INTERNATIONAL MUREX TECHNOLOGIES CORPORATION COMPUTATIONS OF EARNINGS PER SHARE (1) THREE MONTHS ENDED MARCH 31, ------------------------------- 1997 1996 -------- -------- PRIMARY Weighted average shares outstanding during the period 16,385 16,160 Shares issuable upon assumed exercise of stock options and warrants, less amounts assumed repurchased under the treasury stock method(2) 946 ------- ------- Total common shares and common share equivalents 17,331 16,160 ======= ======= Net income (loss) $1,659 ($1,109) ======= ======= Primary per share amount $0.10 ($0.07) ======= ======= FULLY DILUTED(3) Total common shares and common share equivalents 17,331 16,160 Additional shares issuable upon assumed exercise of stock options and warrants, less amounts assumed repurchased under the treasury stock method(2) ------- ------- Total 17,331 16,160 ======= ======= Net income (loss) $1,659 ($1,109) ======= ======= Fully diluted per share amount $0.10 ($0.07) ======= ======= (1) Weighted average share and dollar amounts, except per share amounts, are stated in thousands. (2) Shares issued from assumed exercise of options and warrants include the number of incremental shares which result from applying the "treasury stock method" for options and warrants, APB Opinion No. 15, paragraph 36. The options and warrants are antidilutive in 1996 and are not included in the calculation. (3) This calculation is submitted in accordance with 17 CPR 229.601(b)(11) although not required by APB Opinion No. 15 because it results in dilution of less than 3%.