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                                                                    Exhibit 23.3

   
KIRKLAND, BRAKEMAN,
RUSS, MURPHY & TAPP
CERTIFIED PUBLIC ACCOUNTANTS

13577 Feather Sound Drive, Suite 400
Clearwater, FL  34622-5539
(813) 572-1400 Fax (813) 571-1933




               CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANT




We have issued our report dated February 19, 1995 accompanying the consolidated
financial statements of National Diagnostics, Inc. and Subsidiaries for the
year ended December 31, 1994 which is contained in this Registration Statement.
We consent to the use in the Registration Statement of the aforementioned
report and to the use of our name as it appears under this caption "Experts."





KIRKLAND, BRAKEMAN, RUSS, MURPHY & TAPP
Clearwater, Florida
July 1, 1996