Contamination of Listeria monocytogenes in Ready-to-Eat Seafoods in Japan

Abstract

A total of 394 samples of fresh seafoods and ready-to-eat seafoods were collected from supermarkets in Tokyo, Kanagawa and Chiba for the study of Listeria spp. and Listeria monocytogenes contamination. Listeria spp. and L. monocytogenes were isolated from 10.2% and 5.8% samples, respectively. Most of the L. monocytogenes positive samples were ready-to in smoked salmon (4.3cfu/g) and boiled octopus (1.5cfu/g). The predominant serotype of L. monocytogenes was 1/2a, followed by 3a and 4b.