蒙古牦牛和奶牛生鲜乳中肠毒素性金黄色葡萄球菌的存在情况。
Occurrence of enterotoxic Staphylococcus aureus in raw milk from yaks and cattle in Mongolia.
作者信息
Tsegmed Uranchimeg, Normanno Giovanni, Pringle Marit, Krovacek Karel
机构信息
Department of Biomedical Sciences and Veterinary Public Health, Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural Sciences, Box 7036, 750 07 Uppsala, Sweden.
出版信息
J Food Prot. 2007 Jul;70(7):1726-9. doi: 10.4315/0362-028x-70.7.1726.
Staphylococcal food poisoning is considered one of the leading foodborne illnesses in humans worldwide and is associated with contaminated foods of animal origin, such as milk and dairy products. In this study, we investigated the occurrence of staphylococci and the enterotoxigenic properties of Staphylococcus aureus isolated from raw milk from yaks (Bos mutus) and cattle in Mongolia. Staphylococci were isolated from 72 (74%) of the 97 raw milk samples. Of the samples containing staphylococci, 69% (50 of 72) were from yaks and 30.5% (22 of 72) were from cattle. S. aureus was detected in 10% of yak (7 of 72) and 21% of cattle (15 of 72) milk samples. Staphylococcal enterotoxin C was detected in 23% (5 of 22) of the S. aureus strains investigated, based on the reverse passive latex agglutination technique. Three of the five enterotoxigenic strains were from yaks and two were from cattle. None of the S. aureus strains tested produced staphylococcal enterotoxins A, B, or D. To our knowledge, this is the first report of the occurrence of staphylococci and enterotoxigenic S. aureus in milk from yaks and cattle in Mongolia.
葡萄球菌食物中毒被认为是全球人类主要的食源性疾病之一，且与动物源性污染食品有关，如牛奶和乳制品。在本研究中，我们调查了从蒙古牦牛（牦牛属）和牛的生牛奶中分离出的葡萄球菌的发生率以及金黄色葡萄球菌的产肠毒素特性。从97份生牛奶样本中的72份（74%）中分离出了葡萄球菌。在含有葡萄球菌的样本中，69%（72份中的50份）来自牦牛，30.5%（72份中的22份）来自牛。在10%的牦牛（72份中的7份）和21%的牛（72份中的15份）牛奶样本中检测到了金黄色葡萄球菌。基于反向被动乳胶凝集技术，在所调查的金黄色葡萄球菌菌株中，23%（22份中的5份）检测到了葡萄球菌肠毒素C。五株产肠毒素菌株中有三株来自牦牛，两株来自牛。所检测的金黄色葡萄球菌菌株均未产生葡萄球菌肠毒素A、B或D。据我们所知，这是蒙古牦牛和牛的牛奶中葡萄球菌和产肠毒素金黄色葡萄球菌发生情况的首次报告。
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