Quality audit data collected as part of a mass feeding quality assurance program were analyzed to determine the relationships between the indicator tests (total aerobic plate count, coliform count and Escherichiu colz) and the common food-borne pathogens (Staphylococcus aureus, Clostridium perfringens and Salmonella). 132 raw foods and 593 readyto-eat foods were evaluated. The indicators were grouped into ranges and compared to the pathogens and to each other in terms of detectability. There were correlations between the pathogens and the indicator ranges and between the indicators and the indicator ranges. The value of the indicators in the e'valuation of food safety was tested by setting standards and determining the numbers of correct and incorrect decisions which would be made relative to the pathogens detected in the foods. None of the indicators was suitable as a screening agent for food safety.

The sanitation surveillance system was developed with standards and follow-up actions as a part of an assurance program for microbiological safety in a university feeding system. The surveillance is based upon an adhesive contact and transfer tape system for surface monitoring and a micropore filter system for monitoring efficiency of the associated laundry operation. Results compiled from 3 years of operation generally show continued reductions in numbers of items testing below fully satisfactory. Specific systems of microbiological data analysis for detection of some mechanical or procedural breakdowns were developed. The overall cost for the entire laboratory part of the food safety assurance program was less than 0.5 cent per meal served.

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