Pathogene und toxigene Bakterien in Milchprodukten - Untersuchungen der kantonalen Laboratorien 1990-1997

摘要

In order to collect data on the microbiological quality of consumer milk products the results of food analyses by the official food control authorities, documented in the annual reports of the Swiss state laboratories from 1990 to 1997, were evaluated. Over that period L. monocytogenes was responsible for the most frequent violations of the legal limits in milk products (4.4%), followed by 5. aureus and B. cereus (both 0.8%), P. aeruginosa (0.6%), and Salmonella (0.4%). Campylobac-ter and Y. enterocolytica never violated the limit values. VTEC-E. coli were never detected. In general milk products can be regarded as safe. Cheese manufactured in the Alps from ewe's or sheep's milk contained unacceptable levels of S. aureus. Despite the fact that the sampling method of the state laboratories may only give a partial picture of the situation, the data from this evaluation will help assess more precisely the possible risk of pathogenic bacteria in milk products for consumers.