Abbott Laboratories
                                 100 Abbott Park Road
                                Abbott Park, Illinois

                                             March 13, 1998

          ________________________
          ________________________
          ________________________

          Ladies and Gentlemen:

               This letter is to confirm our agreement regarding all of the
          ___________ common shares, without par value, (the "Shares") of
          International Murex Technologies Corporation, a British Columbia
          corporation (the "Company") held by you.  In order to induce
          Abbott Laboratories, an Illinois corporation ("Buyer") to enter
          into an Acquisition Agreement, to be dated as of the date hereof
          between the Company and Buyer (the "Acquisition Agreement"), you
          hereby agree as follows:

               Subject to the terms and conditions hereof,  on or prior to
          the expiration date of the tender offer to be commenced by Buyer
          pursuant to the Acquisition Agreement (the "Tender Offer"), you
          will tender to Buyer, or cause to be tendered, all of the Shares,
          regardless of whether a higher offer for such Shares has been
          made.  If you withdraw your tender of Shares in the Tender Offer,
          you shall immediately, but in no event later than the expiration
          date of the Tender Offer re-tender such Shares to Buyer.

               You hereby grant to Buyer the option (the "Option") to
          purchase any or all the Shares, at a price of at least $13.00 per
          Share, until the date (the "Expiration Date") that is: (i) the
          date the Acquisition Agreement is terminated in accordance with
          its terms, unless such termination is an Applicable Termination
          (as defined below), in which case the Option shall continue as
          provided in the following clause (ii); or (ii) after an
          Applicable Termination, the date that is the later of (A) five
          business days following an Applicable Termination and (B) two
          business days following the receipt by Buyer of any of the
          governmental consents or approvals or the termination or
          expiration of any waiting periods referred to in Section
          4.4(b)(ii), (iii), (iv) and (v) of the Acquisition Agreement;
          provided, however, in no event shall the Option be exercisable
          --------  -------
          after August 31, 1998.  An "Applicable Termination" shall mean
          any termination of the Acquisition Agreement pursuant to Sections
          8.1(d), 8.1(e) or  8.1(f) thereof.

               You hereby agree not to sell, transfer or encumber the
          Shares (except in the Tender Offer or to Buyer) during the term
          of this letter agreement.

               You hereby represent and warrant as to the Shares that (i)
          you are the sole owner of and have full right, power and
          authority to sell and vote the Shares, or if you are not the sole
          owner, you have the full right, power and authority to sell the
          Shares, and in either event, this letter agreement is a valid and
          binding agreement, enforceable against you, in accordance with
          its terms; (ii) neither the execution of this letter agreement
          nor the consummation by you of the transactions contemplated
          hereby will constitute a violation of, or conflict with, or
          default under, any contract, commitment, agreement,
          understanding, arrangement or restriction of any kind to which
          you are a party or by which you or the Shares are bound; and
          (iii) Buyer or its subsidiary shall upon purchase of the Shares
          receive good and marketable title to the Shares, free and clear
          of all liens, claims, encumbrances and security interests of any
          kind.

               Buyer hereby represents and warrants that it has the
          corporate power and it is duly authorized to enter into this
          letter agreement.

               You hereby agree to vote all of the Shares, and any other
          common shares of the Company which you may own, or have the power
          to vote, (i) in the manner directed by Buyer with respect to  any
          matters related to the acquisition of the Company by Buyer and
          (ii) against any other amalgamations, mergers, recapitalizations,
          business combinations, sales of assets, liquidations or similar
          transactions involving the Company, or any other matters which
          would be inconsistent with Buyer s intended acquisition of the
          Company.  In furtherance of your voting agreement in this
          paragraph, you hereby revoke any and all previous proxies with
          respect to any of the Shares and grants to Buyer and such
          individuals or corporations as Buyer may designate an irrevocable
          proxy to vote all of the Shares owned by you in accordance with
          this paragraph on any matters which may be presented to
          shareholders of the Company with respect to  any matters related
          to the acquisition of the Company by Buyer or any other
          amalgamations, mergers, recapitalizations, business combinations,
          sales of assets, liquidations or similar transactions involving
          the Company, or any other matters which would be inconsistent
          with Buyer s proposed acquisition of the Company.  In addition,
          you hereby agree to execute such additional documents as Buyer
          may reasonably request to effectuate its voting rights under this
          paragraph.

               We each hereby agree that this letter agreement creates
          legally binding commitments, enforceable in accordance with their
          terms.    This letter agreement and the Acquisition Agreement (i)
          constitute the entire agreement among the parties hereto with
          respect to the subject matter hereof and (ii) supersede all other
          prior agreements and understandings, both written and oral,
          between the parties with respect to the subject matter hereof. 
          This Agreement is not intended to confer upon any other person
          any rights or remedies hereunder.

               This letter agreement may be terminated at any time (i) by
          mutual written consent of the parties hereto or  (ii) by either
          party on or after the Expiration Date.  Notwithstanding the
          foregoing, such right of termination shall not be available to
          any party whose breach of any obligation hereunder has been the
          cause of or resulted in the failure of the transactions
          contemplated hereunder to be consummated.  No such termination
          shall relieve any party from liability for any breach of this
          letter agreement. 

               Each party shall be entitled, without prejudice to the
          rights and remedies otherwise available to such party, to
          specific performance of all of the other party's obligations
          hereunder. This Agreement shall be governed by and construed in
          accordance with the internal laws (and not the law of conflicts)
          of the State of Illinois.  Each of the parties shall pay its own
          expenses in connection with the execution and performance of this
          letter agreement.

               If any term, provision, covenant or restriction of this
          letter agreement is held by a court of competent jurisdiction to
          be invalid, void or unenforceable, the remainder of the terms,
          provisions, covenants and restrictions of this letter agreement
          shall remain in full force and effect and shall in no way be
          affected, impaired or invalidated.

               Please indicate your agreement to the foregoing by signing
          this letter agreement in the space provided below, whereupon a
          binding agreement will have been formed between us in respect of
          the foregoing.

                                   Sincerely,

                                   ABBOTT LABORATORIES


                                   By:_____________________
                                   Name:
                                   Title:

          Acknowledged and agreed:

          __________________________


          By:_______________________
          Name:
          Title: