Prevalence and contamination levels of listeriamonocytogenes in ready-to-eat foods in Tokyo, Japan

Journal of Veterinary Medical Science

Akemi KAI¹  Akihiko HIRAI¹  Yukako SHIMOJIMA¹  Kenji SADAMASU¹  Miki IDA¹  Rie FUKUI¹  Yukari NISHINO¹  Akiko NAKAMA¹  Sumiyo KURODA¹ 

[1] Department of Microbiology, Tokyo Metropolitan Institute of Public Health, 3�?24�?1 Hyakunin-cho, Shinjuku-ku, Tokyo 169�?0073, Japan

关键词: Listeria;    Listeria monocytogenes;    MPN;    ready-to-eat food;    serotype;   

DOI  :  10.1292/jvms.15-0708

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(19)We surveyed prevalence and contamination levels of Listeriamonocytogenes in ready-to-eat foods between 2000 and 2012 in Tokyo. L.monocytogenes was isolated from 52 (1.7%) out of 2,980 samples. Comparing theprevalence in the study period, 2.2% were positive in the former period (2000�?2005) and1.2% in the latter (2006�?2012). Using the most probable number (MPN) technique, 32 sampleswere contaminated with fewer than 0.3 L. monocytogenes/g, 10 samples with0.3�?1.0/g and 4 samples with more than 1.0/g (the maximum was 2.3/g). The most commonserovar was 1/2a, followed by 1/2b, 4b and 1/2c. We revealed that ready-to-eat foods inTokyo were contaminated with L. monocytogenes, although the contaminationlevels were low.

【 授权许可】

Unknown