Risk of Listeria monocytogenes Contamination of Raw Ready-To-Eat Seafood Products Available at Retail Outlets in Japan

Applied and Environmental Microbiology - Tập 76 Số 10 - Trang 3383-3386 - 2010
Satoko Miya1, Hajime Takahashi1, Tatsuya Ishikawa1, Tateo Fujii1, Bon Kimura1
1Department of Food Science and Technology, Faculty of Marine Science, Tokyo University of Marine Science and Technology, Tokyo 108-8477, Japan

Tóm tắt

ABSTRACT Examination of Listeria monocytogenes prevalence among ready-to-eat foods in Japan revealed frequent (5.7 to 12.1%) contamination of minced tuna and fish roe products, and the isolates had the same virulence levels as clinical isolates in terms of invasion efficiency and infectivity in cell cultures and a murine infection model, respectively. Premature stop codons in inlA were infrequent (1 out of 39 isolates). Cell numbers of L. monocytogenes in minced tuna and salmon roe increased rapidly under inappropriate storage temperatures (from a most probable number [MPN] of 10 0 to 10 1 /g to an MPN of 10 3 to 10 4 /g over the course of 2 days at 10°C). Thus, regulatory guidelines are needed for acceptable levels of L. monocytogenes in these foods.

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Thông tin xuất bản

Applied and Environmental Microbiology

Tập 76 Số 10

3383-3386

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