I am definitely a Vitek person. See my web site for Vitek validation protocol information. Davin C. Enigl, MS-MEAS President-Microbiologist Hazard Analysis and Critical Control Point Validations for the Food, Cosmetic and Pharmaceutical Industry HACCP Validations (sm) enigl at aol.com http://members.aol.com/enigl/index.html January 12, 1997 8:09 pm