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首页> 外文期刊>Food Control >Metagenomic analysis of the fecal microbiomes from Escherichia coli O157:H7-shedding and non-shedding cows on a single dairy farm
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Metagenomic analysis of the fecal microbiomes from Escherichia coli O157:H7-shedding and non-shedding cows on a single dairy farm

机译：大肠杆菌O157中粪便微生物谱分析粪便微生物瘤：H7脱落和单个乳房农场的非脱落奶牛

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摘要

Escherichia coli O157:H7 (O157:H7) is a major zoonotic pathogen responsible for severe and sometimes fatal infections in humans. Cattle are the primary reservoir of O157:H7, although other animal species are also known carriers. Fecal shedding of this pathogen can potentially lead to contamination of pre-pasteurized milk, meat, water, produce, wildlife, and the environment. Understanding the relationships between O157:H7 carriage and the structure of the ruminant intestinal microbiome may inform development of mitigation strategies. To assess the compositional differences in the fecal microbiota of O157:H7-shedding and non-shedding cows, 14 fecal samples from lactating cows in the same dairy herd were analyzed using shotgun metagenomic sequencing. Results indicated that the microbial community, resistome, and virulome structures did not differ based on shedding status, but several unique taxa were identified in the fecal metagenomes in at-least 50% of the samples from the O157:H7-shedding cows. Further, differential relative abundance of 20 taxa belonging to the phyla Firmicutes, Bacteroidetes, Actinobacteria, Proteobacteria, Spirochaetes, Cyanobacteria, and Verrucomicrobia, were observed in the fecal samples between the two groups. The results of this study indicate that subtle differences in the fecal metagenomes of lactating dairy cows may be associated with E. coli O157:H7 shedding.
机译：大肠杆菌O157：H7（O157：H7）是一种主要的人畜共患病原体，有时是人类的严重和有时致命感染。牛是O157：H7的主要储层，但其他动物物种也是已知的载体。这种病原体的粪便脱落可能导致预杀菌牛奶，肉类，水，生产，野生动物和环境的污染。了解O157：H7托架与反刍动物肠道微生物组结构之间的关系，可能会提供缓解策略的发展。为了评估O157的粪便微生物群的组成差异：H7脱落和非脱落奶牛，使用霰弹枪代理测序分析来自同一乳制牛群中的哺乳牛奶的14个粪便样品。结果表明，微生物群落，抵抗力和毒细胞体结构基于脱落状态没有不同，但在从O157：H7-Shedding奶牛的至少50％的样品中鉴定了几种独特的分类群。此外，在两组之间的粪便样品中观察到属于植物体积，菌株，肌动菌，植物，螺旋体，肌菌，螺旋体，肌菌，螺旋体，蓝菌和疣状病症的差异相对丰度。该研究的结果表明，哺乳乳奶牛的粪便群体的细微差异可能与大肠杆菌O157：H7脱落有关。

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