Affiliation:
1. Department of Food Science and Industries, University of Minnesota, St. Paul 55101
Abstract
Eight plants that were equipped with several types of driers and that produced a variety of dried milk products were surveyed for Salmonella contamination. Each plant had a history of Salmonella isolations from finished product. Sampling included production fractions as well as tailings and environmentals. Distribution of salmonellae was not random in fractions of product obtained during a day's operation. One-fourth of the 277 samples of the first product through the system (animal feed) contained salmonellae; this was a higher frequency than the 5.6% positive tests observed in 963 samples of other fractions produced later during daily operation. The incidence of Salmonella isolations in these food-grade products also was lower than that observed in 873 tailings samples (10.5%), in 1125 air filter samples (23.6%), and in 763 environmental samples (21.1%). However, plants with Salmonella-positive air filters or environmentals were able, on occasion, to manufacture product free of salmonellae. Results of this study indicated that the first product out of the system during daily operation provides the best sample for evaluation of product contamination by salmonellae.
Publisher
International Association for Food Protection
Cited by
18 articles.
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5. Identification, assessment and management of food-qrelated microbiological hazards: historical, fundamental and psycho-social essentials1Presented, in part, to the First International Eijkman Post-graduate Course in Food Safety at the University of Wisconsin, River Falls, USA, 26th May 1995; the AIFST Regional Meeting, Sydney, 12th October 1995; the Veterinary Public Health Course at Zagreb, Croatia, 6th March 1996; the Microbiological Food Safety Seminar, Taipei, Taiwan, 11th June 1996; the Mercosur Food Protection Conference, Buenos Aires, Argentina, 28th November 1996; the Food Microbiology and Safety in International Perspective Course, University of Wisconsin at River Falls, 4–10 June 1997; and the Regional Public Health and Preventive Medicine Conference, Bologna, 19th November 1997.1;International Journal of Food Microbiology;1998-01