Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala s/n, Colonia Santo Tomas, C.P. 11340, Mexico City, Mexico.
J Food Prot. 2013 Apr;76(4):694-8. doi: 10.4315/0362-028X.JFP-12-325.
Yersinia enterocolitica has been isolated from a batch of pork-derived products, from healthy and diseased animals, and from different types of milk and dairy products, among others. We studied the prevalence and diversity of Y. enterocolitica isolated from raw cow's milk collected from stables in Mexico City. Of the 1,300 samples analyzed, Y. enterocolitica was isolated in 454, with an average of 25% positive samples for each stable. Of the total isolated bacteria of the Yersinia genus, 44.25% were Y. enterocolitica, 18.28% were Y. kristensenii, 13.65% were Y. intermedia, 14.85% were Y. frederiksenii, and 9.14% were Y. aldovae. Among the different strains of Y. enterocolitica, biotype 1A was present in 70%, biotype 2 in 13.2%, biotype 3 in 8.54%, and biotype 4 in 8.15% of samples. Serotypes O:5, O:3, O:2, and O:9 were found in all biotypes identified. There were no statistically significant differences in the isolation of this bacterium with respect to the stables where they were found, although there was significant difference regarding the time of year. The data obtained in this work show the need to protect public health in Mexico against infections transmitted by raw cow's milk.
从一批猪肉制品、健康和患病动物以及不同类型的牛奶和乳制品中分离出了肠炎耶尔森菌。我们研究了从墨西哥城马厩采集的生牛乳中分离出的肠炎耶尔森菌的流行情况和多样性。在分析的 1300 个样本中，有 454 个样本分离出了肠炎耶尔森菌，每个马厩的阳性样本平均为 25%。在分离出的耶尔森氏菌属细菌中，44.25%为肠炎耶尔森菌，18.28%为克氏耶尔森菌，13.65%为中间耶尔森菌，14.85%为弗雷德里克森氏菌，9.14%为奥尔氏菌。在不同的肠炎耶尔森菌菌株中，生物型 1A 占 70%，生物型 2 占 13.2%，生物型 3 占 8.54%，生物型 4 占 8.15%。所有鉴定的生物型均存在血清型 O:5、O:3、O:2 和 O:9。虽然与一年中的时间有关，但在分离这种细菌方面，各马厩之间没有统计学上的显著差异。这项工作获得的数据表明，有必要保护墨西哥公众的健康，防止由生牛乳传播的感染。
