Prevalence of Enterotoxin Genes in Staphylococcus aureus Isolates from Pork Production

文献类型： 外文期刊

第一作者： Zhang, Yang

作者： Zhang, Yang;Wang, Yage;Yan, He;Cai, Rujian;Li, Chunling;Shi, Lei;Shi, Lei;Yan, He

作者机构：

关键词： Staphylococcal enterotoxins; enterotoxin gene cluster; foodborne poisoning; pork production

期刊名称：FOODBORNE PATHOGENS AND DISEASE （ 影响因子：3.171； 五年影响因子：3.235 ）

ISSN： 1535-3141

年卷期： 2018 年 15 卷 7 期

页码：

收录情况： SCI

摘要： In this study, 130 Staphylococcus aureus isolates from samples associated with pork production were tested for prevalence of 18 staphylococcal enterotoxin (SE) genes. Approximately 94.6% (123/130) of isolates from different stages of pork production harbored one or more SE genes forming 37 different enterotoxin gene profiles. Seb was present in 60.0% of the S. aureus isolates, the highest among the genes tested. The genes, sed, sej, seo, sep, ser, and seu, were not found. The five classical SE genes (including sea, seb, sec, sed, see) had lower prevalence than the egc gene cluster (seg, sei, sem, sen, seo, or seu). Notably, approximate to 6.9% (9/130) isolates harbored five SE genes. Classical SE genes were relatively higher in raw meat isolates than swine farm isolates, suggesting that raw meat isolates have a greater potential for classical staphylococcal food poisoning. Incomplete egc clusters were mainly distributed in swine farm isolates, and some of them coexisted with other classical SE genes (seb, sec), showing that swine farms could be potential sources of enterogenic S. aureus of food safety concern. Characterizing the distributions of enterotoxin genes among S. aureus may provide epidemiological information for the benefit of public health and food safety.

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