted loss per share was the same as diluted loss per share. A net loss
was reported in 1997 and 1996, and accordingly, in those years the denominator
was equal to the weighted average outstanding shares with no consideration for
outstanding options and warrants to purchase shares of the Company's common
stock, because to do so would have been anti-dilutive. Stock options for the
purchase of 3,153,500 and 1,815,250 shares at December 31, 1997 and 1996,
respectively, and warrants for the purchase of 1,947,216 and 1,530,000 shares at
December 31, 1997 and 1996, respectively, were not included in loss per share
calculations, because to do so would have been anti-dilutive.

FAIR VALUE OF FINANCIAL INSTRUMENTS

The carrying amounts of cash and cash equivalents, accounts receivable and
accounts payable approximate fair value because of the short-term nature of
these instruments. Fair value estimates are made at a specific point in time,
based on relevant market information about the financial instrument when
available. These estimates are subjective in nature and involve uncertainties
and matters of significant judgment and therefore, cannot be determined with
precision. Changes in assumptions could significantly affect the estimates.

CONCENTRATION OF CREDIT RISK

Financial instruments which subject the Company to concentrations of credit risk
consist primarily of trade receivables from large domestic and foreign
companies. Sales to one customer accounted for approximately 17% of total
product sales in 1997. Sales to three customers, accounted for approximately
20%, 18%, and 11% respectively, of total product sales in 1996. At December 31,
1997 accounts receivable from two customers comprised 32% and 27%, respectively
of total net accounts receivable. The Company's foreign sales in 1997 and 1996
were 41% and 55% of total sales, respectively.

USE OF ESTIMATES

The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect certain reported amounts and disclosures. Actual results could differ
from those estimates.

RECLASSIFICATIONS

Certain 1996 balances have been reclassified to conform with the current year's
presentation.

EFFECT OF RECENT ACCOUNTING PRONOUNCEMENTS

                                      F-10
<PAGE>   62

In June 1997, the FASB issued Statement of Financial Accounting Standards No.
130, "Reporting Comprehensive Income" (SFAS 130), which establishes requirements
for disclosure of comprehensive income and is effective for the Company's fiscal
year ending December 31, 1998. Reclassification of earlier financial statements
for comparative purposes is required. The Company believes the implementation of
this statement will not have a material effect on its financial statement
disclosures.

2. SUBSTANTIAL DOUBT REGARDING ABILITY TO CONTINUE AS A GOING CONCERN

SIGNIFICANT OPERATING LOSSES - ACCUMULATED DEFICIT

Since July 1990, the Company has been engaged almost exclusively in research and
development activities focused on developing proprietary saliva based collection
devices and rapid assays for infectious diseases. Other than sales of the
Company's collection devices, the Company has not yet commenced any significant
product commercialization. The Company has incurred significant operating losses
since its inception, resulting in an accumulated deficit of $28,526,458 at
December 31, 1997. Such losses are expected to continue for the foreseeable
future and until such time, if ever, as the Company is able to attain sales
levels sufficient to support its operations. There can be no assurance that the
Company will achieve or maintain profitability in the future. Despite the
Company's stock financing in January 1998 (see Note 15), substantial additional
financing will be required in 1998. There can be no assurances that such
financing will be achieved.

The Company's capital requirements have been and will continue to be
significant. The Company's capital base is smaller than that of many of its
competitors, and there can be no assurance that the Company's cash resources
will be able to sustain its business. The Company is dependent upon its effort
to raise capital to finance its future operations, including the cost of
development, manufacturing and marketing of its products, to conduct clinical
trials and submissions for FDA approval of its products and to continue the
design and development of its new products. Marketing, manufacturing and
clinical testing may require capital resources substantially greater than the
resources available to the Company. The Company will continue to seek public or
private placement of its equity securities and corporate partners to develop
products. The Company's future capital needs will depend upon numerous factors,
including the progress of the approval for sale of the Company's products in
various countries, including the United States, the extent and timing of the
acceptance of the Company's products, the cost of marketing and manufacturing
activities and the amount of revenues generated from operations, none of which
can be predicted with much certainty. The accompanying consolidated financial
statements have been prepared assuming that the Company will continue as a going
concern. The Company's significant operating losses and significant capital
requirements, however, raise substantial doubt about the Company's ability to
continue as a going concern. The consolidated financial statements do not
include any adjustments that might result from the outcome of this uncertainty.

                                      F-11
<PAGE>   63

3. RESTRUCTURING

Results of operations of 1997 included a charge associated with a restructuring
plan designed to reduce costs and improve manufacturing and operational
efficiencies. Under the plan, the Company closed its Singapore manufacturing
operations in October 1997. The Company plans to out-source manufacturing
previously performed in Singapore to qualified sources and locations. Total
costs accrued in connection with the restructuring at the end of the third
quarter of 1997 were $194,000 and included approximately $100,000 related to
termination of employees, approximately $37,000 associated with the settlement
of the lease obligation in Singapore, $47,000 for other costs related to closing
the Singapore location and $10,000 non-cash charge for the write-off of
leasehold improvements. The change in the restructuring reserve during the
fourth quarter of 1997 consisted of approximately $61,000 of additional employee
termination costs and a $24,000 charge related to portion of the cumulative
foreign translation account related to Singapore operation.

4. INVENTORIES

Inventories consisted of the following:

<TABLE>
<CAPTION>

                                         December 31,
                                  ---------------------------
                                       1997          1996
                                     ---------     ----------
       <S>                        <C>            <C>
       Raw materials              $   280,438    $   253,000
       Work in process                 11,569          2,495
       Finished goods                 166,170         12,936
                                  ============   ============
                                  $   458,177    $   268,431
                                  ============   ============
</TABLE>

5. PROPERTY AND EQUIPMENT

Property and equipment consisted of the following:
<TABLE>
<CAPTION>

                                         December 31,
                                     ------------------------
                                       1997           1996
                                     ---------      ---------
<S>                               <C>            <C>
Office furniture and equipment    $    57,988    $   114,041
Machinery and equipment             1,105,025        861,957
Leasehold improvements                 71,568         97,582
Vehicles                              164,774        181,423
Exhibits                               30,955         30,955
                                     ---------      ---------
                                    1,430,310      1,285,958

  Less: accumulated depreciation
   and amortization                  (995,853)      (792,309)
                                     ---------      ---------
                                  $   434,457    $   493,649
                                     =========      =========
</TABLE>

                                      F-12
<PAGE>   64

6. ACCRUED EXPENSES

Accrued expenses consisted of the following:
<TABLE>
<CAPTION>

                                         December 31,
                                     ------------------------
                                       1997           1996
                                     ---------      ---------
<S>                               <C>             <C>
Accrued wages and salaries        $   493,352     $  149,599
Accrued payroll taxes                  92,144        131,681
Accrued restructuring expenses        135,522              -
Accrued litigation expenses           750,000        250,000
Other accrued liabilities               2,926          9,501
                                     ---------      ---------
                                  $ 1,473,944     $  540,781
                                     =========      =========
</TABLE>


7. SHAREHOLDERS' EQUITY

On February 20, 1997, at a Special Meeting of Shareholders, the shareholders of
the Company approved an amendment to the Company's Certificate of Incorporation
increasing the number of authorized shares of the Company's Common Stock, par
value $.01 per share, from 25,000,000 to 33,000,000 shares.

On November 21, 1997, at a Special Meeting of Shareholders, the shareholders of
the Company approved an amendments to the Company's Certificate of Incorporation
(i) increasing the number of authorized shares of the Company's Common Stock,
par value $.01 per share, from 33,000,000 to 50,000,000, and (ii) authorizing
the creation of a new class of stock, designated "Preferred Stock." The
Preferred Stock is issuable in one or more series on terms and conditions to be
established by the Board of Directors of the Company. Designations, preferences,
conversion rights, cumulative rights, and relative, participation, optional and
other rights, including voting rights, qualifications, limitations or
restrictions, thereof, are determined by the Board of Directors of the Company.

CONVERSION OF CONVERTIBLE DEBENTURES IN 1996

During 1995, the Company sold privately $3,685,000 of its 9% convertible
debentures payable on October 31, 1996. During 1996, certain debenture holders
converted $2,760,000 principal amount of debentures into 6,212,308 shares of
common stock. At December 31, 1996, all of the debentures had been converted
into shares of common stock.

WARRANTS OUTSTANDING

In March 1993, in connection with its initial public offering, the Company
issued publicly traded warrants to purchase 1,380,000 shares of the Company's
stock at $1.25, which expire on March 31, 1998.

In 1995, in connection with consulting services rendered, the Company issued
warrants to purchase 400,000 shares of the Company's Common Stock at $1.00 per
share, which expire on

                                      F-13
<PAGE>   65

March 31, 1998, of which warrants to purchase 90,000 shares were outstanding at
December 31, 1997.

In November 1995, the Company issued warrants to purchase 95,000 shares of the
Company's Common Stock at 50% of the Nasdaq closing bid price of the day prior
to exercise, which expire on November 1, 2001, of which warrants to purchase
60,000 shares were outstanding at December 31, 1997.

In March 1997, in connection with the sale of Convertible Debentures, the
Company issued warrants to purchase 89,552 shares of the Company's Common Stock
at $1.34 per share, which expire on March 14, 2004, all of which were
outstanding at December 31, 1997.

In September 1997, in connection with private placements, the Company issued
warrants to purchase 194,632 shares of the Company's Common Stock at $0.50 per
share, and 33,032 shares of the Company's Common Stock at $0.72656 per share
which expire on June 30, 2002, and 100,000 shares of the Company's Common Stock
at $1.00 per share which expire on January 1, 2003, all of which were
outstanding at December 31, 1997.

1997 FINANCINGS

In March 1997, the Company raised net proceeds of approximately $1,380,000 (net
of issuance costs of $120,000) from the private sale of the 7.5% convertible
debentures due February 28, 1999 (the "Debentures"). In connection with the
issuance of the Debentures, the Company also issued warrants to Grayson &
Associates, Inc. ("Grayson") in consideration of certain financial consulting
services performed on behalf of the Company related to the sale of the
Debentures. The warrants entitle the holder thereof to purchase up to 89,552
shares of Common Stock from the Company for a purchase price of $1.34 per share
on or before March 14, 2002. (The warrantholder has certain demand and piggyback
registration rights with respect to the shares that may be issued upon exercise
of the warrants.) In May and June 1997, the holders of the Debentures agreed to
an acceleration of conversion and to hold the Common Stock issued pursuant to
such conversion (the "Early Conversion Shares") in accordance generally with the
original conversion schedule. On June 5, 1997, $800,000 in principal amount of
the Debentures were converted into a total of 833,598 shares of the Company's
Common Stock and on June 30, 1997 the remaining $700,000 in principal amount of
the Debentures were converted into a total of 903,226 shares of the Company's
Common Stock. A total of $29,395 of accrued interest on the converted Debentures
payable June 30, 1997 was paid to holders of the Debentures in the form of
27,604 shares of the Company's Common Stock. In addition, the Company agreed to
certain conversion reset provisions, pursuant to which the holders of the Early
Conversion Shares may receive certain additional shares of the Company's Common
Stock under certain conditions. In accordance with such provisions, one holder
of the Debentures exercised his right to receive an additional 57,720 shares on
October 15, 1997 and 342,330 shares on January 9, 1998, and the other holder of
the Debentures exercised its right to receive an additional 305,922 shares on
November 5, 1997 and 856,521 shares on January 9, 1998. No further rights or
obligations for the issuance of Common Stock are outstanding under the terms of
the Debentures.
                                      F-14

<PAGE>   66

The number of shares of Common Stock issuable upon the conversion of the
Debentures was determined by dividing the principal amount of the Debentures
converted by the Conversion Price, as defined in the Debentures. The conversion
price was defined as the lesser of 115% of Company's Common Stock market price
at issuance of the Debenture (i.e. $1.9191 per share) or 80% of the Company's
Common Stock market price at conversion of the Debenture.

A discount had been recorded at the date of issuance of the Debentures,
resulting from an allocation of proceeds to the discounted conversion feature,
which was to be amortized to interest expense over the conversion period.
Additionally, financing costs related to these Debentures were deferred and
amortized, using the effective interest method, over the term of the Debentures.
The discount and remaining unamortized financing costs of $375,000 and $99,800,
respectively, were written off to interest expense and additional paid in
capital, respectively, upon conversion of the Debentures.

On June 30, 1997, the Company entered into two separate common stock
subscription agreements for the issuance and sale of shares of the Company's
Common Stock pursuant to Regulation D, promulgated under the Securities Act of
1933, as amended (the "Offering"). Pursuant to a Common Stock Purchase Agreement
between the Company and certain investors named therein (the "Investors"), the
Company sold a total of 2,420,000 shares of Common Stock to the Investors for an
aggregate purchase price of $1,210,000, $612,500 of which was subscribed for by
Investors as of June 30, 1997. Pursuant to a Common Stock Purchase Agreement
between the Company and The Tail Wind Fund Ltd. ("Tail Wind"), the Company sold
a total of 412,905 shares of Common Stock to Tail Wind for an aggregate purchase
price of $300,000. The closing on $337,500 principal amount of the Offering to
the Investors and $300,000 principal amount of the Offering to Tail Wind took
place on July 14, 1997; the closing of $547,500 principal amount of the Offering
to the Investors took place on July 17, 1997; and the closing of the remaining
$325,000 principal amount of the Offering to the Investors took place on July
22, 1997.

On August 22, 1997, the Company entered into a Common Stock Subscription
Agreement for the issuance and sale of shares of the Company's Common Stock
pursuant to Regulation D, (the "August Offering.") Pursuant to a Common Stock
Purchase Agreement between the Company and an investor named therein (the
"August Investor") the Company sold a total of 1,250,000 shares of Common Stock
for an aggregate purchase price of $750,000. The Closing of the August Offering
took place on August 26, 1997.

Tail Wind and the August Investor are entitled to receive additional shares of
Common Stock under their respective agreements subject to certain conditions
related to the trading price of the Company's Common Stock during a specified
period. In accordance with such provisions, the August Investor exercised his
right to receive an additional 1,035,714 shares on December 16, 1997. Tail Wind
may still be able to exercise its rights under certain circumstances. The Common
Stock purchased in the Offering and the August Offering (collectively referred
to as "the Offerings") is subject to certain resale restrictions. In connection
with the Offerings, the Company also entered into separate registration rights
agreements with the Investors, Tail Wind, and the August Investor under each of
which the Company is required to file a registration

                                      F-15

<PAGE>   67

statement covering resales of shares of the Common Stock sold in the Offering
within 30 days after the date on which the closing relating to those shares
occurred. A registration statement on Form S-3 covering resales of such shares
was declared effective on September 30, 1997. Because the Company is no longer
eligible to file on Form S-3 due to the delisting of the Company's securities
from Nasdaq, the Company intends to file a post effective amendment to the
registration statement on Form SB-2.

In connection with the Offerings, the Company paid a finder's fee to Grayson &
Associates, Inc. ("Grayson") of $104,800 in cash and warrants to purchase
161,600 shares of the Company's Common Stock for an exercise price of $0.50 per
share, and 33,032 shares of the Company's Common Stock for an exercise price of
$0.72656 per share, all of which expire on June 30, 2002. The Company also
issued to Tail Wind warrants to purchase up to 100,000 shares of the Company's
Common Stock, exercisable at any time from January 1, 1998 to January 1, 2003,
at an exercise price of $1.00 per share. Grayson and Tail Wind have certain
registration rights with respect to the shares of Common Stock that may be
issued upon exercise of their respective warrants. The registration statement on
Form S-3 which was declared effective on September 30, 1997, covered resales of
these shares.

NOTE RECEIVABLE RELATED TO SALE OF STOCK

In January 1992, the Company sold to its President, who resigned in December
1996, 366,912 shares of common stock for $92,970 for a note payable to the
Company in that amount. In 1995, $9,145 of principal on the note was paid. The
note bore interest at 6% per annum, and was originally due December 1994, but
later extended until December 1995. In December 1995, the Company extended the
note for another year. The note was due on December 31, 1996 and, at December
31, 1997, $83,825 plus unpaid accrued interest was outstanding.

8. STOCK-BASED COMPENSATION PLANS

The Company has two stock option plans, a "1992 Plan", under which 350,000
shares of its common stock have been reserved for issuance, and a "1994 Plan",
under which 350,000 shares of its common stock have been reserved for issuance.
Under both plans, the Company's Board of Directors may grant either incentive
stock options with an exercise price of not less than the fair market value of
the common stock at the date of grant or non-qualified stock options with an
exercise price of not less than 85% of the fair market value of the common stock
at the date of grant. The Board of Directors shall determine the period of each
option and the time or times at which options may be exercised and any
restrictions on the transfer of stock issued upon exercise of any options. Both
plans also provide for certain automatic grants to each non-employee director at
a price of 100% of fair market value of the common stock at the time of grant.
Options generally vest over a period of six months and are exercisable over a
period of five years. The following table summarizes all stock option activity
for options granted under the 1992 Plan and the 1994 Plan, and for non-plan
options, during the years ended December 31, 1997 and 1996:

                                      F-16

<PAGE>   68
<TABLE>
<CAPTION>


                                          Number of          Option Price
                                           Shares               Range
                                       ----------------    -----------------
<S>                                          <C>            <C>
Outstanding at December 31, 1995             1,623,500      $0.60 - $6.88
Options granted                                302,500       0.43 - 2.38
Options exercised                             (104,750)      0.60 - 2.38
Options expired or canceled                     (6,000)      0.60 - 1.38
                                       ----------------    -----------------
Outstanding at December 31, 1996             1,815,250       0.43 - 6.88
Options granted                              1,750,000           0.41
Options exercised                               (7,150)      0.43 - 0.60
Options expired or canceled                   (404,600)      0.43 - 2.38
                                       ----------------    -----------------
Outstanding at December 31, 1997             3,153,500      $0.41 - $6.88
                                       ================    =================
</TABLE>

STATEMENT OF FINANCIAL ACCOUNTING STANDARDS NO. 123

The Company has adopted the disclosure provisions of Financial Accounting
Standards Board Statement No. 123 ("SFAS 123") which defines a fair value based
method of accounting for employee stock options and similar equity instruments
and encourages all entities to adopt that method of accounting for all employee
stock-based compensation plans. However, SFAS 123 also allows an entity to
continue to measure compensation cost for such plans using the method of
accounting prescribed by Accounting Principles Board Opinion No. 25 ("APB 25").
Entities electing to remain with the accounting as prescribed by APB 25 must
make pro forma disclosures of net income and, if presented, earnings per share,
as if the fair value based method of accounting defined in SFAS 123 had been
adopted.

The Company has elected to account for its stock-based compensation plans using
APB 25. The Company has computed, for pro forma disclosure purposes, the value
of options granted during fiscal year 1997 and 1996 using the Black-Scholes
pricing model.

The following weighted average assumptions were used in the computations for the
years ended December 31, 1997 and 1996:

<TABLE>
<CAPTION>

                                             1997                1996
                                       ----------------    ------------------
<S>                                         <C>                  <C>
Expected dividend yield                      0%                     0%
Expected stock price volatility             203%                  150%
Risk-free interest rate                      6%                     6%
Expected life of options - years            five                  three
</TABLE>



The total value of options granted during 1997 and 1996 was $805,000 and
$366,200, respectively, which vested upon grant. The weighted average fair value
of options granted during 1997 and 1996 was $0.46 and $1.21, respectively.

                                      F-17

<PAGE>   69

If the Company had accounted for its stock-based compensation plans in
accordance with SFAS 123, the Company's net loss and net loss per share would
have approximated the pro forma amounts shown below:

<TABLE>
<CAPTION>


                                             1997                 1996
                                       ----------------     ------------------
<S>                                    <C>                  <C>
Net loss as reported                   $   (6,612,212)      $     (5,152,399)
Net loss pro forma                         (7,017,212)            (5,518,599)
Loss per share as reported                      (0.27)                 (0.26)
Loss per share pro forma                        (0.28)                 (0.27)
</TABLE>



The effect of applying SFAS 123 in this pro forma disclosure is not indicative
of future results. SFAS 123 does not apply to awards prior to January 1, 1995.

The following table summarizes the information about stock options outstanding
at December 31, 1997:

<TABLE>
<CAPTION>


                       Options Outstanding                                   Options Exercisable
- -------------------------------------------------------------------   ----------------------------------
                                         Weighted        Weighted                          Weighted
                                         Average         Average                           Average
    Range of            Number          Remaining        Exercise         Number           Exercise
 Exercise Prices    Outstanding at     Contractual        Price       Exercisable at        Price
    Per Share        Dec. 31, 1997    Life (months)     Per Share     Dec. 31, 1997       Per Share
    ---------        -------------    -------------     ---------     -------------       ---------
<S>                    <C>                <C>             <C>          <C>                <C>                
$0.41 -   $0.60        1,852,000          113.3           $0.41          1,852,000           $0.41
$1.00 -   $1.38        1,242,000           17.3            1.08          1,240,500            1.08
$2.19 -   $2.63           53,500           16.2            2.49             53,500            2.49
$5.25 -   $6.88            6,000            9.0            6.07              6,000            6.07
                     ------------                                      ------------   
                       3,153,500                                         3,152,000    
                     ============                                      ============   
</TABLE>



9. INCOME TAXES

The Company has a net operating loss carryforward of approximately $21 million
which is available to offset future taxable income, if any, expiring through the
year 2012. The Company is in a net deferred tax asset position and has generated
net operating losses to date. Accordingly, no provision for or benefit from
income taxes has been recorded in the accompanying statements of operations. The
Company will continue to provide a valuation allowance for its deferred tax
assets until it becomes more likely than not, in management's assessment, that
the Company's deferred tax assets will be realized.

10. LONG-TERM DEBT AND OBLIGATIONS UNDER CAPITAL LEASES

The Company has a note payable to a bank which bears interest at 6.940% per
annum and is payable in equal annual installments over 60 months. The note is
secured by a time deposit in the

                                      F-18

<PAGE>   70

amount of $120,500. The Company has acquired vehicles under notes requiring 48
to 60 payments of $1,842 per month including interest at 6% to 10% per annum.

The following represents the maturity schedule as of December 31, 1997:

<TABLE>
    <S>            <C>
    1998           $ 33,779
    1999             22,536
    2000             24,151
    2001             12,714
                    --------
                     93,180

    Less current
    portion          33,779
                    --------
                   $ 59,401
                    ========
</TABLE>


11. OPERATING LEASES

The Company leases its offices and laboratory spaces, under operating leases
with initial terms of three to seven years. Future minimum lease payments by
year and in the aggregate, under noncancelable operating leases with initial or
remaining lease terms in excess of one year, consisted of the following at
December 31, 1997:

<TABLE>
<CAPTION>

     Year Ended
     December 31,
     <S>              <C>
     1998             $ 162,475
     1999               170,059
     2000               169,788
     2001               165,254
     2002               108,282
     Thereafter               -
                       ---------
                      $ 775,858
                       =========
</TABLE>



Rent expense for the years ended December 31, 1997 and 1996 was $330,920 and
$301,106, respectively.

                                      F-19

<PAGE>   71

12. SEGMENT INFORMATION

<TABLE>
<CAPTION>

                                December 31,
                        ---------------------------
                          1997             1996
                        ----------       ----------
<S>                   <C>             <C>
Product sales:

   United States      $   584,467     $    393,635
   Asia                   453,308           79,218
   United Kingdom         384,521          242,927
                        ----------       ----------
      Total           $ 1,422,296     $    715,780
                        ==========       ==========


Operating loss:

   United States     $ (5,734,653)    $ (4,478,691)
   Asia                  (225,307)        (621,958)
   United Kingdom        (259,349)        (122,487)
                        ----------       ----------
      Total          $ (6,219,309)    $ (5,223,136)
                        ==========       ==========

Identifiable
assets:

   United States     $  1,422,034     $  1,687,866
   Asia                         -          368,562
   United Kingdom         217,043          121,773
                       -----------       ----------
      Total          $  1,639,077     $  2,178,201
                       ===========       ==========
</TABLE>





13. COMMITMENTS AND CONTINGENCIES

Luc Hardy, a former director and officer of the Company, filed a complaint in
Federal court against the Company and several individual defendants, including
former directors and officers of the Company, making certain allegations,
including breach of Mr. Hardy's employment agreement with the Company,
intentional interference with contract by the individual defendants, slander and
deceptive trade practices, all arising from his termination. The complaint seeks
damages and punitive damages in an unspecified amount. A jury verdict for the
plaintiff, which is not a final judgment, was rendered on July 25, 1997 in the
approximate amount of $740,000. In October 1997, a hearing was held on the
Company's motions to set aside the jury verdict and for a new trial. The Company
is currently awaiting a decision. There can be no assurance such motions will be
granted or that the final judgment in this case will not have a material adverse
effect on the Company.

In January 1997, Lealos v. Saliva Diagnostic Systems, Inc. was filed in Superior
Court in Clark County in the State of Washington by Ronald Lealos, former
President and CEO of the Company. The complaint in the lawsuit alleged various
breach of contract claims. This lawsuit was dismissed without prejudice as a
prerequisite to a settlement agreement between Mr. Lealos and the Company. The
parties did not reach a settlement and, in February 1998, Mr. Lealos filed a
complaint against the Company in the same court which alleged substantially the
same claims. The complaint seeks damages in the approximate amount of
$1,000,000. Management of the

                                      F-20

<PAGE>   72

Company intends to vigorously defend the Company. In March 1998, the Company
filed a response to the complaint and asserted numerous counterclaims against
Mr. Lealos, including breach of fiduciary duty and conversion. There can be no
assurance that the litigation will not be decided adverse to the Company and
that such an adverse decision would not have a material adverse effect on the
Company.

Immuno chromatography, the principle on which the Company's rapid tests are
based is a technology covered by existing patents. The Company has purchased a
license from the principal patent holder, Unilever PLC of the U.K., to whom
royalty payments are due for all rapid tests sold. To obtain the license, the
Company paid approximately $50,000 and will be responsible for royalty fees
equal to 5% of the net sales in all territories where the Unilever patent is
enforceable. Products covered by the license include those related to HIV,
H.pylori, Tuberculosis and Hepatitis A. Additional analyses may be negotiated as
they become available.

14. RELATED PARTIES

A member of the Board of Directors is a partner in a law firm which provides
legal services to the Company. During 1997 and 1996, the Company incurred
437,863 and 36,572, respectively, in services provided by this law firm.

15. SUBSEQUENT EVENTS

JANUARY 1998 FINANCING
On January 26, 1998, the Company entered into a Securities Purchase Agreement
with Biscount Overseas Limited (the "Investor") for the issuance and sale of
shares of the Company's newly designated Series 1998-A Convertible Preferred
Stock, stated value $1,000 per share (the "1998-A Preferred Stock") (the
"Preferred Offering"). Pursuant to the Securities Purchase Agreement, the
Company sold a total of 1,500 shares of the 1998-A Preferred Stock to the
Investor for an aggregate purchase price of $1,500,000. The Investor is entitled
to receive a number of shares of the Company's Common Stock, upon conversion of
the 1998-A Preferred Stock as determined by dividing the purchase price of the
1998-A Preferred Stock by the lesser of (i) $0.3375 (as adjusted for certain
capital events, which would include a reverse stock split), and (ii) 80% of the
average closing bid price of the Common Stock for the five trading days prior to
conversion. The closing of the Preferred Offering took place on January 26,
1998.

The Securities Purchase Agreement provides for an "Additional Offering" of up to
$1,500,000 of an additional series of the Company's preferred stock (the "1998-B
Preferred Stock") which the Investor may purchase at its option upon
substantially the same terms as the Offering. This option, which must be
exercised by the Investor on or prior to September 26, 1998, is subject to
certain limitations as specified in the Securities Purchase Agreement.

The 1998-A Preferred Stock is convertible into shares of Common Stock on or
prior to January 26, 2000, subject to the following restrictions. The Investor
may convert up to (i) 25% the 1998-A Preferred Stock at any time from and after
April 26, 1998; (ii) 50% of the 1998-A Preferred

                                      F-21

<PAGE>   73

Stock at any time from and after May 26, 1998; (iii) 75% of the 1998-A Preferred
Stock at any time from and after June 25, 1998; and (iv) all of the 1998-A
Preferred Stock at any time from and after July 25, 1998.

In connection with the Preferred Offering, the Company also entered into a
separate registration rights agreement with the Investor under which the Company
is required to file a registration statement covering resales of shares of the
Common Stock issuable upon conversion of the 1998-A Preferred Stock sold in the
Preferred Offering. Such registration statement is required to be filed on or
before February 26, 1998 and be declared effective by the Securities and
Exchange Commission by April 26, 1998. A registration statement on Form S-3 was
filed on February 26, 1998. Because the Company is no longer eligible to file on
Form S-3 due to the delisting of the Company's securities from Nasdaq, the
Company intends to file a registration statement on Form SB-2 covering resales
of these shares.

In connection with the Preferred Offerings, the Company paid a cash fee of 7.5%
of the gross proceeds of the Offering to Aryeh Trading, Inc. ("ATI"), and
attorney's fees in connection with the Preferred Offering equal to 0.5% of the
gross proceeds of the Offering to counsel to ATI. The Company also issued to the
Investor warrants to purchase up to 750,000 shares of Common Stock at an
exercise price of $0.3375 per share, which expire on January 26, 2003 (the
"Warrants"). The holder of the Warrants has certain registration rights with
respect to the shares of Common Stock that may be issued upon exercise of the
Warrants. In addition, the Company has agreed to issue to the Investor
additional warrants to purchase up to 250,000 shares of Common Stock on the same
terms as the Warrants if and when the 1998-B Preferred Stock is issued.

PROPOSED REVERSE STOCK SPLIT
The Company held a special meeting of shareholders on February 26, 1998 for
consideration of an amendment to the Company's Certificate of Incorporation
authorizing a reverse stock split of the Company's Common Stock at a ratio of up
to 10:1. The Board sought such authorization to enable the Company to increase
its per share Common Stock price for Nasdaq compliance purposes. See "Market for
Common Equity and Related Stockholder Matters." The shareholders approved the
amendment by an overwhelming majority. In light of pending developments with
Nasdaq, however, the Board of Directors deferred its decision as to whether to
implement the reverse stock split.

NASDAQ DELISTING
Effective with the close of the market on March 10, 1998, the Company's
securities were delisted from The Nasdaq SmallCap Market for failure to meet the
new Nasdaq continued listing requirements. Trading of the Company's securities
is currently being conducted in the over-the-counter market on the OTC Bulletin
Board. See "Market for Common Equity and Related Stockholder Matters."

                                      F-22
<PAGE>   74


                         SALIVA DIAGNOSTIC SYSTEMS, INC.
                           CONSOLIDATED BALANCE SHEETS
                                (UNAUDITED)
<TABLE>
<CAPTION>

                                                                 March 31,              December 31,
                                                                   1998                     1997
                                                               --------------          ---------------
<S>                                                         <C>                      <C>
ASSETS
Current assets:
 Cash                                                     $        575,211         $        271,312
 Accounts receivable, less allowance of
  $42,000 1998 and 1997                                            192,690                  154,052
 Inventories                                                       458,520                  458,177
 Prepaid expenses                                                   48,609                   51,876
                                                                -------------           --------------
  Total current assets                                           1,275,030                  935,417
 Property and equipment, less accumulated
  depreciation of $977,661 (1998) and
  $995,853 (1997)                                                  370,791                  434,457
 Deposits                                                           31,125                   40,162
 Restricted cash                                                   120,500                  120,500
 Patents and trademarks, less accumulated
  amortization of $50,673 (1998) and
  $48,375 (1997)                                                   106,243                  108,541
                                                                -------------           --------------
                                                          $      1,903,689         $      1,639,077
                                                                =============           ==============

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
 Accounts payable                                         $        450,859         $        670,400
 Accrued expenses                                                1,423,429                1,473,944
 Accrued interest payable                                           68,240                   68,240
 Current portion of long-term debt and
  obligations under capital leases                                  20,557                   33,779
                                                                -------------           --------------
   Total current liabilities                                     1,963,085                2,246,363
Long-term debt and obligations under capital
 leases, net of current portion                                     54,735                   59,401
                                                                -------------           --------------
    Total liabilities                                            2,017,820                2,305,764

   Series 1998-A Convertible Redeemable Preferred
   Stock, $.01 par value, 1,500 shares issued and
   outstanding                                                   1,157,203                        -

Stockholders' equity:
  Common stock , $.01 par value, 50,000,000
   shares authorized; shares issued and
   outstanding: 30,543,475 (1998)
   and 29,344,624 (1997)                                           305,435                  293,447
  Preferred Stock, $.01 par value, 1,000,000
   authorized (1,500 Series 1998-A Convertible
   issued and outstanding, see above)
  Additional paid-in capital                                    28,183,935               27,650,149
  Note receivable from shareholder for stock                       (83,825)                 (83,825)
  Accumulated deficit                                          (29,676,879)             (28,526,458)
                                                               -------------            -------------
   Total stockholders' equity                                   (1,271,334)                (666,687)
                                                               -------------            -------------
                                                          $      1,903,689         $      1,639,077
                                                               =============            =============
</TABLE>

      The accompanying notes are an integral part of these balance sheets.

                                      F-23

<PAGE>   75


                       SALIVA DIAGNOSTIC SYSTEMS, INC.
                    CONSOLIDATED STATEMENTS OF OPERATIONS
                                  UNAUDITED

<TABLE>
<CAPTION>

                                                               Three months ended
                                                                     March 31,
                                                      --------------------------------------
                                                            1998                 1997
                                                      ------------------    ----------------


<S>                                               <C>                   <C>
Revenues                                          $         197,578     $       227,034

Costs and expenses:
 Cost of products sold                                      252,700             259,641
 Research and development expense                           172,379             194,712
 Selling, general and administrative
  expense                                                   646,377             953,913
                                                     ---------------       -------------
   Loss from operations                                    (873,878)         (1,181,232)



Interest income                                               6,575               5,679
Interest expense                                             (1,405)             (8,578)
Other income                                                 43,740               9,230
                                                     ---------------       -------------
   Net loss                                                (824,968)         (1,174,901)

Dividends including deemed dividends on
 preferred stock                                           (325,453)                  -
                                                     ---------------       -------------
   Net loss to common stockholders               $       (1,150,421)    $    (1,174,901)
                                                     ===============       =============
Basic and diluted net loss per share             $            (0.04)    $         (0.05)
                                                     ===============       =============
Shares used in basic and diluted
per share calculations                                  30,423,590          22,040,784
                                                      ===============       =============
</TABLE>




















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

                                      F-24
<PAGE>   76
                       SALIVA DIAGNOSTIC SYSTEMS, INC.
                    CONSOLIDATED STATEMENTS OF CASH FLOWS
                                  UNAUDITED

<TABLE>
<CAPTION>
                                                                          Three months ended
                                                                               March 31,
                                                                ----------------------------------------
                                                                      1998                   1997
                                                                -----------------      -----------------
<S>                                                            <C>                    <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
 Net loss                                                      $      (824,968)       $    (1,174,901)
 Adjustments to reconcile net loss to net cash
  used in operating activities:
   Cumulative foreign translation adjustment                            (2,476)               (10,466)
   Depreciation and amortization                                        68,490                 69,053
   Gain on sale of property and equipment                              (43,479)                     -
 Changes in current assets and liabilities:
  Accounts receivable                                                  (38,638)               136,643
  Inventories                                                             (343)                (7,304)
  Prepaid expenses and deposits                                         12,304                (12,377)
  Accounts payable and accrued expenses                               (270,056)               263,569
                                                                   -------------          -------------
   Net cash used in operating activities                            (1,099,166)              (735,783)

CASH FLOWS FROM INVESTING ACTIVITIES:
 Proceeds from sale of property and equipment                           33,482                      -
 Acquisitions of property and equipment                                 (3,536)               (18,984)
                                                                   -------------          -------------
  Net cash provided by (used in) investing activities                   29,946                (18,984)

CASH FLOWS FROM FINANCING ACTIVITIES:
 Proceeds from sale of preferred stock, net of issuance costs        1,380,000                      -
 Proceeds from convertible debentures, net of issuance costs                 -              1,380,000
 Repayment of long term debt and capital lease obligations              (6,881)                (8,376)
                                                                   -------------          -------------
  Net cash provided by financing activities                          1,373,119              1,371,624
                                                                   -------------          -------------

  Net increase (decrease) in cash and cash equivalents                 303,899                616,857
   Cash and cash equivalents, beginning of period                      271,312                776,380
                                                                   -------------          -------------
   Cash and cash equivalents, end of period                    $       575,211        $     1,393,237
                                                                   =============          =============

SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:

  Cash paid during the period for interest                     $         1,405        $         8,578

  Debt extinguished on disposition of property
   and equipment                                               $        11,007        $             -
</TABLE>

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

                                      F-25

<PAGE>   77
                       SALIVA DIAGNOSTIC SYSTEMS, INC.

                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. BASIS OF PRESENTATION

The accompanying unaudited consolidated financial statements as of and for the
three month periods ended March 31, 1998 and 1997 have been prepared in
conformity with generally accepted accounting principles. The financial
information as of December 31, 1997 is derived from Saliva Diagnostic Systems,
Inc. (the "Company") consolidated financial statements included in the Company's
Annual Report on Form 10-KSB/A for the year ended December 31, 1997. Certain
information or footnote disclosures normally included in consolidated financial
statements prepared in accordance with generally accepted accounting principles
have been condensed or omitted, pursuant to the rules and regulations of the
Securities and Exchange Commission. In the opinion of management, the
accompanying consolidated financial statements include all adjustments necessary
(which are of a normal and recurring nature) for the fair presentation of the
results of the interim periods presented. The accompanying consolidated
financial statements should be read in conjunction with the Company's audited
financial statements for the year ended December 31, 1997, as included in the
Company's Annual Report on Form 10-KSB/A for the year ended December 31, 1997.

Operating results for the three month period ended March 31, 1998 are not
necessarily indicative of the results that may be expected for the entire fiscal
year ending December 31, 1998, or any other portion thereof.

2. INVENTORIES

Inventories are stated at the lower of cost or market determined on a first-in,
first-out (FIFO) basis, and consist of the following:

<TABLE>
<CAPTION>


                                                        March 31,          December 31,
                                                          1998                 1997
                                                      --------------      ---------------
                   <S>                                <C>                 <C>
                   Raw materials                      $     278,608       $      280,438
                   Work in process                           10,023               11,569
                   Finished goods                           169,889              166,170
                                                      --------------      ---------------
                                                      $     458,520       $      458,177
                                                      ==============      ===============
</TABLE>

3. LOSS PER SHARE

In February 1997, the Financial Accounting Standards Board (FASB) issued
Statement of Financial Accounting Standards No. 128, "Earnings per Share" (SFAS
128). SFAS 128 changes the standards for computing and presenting earnings per
share (EPS) and supersedes Accounting Principles Board Opinion No. 15, "Earnings
per Share." This Statement requires restatement of all prior-period EPS data
presented. The Company implemented SFAS 128 for its year ended December 31,
1997.

Basic earnings per common share is computed using the weighted average number of
shares of common stock outstanding for the period. Diluted earnings per common
share is computed using the weighted average number of shares of common stock
and dilutive common equivalent shares related to stock options and warrants
outstanding during the period.

As it relates to the Company, the principal differences between the provisions
of SFAS 128 and previous authoritative pronouncements are the exclusion of
common stock equivalents in the determination of Basic Earnings Per Share and
the market price at which common stock equivalents are calculated in the
determination of Diluted Earnings Per Share. The adoption of SFAS 128 had no
effect on previously reported loss per share amounts for the quarter ended March
31, 1997. A net loss was reported in the first quarter of 1997, and accordingly,
the denominator was equal to the weighted average outstanding shares with no
consideration for outstanding options

                                      F-26

<PAGE>   78

and warrants to purchase shares of the Company's common stock, because to do so
would have been anti-dilutive. Stock options for the purchase of 2,195,500
shares, warrants for the purchase of 1,567,216 shares and 11,842,038 shares
which represent the number of common shares that preferred stock would convert
into at March 31, 1998 were not included in loss per share calculations, because
to do so would have been anti-dilutive.

4. ACCRUED EXPENSES

<TABLE>
<CAPTION>

                                                       March 31,           December 31,
                                                          1998                  1997
                                                      -------------         -------------
<S>                                               <C>                     <C>
Accrued wages and salaries                        $        471,948        $      493,352
Accrued payroll taxes                                       65,959                92,144
Accrued restructuring expenses                             135,522               135,522
Litigation contingencies                                   750,000               750,000
Other accrued liabilities                                        -                 2,926
                                                      -------------          ------------
                                                  $      1,423,429        $    1,473,944
                                                      =============          ============
</TABLE>

5. SERIES 1998-A CONVERTIBLE REDEEMABLE PREFERRED STOCK

On January 26, 1998, the Company entered into a Securities Purchase Agreement
with an investor for the issuance and sale of shares of the Company's newly
designated Series 1998-A Convertible Preferred Stock, stated value $1,000 per
share (the "1998-A Preferred Stock") (the "Preferred Offering"). Pursuant to the
Securities Purchase Agreement, the Company sold a total of 1,500 shares of the
1998-A Preferred Stock to an investor for an aggregate purchase price of
$1,500,000. See Management's Discussion and Analysis-Liquidity and Capital
Resources for additional disclosure regarding the 1998-A Preferred Stock.

The 1998-A Preferred Stock is convertible into Common Stock of the Company at a
beneficial conversion ratio, and as a result, a discount of $300,000 was
recorded at the date of issuance of the 1998-A Preferred Stock. The discount
will be accreted to deemed preferred dividends over the conversion period, which
ends July 25, 1998. Additionally, the Company incurred offering costs related to
the 1998-A Preferred Stock totaling approximately $120,000. These offering costs
are reflected as a discount to the 1998-A Preferred Stock and will be accreted
as deemed preferred dividends over the conversion period, which ends July 25,
1998. At March 31, 1998, $197,708 had been recorded as deemed dividends,
relating to the beneficial conversion ratio and offering costs.

In connection with the issuance of the 1998-A Preferred Stock, the Company
issued warrants to purchase up to 750,000 shares of Common Stock at an exercise
price of $0.3375 per share, which expire on January 26, 2003. The fair value of
these warrants of $248,250 has been reflected as a discount to the 1998-A
Preferred Stock and will be accreted as deemed preferred dividends over the
conversion period, which ends July 25, 1998. At March 31, 1998, $127,745 had
been recorded as deemed dividends related to the fair value of the warrants.

6. IMPACT OF RECENT ACCOUNTING PRONOUNCEMENTS

In June 1997, the FASB issued Statement of Financial Accounting Standards No.
130, "Reporting Comprehensive Income" (SFAS 130). This statement establishes
standards for reporting and displaying comprehensive income and its components
in a full set of general purpose financial statements. The objective of SFAS 130
is to report a measure of all changes in equity of an enterprise that result
from transactions and other economic events of the period other than
transactions with owners. The Company adopted SFAS 130 during the first quarter
of 1998. Comprehensive loss did not differ from currently reported net loss in
the periods presented.

7. CONTINGENCIES

Luc Hardy, a former director and officer of the Company, filed a complaint in
Federal court against the Company and several individual defendants, including
former directors and officers of the Company, making certain

                                      F-27

<PAGE>   79

allegations, including breach of Mr. Hardy's employment agreement with the
Company, intentional interference with contract by the individual defendants,
slander and deceptive trade practices, all arising from his termination. The
complaint seeks damages and punitive damages in an unspecified amount. A jury
verdict for the plaintiff, which is not a final judgment, was rendered on July
25, 1997 in the approximate amount of $740,000. In October 1997, a hearing was
held on the Company's motions to set aside the jury verdict and for a new trial.
The Company is currently awaiting a decision. There can be no assurance such
motions will be granted. A final judgment in this case consistent with the jury
verdict will have a material adverse effect on the Company.

In January 1997, Lealos v. Saliva Diagnostic Systems, Inc. was filed in Superior
Court in Clark County in the State of Washington by Ronald Lealos, former
President and CEO of the Company. The complaint in the lawsuit alleged various
breach of contract claims. This lawsuit was dismissed without prejudice as a
prerequisite to a settlement agreement between Mr. Lealos and the Company. The
parties did not reach a settlement and, in February 1998, Mr. Lealos filed a
complaint against the Company in the same court which alleged substantially the
same claims. The complaint seeks damages in the approximate amount of
$1,000,000. Management of the Company intends to vigorously defend the Company.
In March 1998, the Company filed a response to the complaint and asserted
numerous counterclaims against Mr. Lealos, including breach of fiduciary duty
and conversion and the Company is seeking damages in excess of $1,500,000. There
can be no assurance that the litigation will not be decided adverse to the
Company and that such an adverse decision would not have a material adverse
effect on the Company.

                                      F-28
<PAGE>   80

      No dealer, sales representative or other individual has been authorized to
give any information or make any representation not contained in this Prospectus
in connection with this offering other than those contained in this Prospectus
and if given or made, such information or representation must not be relied upon
as having been authorized by the Company. This Prospectus does not constitute an
offer to sell or solicitation of an offer to buy the Common Stock by anyone in
any jurisdiction in which such offer or solicitation is not authorized or in
which the person making such offer or solicitation is not qualified to do so or
to any person to whom it is unlawful to make such offer or solicitation. Neither
the delivery of this Prospectus nor any sale made hereunder shall under any
circumstances create an implication that the information contained herein is
correct as of any time subsequent to its date.

                                TABLE OF CONTENTS
<TABLE>
<CAPTION>

                                                                                             Page
<S>                                                                                          <C>
Available Information..........................................................................2
Information Incorporated by Reference..........................................................2
Prospectus Summary.............................................................................3
Risk Factors...................................................................................5
The Company...................................................................................13
Management's Discussion and Analysis..........................................................26
Market for Registrant's Common Equity and Related Stockholder Matters.........................34
Management....................................................................................35
Executive Compensation and Other Matters......................................................36
Security Ownership of Certain Beneficial Owners and Management................................40
Selling Shareholders..........................................................................42
Description of Securities.....................................................................44
Plan of Distribution..........................................................................46
Legal Matters.................................................................................47
Experts.......................................................................................47
Changes in Accountants........................................................................47
Indemnification of Directors and Officers.....................................................48
Additional Information........................................................................49
Index to Financial Statements................................................................F-1
</TABLE>

      Until July __, 1998 (40 days after the date of the Prospectus), all
dealers effecting transactions in the registered securities, whether or not
participating in this distribution, may be required to deliver a prospectus.
This delivery requirement is in addition to the obligation of dealers to deliver
a prospectus when acting as underwriters and with respect to their unsold
allotments or subscriptions.

                         SALIVA DIAGNOSTIC SYSTEMS, INC.

                        6,896,623 SHARES OF COMMON STOCK

                                   PROSPECTUS

                                  MAY __, 1998


<PAGE>   81



                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 24. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

      Section 145 of the Delaware General Corporation Law empowers a corporation
to indemnify its directors and officers and to purchase insurance with respect
to liability arising out of their capacity or status as directors and officers
provided that this provision shall not eliminate or limit the liability of a
director (i) for any breach of the director's duty of loyalty to the Corporation
or its stockholders, (ii) for acts or omissions not in good faith or which
involve intentional misconduct or a knowing violation of law, (iii) arising
under Section 174 of the General Corporation Law of Delaware, or (iv) for any
transaction from which the director derived an improper personal benefit.

      The Delaware Corporation Law provides further that the indemnification
permitted thereunder shall not be deemed exclusive of any other rights to which
the directors and officers may be entitled under the corporation's by-laws, any
agreement, vote of shareholders or otherwise.

      Article Ten of the Company's Certificate of Incorporation eliminates the
personal liability of directors to the fullest extent permitted by Section 145
of the Delaware Corporation Law.

      The effect of the foregoing is to require the Company to indemnify the
officers and directors of the Company for any claim arising against such persons
in their official capacities if such person acted in good faith and in a manner
that he reasonably believed to be in or not opposed to the best interests of the
corporation, and, with respect to any criminal action or proceeding, had no
reasonable cause to believe his conduct was unlawful.

      INSOFAR AS INDEMNIFICATION FOR LIABILITIES ARISING UNDER THE SECURITIES
ACT OF 1933 MAY BE PERMITTED TO DIRECTORS, OFFICERS OR PERSONS CONTROLLING THE
COMPANY PURSUANT TO THE FOREGOING PROVISIONS, THE COMPANY HAS BEEN INFORMED THAT
IN THE OPINION OF THE SECURITIES AND EXCHANGE COMMISSION, SUCH INDEMNIFICATION
IS AGAINST PUBLIC POLICY AS EXPRESSED IN THE ACT AND IS THEREFORE UNENFORCEABLE.

ITEM 25. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

      The expenses in connection with the issuance and distribution of the
securities being registered hereby will be borne by the Company and are
estimated to be as follows:

                                      II-1

<PAGE>   82
<TABLE>
<S>                                               <C>
Registration Fee..................................$1,395.55
Legal Fees........................................20,000.00*
Accounting Fees....................................2,500.00*
     Total........................................23,895.55*
</TABLE>

- ---------------------
* Estimated

ITEM 26. RECENT SALES OF UNREGISTERED SECURITIES.

      Except for the sales pursuant to Regulation S, which were made in
compliance with Regulation S, the sales of the following securities were made in
reliance upon the exemption from the registration provisions of the Securities
Act afforded by Section 4(2) thereof and/or Regulation D promulgated thereunder,
as transactions by an issuer not involving a public offering. The purchasers of
these securities described below acquired them for their own account and not
with a view to any distribution thereof to the public. The certificates
evidencing the securities bear legends stating that the shares may not be
offered, sold or transferred other than pursuant to an effective Registration
Statement under the Securities Act, or an exemption from such registration
requirements. The Company placed stop transfer instructions with its transfer
agent with respect to all such securities.

      From October 1995 through November 1995, the Company issued 8% convertible
debentures in an aggregate principal amount of $3,685,000 to the following
persons pursuant to Regulation S under the Securities Act of 1933, as amended.
These convertible debentures were ultimately converted into 7,901,380 shares of
Common Stock.

<TABLE>
<CAPTION>

                                                      Principal Amount
Name                                             of 9% Convertible Debenture
- ----                                             ---------------------------
<S>                                                  <C>
RBB Bank AG                                          $850,000
Chumuel Lubkowski                                     200,000
Yacov Barber                                          250,000
Panshore Services, SA                                 500,000
Tula Businesses                                       500,000
International Entertainment Ventures, Ltd.             60,000
Shulamit Pritzker                                     600,000
EBC Zurich AG                                          50,000
Rafael Lapidus                                        175,000
R. Gukovitzky                                         200,000
Meritxell Ltd.                                        100,000
Yechiel Herzl                                         200,000
</TABLE>


      In November 1995, the Company received gross proceeds of $300,000 from a
private offering of its securities. The offering consisted of Units; each Unit
cost $100,000 and contained 100,000 shares of Common Stock and warrants to
purchase an additional 150,000 shares at an

                                      II-2

<PAGE>   83

exercise price of 50% of the closing bid price of the shares of Common Stock as
reported by Nasdaq on the date the holder elects to exercise his warrant. The
persons to whom the Company sold the Units are as set forth below:

<TABLE>
<CAPTION>

Name                                                Number of Units
- ----                                                ---------------
<S>                                                        <C>
Eugene Seymour                                             1
Joel Scheinbaum                                            1
Ronald Lealos                                              0.3
Brian Bramell                                              0.45
Gary Nathanson                                             0.125
George Stanton                                             0.125
</TABLE>

      In April 1996, the Company issued to Whale Securities Co., L.P. ("Whale")
warrants to purchase 1,000,000 shares of Common Stock for $1.00 per share, in
settlement of a dispute between Whale and the Company. All of such warrants have
been exercised.

      In May 1996, the Company issued 6,250 shares of Common Stock to each of
Jack Wolff and Peter Lange, in full settlement of various claims Messrs. Wolff
and Lange had against the Company.

      In March 1997, the Company sold $1,500,000 in principal amount of its 7.5%
Convertible Debentures due February 28, 1999 (the "Debentures") to The Tail Wind
Fund Ltd. Net cash proceeds to the Company were approximately $1,380,000. As of
June 30, 1997, all of the Debentures were converted to a total of 1,764,428
shares of Common Stock. In October and November 1997, the Company issued to the
holders of the Debentures an additional 363,642 shares of Common Stock upon
exercise of their rights to reset shares under the subscription agreement for
the Debentures. In January 1998, the Company issued to such holders an
additional 1,198,851 reset shares of Common Stock.

      In March 1997, the Company issued to Grayson & Associates, Inc. a
five-year warrant to purchase 89,552 shares of Common Stock for an exercise
price of $1.34 per share in consideration of certain financial consulting
services performed on behalf of the Company.

      In June and August 1997, the Company sold to certain investors a total of
4,082,905 shares of its Common Stock for an aggregate purchase price of
$2,260,000. Net cash proceeds to the Company were $2,063,000. The persons to
whom the shares were sold are as set forth below.

<TABLE>
<CAPTION>

                                            Number of Shares
Name                                        of Common Stock
- ----                                        ---------------
<S>                                         <C>
Mark Alt                                       100,000
Sterling E. Baker                              100,000
Linda Bidell                                   200,000
Collin Bingham Trust                            50,000
</TABLE>

                                      II-3

<PAGE>   84
<TABLE>
<S>                                        <C>
Tanner Payne Boyer Trust                        50,000
E. Paul Brodsky, CPA, IRA                       25,000
Mary L. Brodsky, IRA                            25,000
Carol Bruckner                                  75,000
Center for Aids Research and
 Training, Inc.                                100,000
The Covette Community                          100,000
Property Trust                                        
David Fitzpatrick                               50,000
David Freund                                 1,250,000
Gerald Grayson                                 200,000
Dean Greenberg                                  50,000
Harvey Katzman                                 100,000
Hollywood Pins Co. Pension Plan                200,000
Alan Lerner                                     20,000
Michael Lipkin                                 100,000
Sandy Linka                                     30,000
Kenneth J. McLachlan                           200,000
Gary Nathanson                                 100,000
Lisa Neuhof                                     25,000
Jack P. Slovak                                  50,000
Robert A. Slovak                                50,000
Stanton Law Corporation                         50,000
 Profit Sharing Plan                                  
George L. Stanton                              100,000
The Tail Wind Fund Ltd.                        412,905
Linda Trester                                   20,000
WCGMG, Inc., DBPP                              100,000
Jacob Zamstein, MD                              50,000
</TABLE>

      In August 1997, the Company issued to The Tail Wind Fund Ltd. a five-year
warrant to purchase 100,000 shares of it Common Stock for an exercise price of
$1.00 per share in consideration of certain finder's services performed on
behalf of the Company.

      In August 1997, the Company issued to Grayson & Associates two five-year
warrants to purchase 161,600 and 33,032 shares of Common Stock for an exercise
price of $0.50 and $0.72656 per share, respectively, in consideration of certain
financial consulting services performed on behalf of the Company.

      In December 1997, the Company issued to David Freund 1,035,714 shares of
Common Stock upon exercise of his right to additional reset shares under the
subscription agreement for his August 1997 private placement investment.

      In January 1998, the Company sold to Biscount Overseas Limited 1,500
shares of its Series 1998-A Convertible Preferred Stock, stated value $1,000 per
share, for an aggregate purchase price of $1,500,000. Net cash proceeds to the
Company were $1,380,000.

                                      II-4

<PAGE>   85

      In April 1998, the Company issued to The Tail Wind Fund Ltd. 1,496,630
shares of Common Stock upon exercise of its right to additional reset shares
under the subscription agreement for its June 1997 purchase of Common Stock.

ITEM 27.  EXHIBITS.
<TABLE>
<CAPTION>

Exhibit     Description
- -------     -----------
  <S>      <C>
  3.1      Certificate of Incorporation, as amended, incorporated by
           reference to Exhibits 2.1 through 2.6 of the Company's
           Registration Statement No. 33-46648 filed on Form S-1 (the "Form
           S-1"); and to Exhibit 2.7 of the Company's Annual Report on Form
           10-KSB for its fiscal year ended December 31, 1995
  3.2      Certificate of Amendment, dated February 25, 1997, incorporated
           by reference to Exhibit 2.2 of the Company's Annual Report on
           Form 10-KSB for its fiscal year ended December 31, 1996
  3.3      Certificate of Amendment, dated November 21, 1997, incorporated
           by reference to Exhibit 3.3 of the Company's Annual Report on
           Form 10-KSB for its fiscal year ended December 31, 1997 (the
           "1997 10-KSB")
  3.4      Company's By-laws, as amended, incorporated by reference to
           Exhibit 3.4 of the 1997 10-KSB
  4.1      Specimen of Certificate Representing Common Stock, incorporated
           by reference to Exhibit 4.1 to the Company's Registration
           Statement on Form S-1 (Registration No. 33-46648)
  4.2      Form of Underwriter's Warrant, incorporated by reference to
           Exhibit 4.2 of the Form S-1
  4.3      7.5% Convertible Debenture due February 28, 1999, issued by the
           Company to The Tail Wind Fund, Ltd. on March 11, 1997,
           incorporated by reference to Exhibit 4 to the Company's
           Quarterly Report on Form 10-QSB for its fiscal quarter ended
           March 31, 1997
  4.4      Common Stock Purchase Warrant for 89,552 shares, issued by the
           Company to Grayson & Associates on March 14, 1997, incorporated
           by reference to Exhibit 4.3 of the Company's Registration
           Statement on Form SB-2 (Registration No. 333-26795)
  4.5      Letter Agreement dated May 28, 1997 between the Company and The
           Tail Wind Fund Ltd., incorporated by reference to Exhibit 4.9 to
           the Company's Current Report on Form 8-K dated June 5, 1997
           (File No. 000-21284) (the "June 1997 8-K")
  4.6      Letter Agreement dated June 27, 1997 between the Company and The
           Tail Wind Fund Ltd., incorporated by reference to Exhibit 4.10
           to the June 1997 8-K
  4.7      Common Stock Subscription Agreement dated as of June 30, 1997 by
           and between the Company and The Tail Wind Fund Ltd.,
           incorporated by reference to Exhibit 4.2 of the June 1997 8-K
  4.8      Common Stock Subscription Agreement dated as of June 30, 1997 by
           and between the Company and the investors set forth on Schedule
           A thereto,
</TABLE>
                                      II-5

<PAGE>   86
<TABLE>
  <S>      <C>
           incorporated by reference to Exhibit 4.3 of the June 4.8 1997 8-K
  4.9      Registration Rights Agreement dated as of June 30, 1997 between the
           Company and The Tail Wind Fund Ltd., incorporated by
           reference to Exhibit 4.4 of the June 1997 8-K
  4.10     Form of Registration Rights Agreement dated as of June 30, 1997
           between the Company and the investors set forth on Schedule A to
           the Common Stock Subscription Agreement dated as of June 30,
           1997 by and between the Company and the investors set forth on
           Schedule A thereto, incorporated by reference to Exhibit 4.5 of
           the June 1997 8-K
  4.11     Form of Warrant issued to each of Grayson & Associates, Inc. and
           The Tail Wind Fund Ltd., incorporated by reference to Exhibit
           4.1 of the June 1997 8-K
  4.12     Common Stock Subscription Agreement dated as of August 22, 1997
           by and between the Company and David Freund, incorporated by
           reference to Exhibit 10.5 of Amendment No. 1 to  the Company's
           Registration Statement on Form S-3 dated September 26, 1997
           (Registration No. 333-33429) (the "S-3/A")
  4.13     Registration Rights Agreement dated as of August 22, 1997
           between the Company and David Freund, incorporated by reference
           to Exhibit  10.6 of the S-3/A
  4.14     Certificate of Designations, Rights and Preferences of the
           Series 1998-A Convertible Preferred Stock, incorporated by
           reference to Exhibit 4.1 of the Company's Current Report on Form
           8-K, dated January 26, 1998
  4.15     Warrant dated as of January 26, 1998 issued to Biscount Overseas
           Limited, incorporated by reference to Exhibit 4.3 of the
           Company's Registration Statement on Form S-3 dated February 26,
           1998 (Registration No. 333-46961) (the "1998 S-3")
  5        Opinion of Bryan Cave LLP *
  10.1     Consulting Agreement, dated May 20, 1996, between the Company
           and International Business Consultants Limited, incorporated by
           reference to Exhibit 10.1 to the Company's Annual Report on Form
           10-KSB for its fiscal year ended December 31, 1996 (the "1996
           10-KSB")
  10.2     Consulting Agreement, dated January 27, 1994, between the
           Company and Duke Van Kalken, incorporated by reference to
           Exhibit 10.16 of the Company's Annual Report on Form 10-KSB for
           its fiscal year ended December 31, 1993 (the "1993 10-KSB")
  10.3     Employment Agreement, dated August 9, 1994, between the Company
           and David Barnes, incorporated by reference to Exhibit 10.3 to
           the 1996 10-KSB. #
  10.4     1992 Stock Option Plan, incorporated by reference to Exhibit
           10.1 of the Form S-1
  10.5     1994 Stock Option Plan, incorporated by reference to Exhibit A
           of the Proxy Statement for the Company's 1994 Annual Meeting
  10.6     Lease Agreement, dated June 13, 1994, between Technology Parks
           Private Limited and Saliva Diagnostic Systems (Singapore) Pte.
           Ltd., incorporated by reference to Exhibit 10.2 of the 1995
           10-KSB
  10.7     Amendment, dated February 20, 1997, to Lease Agreement, dated
           June 13,
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                                      II-6

<PAGE>   87
<TABLE>
  <S>      <C>
           1994, between Technology Parks Private Limited and Saliva Diagnostic
           Systems (Singapore) Pte. Ltd., incorporated by
           reference to Exhibit 10.7 to the 1996 10-KSB
  10.8     Lease Agreement between the Company and East Ridge Business
           Park, incorporated by reference to Exhibit 10.14 of the Form S-1
  10.9     Lease Agreement for additional premises between the Company and
           East Ridge Business Park, incorporated by reference to Exhibit
           10.14 of the Form S-1
  10.10    Amendment, dated June 14, 1996, to Lease Agreement between the
           Company and East Ridge Business Park, incorporated by reference
           to Exhibit 10.10 to the 1996 10-KSB
  10.11    License Agreement, dated march 22, 1994, between the Company and
           Orgenics, Ltd., incorporated by reference to Exhibit 10.7 of the
           1993 10-KSB
  10.12    License Agreement between Saliva Diagnostic Systems, Inc. and
           Saliva Diagnostic Systems (Singapore) Pte. Ltd., incorporated by
           reference to Exhibit 10.10 to the Company's Annual Report on
           Form 10-KSB for its fiscal year ended December 31, 1994 (the
           "1994 10-KSB")
  10.13    Securities Purchase Agreement dated as of January 26, 1998
           between the Company and Biscount Overseas Limited, incorporated
           by reference to Exhibit 10.1 of the Company's Current Report on
           Form 8-K, dated January 26, 1998 (the "January 8-K")
  10.14    Registration Rights Agreement dated as of January 26, 1998
           between the Company and Biscount Overseas Limited, incorporated
           by reference to Exhibit 10.2 of the Company's January 8-K
  10.15    Placement Agent Agreement dated as of January 26, 1998 between
           the Company and Aryeh Trading, Inc. incorporated by reference to
           Exhibit 10.3 of the January 8-K
  10.16    Consulting Agreement, dated December 5, 1997, between the
           Company and International Business Consultants Limited,
           incorporated by reference to Exhibit 10.16 of the 1997 10-KSB
  10.17    Sub-License Agreement by and among Saliva Diagnostic Systems,
           Pte. Ltd., Saliva Diagnostic Systems, Inc. Fremont Novo
           Sciences, L.L.C. and the Company dated February 21, 1995,
           incorporated by reference to Exhibit 10.17 of the 1997 10-KSB
  10.18    Amendment to Sub-License Agreement, dated March 8, 1995,
           incorporated by reference to Exhibit 10.18 of the 1997 10-KSB
  10.19    Agreement between Unilever PLC and the Company dated December
           15, 1997, incorporated by reference to Exhibit 10.19 of the 1997
           10-KSB
  21       List of Significant Subsidiaries, incorporated by reference to
           Exhibit 21.1 of the Form S-1
  23.1     Consent of Hollander, Gilbert & Co.*
  23.2     Consent of Arthur Andersen LLP*
  23.3     Consent of Bryan Cave LLP (included in Exhibit 5)
  24       Powers of Attorney (included at signature page to this
           registration statement)
</TABLE>

* To be filed by amendment

                                      II-7
<PAGE>   88

ITEM 28. UNDERTAKINGS

      (a) Insofar as indemnification for liabilities arising under the
Securities Act of 1933, may be permitted to directors, officers and controlling
persons of the Company pursuant to the foregoing provisions or otherwise, the
Company has been advised that, in the opinion of the Securities and Exchange
Commission, such indemnification is against public policy as expressed in the
Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the Company
of expenses incurred or paid by a director, officer or controlling person of the
Company in the successful defense of any action, suit or proceeding) is asserted
by such director, officer or controlling person in connection with the
securities being registered, the Company will, unless in the opinion of its
counsel the matter has been settled by controlling precedent, submit to a court
of appropriate jurisdiction the question of whether such indemnification by it
is against public policy as expressed in the Act and will be governed by the
final adjudication of such issue.

      (b) The Company hereby undertakes:

      (1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement to:

      (i) include any prospectus required by Section 10 (a)(3) of the Securities
Act;

      (ii) reflect in the prospectus any facts or events arising after the
effective date of this Registration Statement (or the most recent post-effective
amendment thereof) which, individually or in the aggregate, represent a
fundamental change in the information set forth in this Registration Statement;

      (iii) include any material information with respect to the plan of
distribution not previously disclosed in this Registration Statement or any
material change to such information in this Registration Statement.

      (2) That, for the purpose of determining any liability under the
Securities Act, each such post-effective amendment shall be deemed to be a new
Registration Statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

      (3) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of the
offering.

      (4) For purposes of determining any liability under the Securities Act,
the information omitted from the form of Prospectus filed as part of a
Registration Statement in reliance upon Rule 430A and contained in the form of
Prospectus filed by Registrant pursuant to Rule 424

                                      II-8

<PAGE>   89

(b)(1) or (4) under the Securities Act shall be deemed to be part of the
Registration Statement as of the time it was declared effective.

      (5) For the purpose of determining any liability under the Securities Act,
each post-effective amendment that contains a form of Prospectus shall be deemed
to be a new Registration Statement relating to the securities offered therein,
and the offering of such securities at that time shall be deemed to be the
initial bona fide offering thereof.

                                      II-9
<PAGE>   90



                                   SIGNATURES

      Pursuant to the requirements of the Securities Act of 1933, as amended,
the registrant certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form SB-2 and has duly caused this
Registration Statement on Form SB-2 to be signed on its behalf by the 
undersigned, thereunto duly authorized, in the City of Vancouver, State of 
Washington, on May 26, 1998.

                                    SALIVA DIAGNOSTIC SYSTEMS, INC.


                                    By: /s/ Kenneth J. McLachlan
                                       -------------------------
                                    Kenneth J. McLachlan
                                    President and Chief Executive Officer

     Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement on Form SB-2 has been signed below by the following
persons in the capacities and on the dates indicated. Each of such persons
appoints Kenneth J. McLachlan and Eric F. Stoer or each of them with full power
to act without the other, his true and lawful attorneys-in-fact and agents of
him and on his behalf and in his name, place and stead, and in any and all
capacities, with full and several power of substitution, to sign and file with
the proper authorities any and all documents in connection with this
Registration Statement on Form SB-2, granting unto said attorneys, and each of
them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises in order to
effectuate the same as fully to all intents and purposes as he might or could
do if personally present, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or any of them, may lawfully do or cause to be
done by virtue hereof.

<TABLE>
<CAPTION>

            SIGNATURE                                         TITLE                                     DATE


<S>                                          <C>                                                    <C>
                                             Director, President, Chief Executive                   May 26, 1998
/s/ Kenneth J. McLanchlan                    Officer, Chief Financial Officer and
- ---------------------------                  Chief Accounting Officer
Kenneth J. McLachlan                                                 



/s/ Eric F. Stoer                            Director                                               May 26, 1998
- ---------------------------
Eric F. Stoer


/s/ Hans Vauthier                            Director                                               May 26, 1998
- ---------------------------
Hans Vauthier




                                             Chief Operating Officer and
/s/ Paul D. Slowey                           Vice President of Marketing                            May 26, 1998
- ---------------------------
Paul D. Slowey




</TABLE>


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