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Salmonella Prevalence in Seafood Imported into Japan

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A total of 353 samples of 29 types of seafood were tested for Salmonella prevalence and total microbial population. Salmonella enterica serotype Weltevreden was isolated from 2 of 47 black tiger prawn samples. The contamination levels of Salmonella were in a range of <30 to 40 most probable number per 100 g. In addition, one sample of black tiger prawns and two samples of white shrimp were positive for Salmonella invA gene on PCR assay. Although the mean aerobic bacterial count was greater than 4 log CFU/g in most of the sample types, those in the two Salmonella-isolated samples of black tiger prawn were 7.48 and 5.18 log CFU/g, respectively. These results indicate the possibility that shrimp and prawns contribute to foodborne infections. The improvement of seafood quality is an important issue, and the information on contamination by pathogens should be provided as feedback to the originating country, with the aim of increasing safety.

Document Type: Research Article

Affiliations: 1: Department of Microbiology, Kanagawa Prefectural Institute of Public Health, 1-3-1 Simomachiya, Chigasaki 253-0087, Japan 2: Yamanashi Institute for Public Health, 1-7-31 Fujimi Kofu-shi Yamanashi Prefecture 400-0027, Japan 3: Saitama Institute of Public Health, Saitama 338-0824, Japan 4: Gunma Prefectural Institute of Public Health and Environmental Sciences, 378 Kamioki, Maebashi, Gunma 371-0052, Japan 5: Department of Microbiology, Tokyo Metropolitan Research Laboratory of Public Health, Hyakunincho 3 Chome 24-1, Shinjuku-ku, Tokyo 169-0073, Japan 6: Division of Microbiology, National Institute of Health Sciences, Setagaya-ku, Tokyo 158-8501, Japan

Publication date: July 1, 2008

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