Archiving of Food Samples from Restaurants and Caterers—Quantitative Profiling of Outbreaks of Foodborne Salmonellosis in Japan
Abstract:The Ministry of Health, Labor and Welfare (former MHW) of Japan issued a Directive in 1997 advising restaurants and caterers to freeze portions of both raw food and cooked dishes for at least 2 weeks. This system has been useful for determining vehicle foods at outbreaks. Enumeration of bacteria in samples of stored food provide data about pathogen concentrations in the implicated food. Data on Salmonella concentrations in vehicle foods associated with salmonellosis outbreaks were collected in Japan between 1989 and 1998. The 39 outbreaks that occurred during this period were categorized by the settings where the outbreaks took place, and epidemiological data from each outbreak were summarized. Characteristics of outbreak groups were analyzed and compared. The effect of new food-storage system on determination of bacterial concentration was evaluated. Freezing and nonfreezing conditions prior to microbial examination were compared in the dose-response relationship. Data from outbreaks in which implicated foods had been kept frozen suggested apparent correlation between the Salmonella dose ingested and the disease rate. Combined with results of epidemiological investigation, quantitative data from the ingested pathogen could provide complete dose-response data sets.
Document Type: Research Article
Affiliations: 1: Division of Biomedical Food Research, National Institute of Health Sciences, Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan 2: Department of Infectious Diseases, Nagano Research Institute for Health and Pollution, Nagano, Nagano 380-0944, Japan 3: Department of Veterinary Public Health, National Institute of Public Health, Shirokanedai, Minato-ku, Tokyo 108-8638, Japan 4: Food Safety Programme, World Health Organization, 20 Avenue Appia, Ch-1211 Geneva 27, Switzerland 5: Ministry of Health, Labour and Welfare, Kasumigaseki, Chiyoda-ku, Tokyo 100-8916, Japan 6: Department of Veterinary Public Health, University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
Publication date: 2004-09-01
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