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                                                                    Exhibit 23.2

   
              Consent of Independent Certified Public Accountants


We have issued our report dated March 20, 1996 accompanying the consolidated
financial statements of National Diagnostics, Inc. and Subsidiaries for the
year ended December 31, 1995 which is contained in the Registration Statement
and Prospectus.  We consent to the use in the Registration Statement and
Prospectus of the aforementioned report and to the use of our name as it
appears under this caption "Experts."
    



                                                            GRANT THORNTON LLP

   
Tampa, Florida
July 1, 1996