The pathogenic potential and genetic attributes of Escherichia coli in milk from dairy cows with subclinical mastitis
文献类型： 外文期刊
作者： Li, Ke 1 ; Xu, Lina 2 ; Tian, Mengyue 1 ; Yang, Ming 1 ; Jia, Li 1 ; Zou, Dongmin 3 ; Liu, Ruonan 1 ; Du, Jinliang 1 ; Ma, Yuzhong 1 ;
作者机构： 1.Hebei Agr Univ, Coll Vet Med, Baoding 071001, Hebei, Peoples R China
2.Hebei Univ Engn, Coll Life Sci & Food Engn, Handan, Peoples R China
3.Shanxi Agr Univ, Coll Vet Med, Jinzhong, Peoples R China
4.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Freshwater Fisheries & Germplasm Resource, Minist Agr, Wuxi, Jiangsu, Peoples R China
关键词： Public health; Escherichia coli; pathogenic potential; phylogenetic analysis; virulence genes; genetic relatedness
期刊名称：JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES （ 影响因子：2.506； 五年影响因子：2.411 ）
ISSN： 0360-1234
年卷期： 2022 年 57 卷 11 期
页码：
收录情况： SCI
摘要： The centrality of milk and dairy products to the human diet allows potential pathogens to pose a threat to human health. Pathogenic Escherichia coli is a zoonotic foodborne pathogen with many virulence genes which cause variations in its pathogenicity. The current study aimed to investigate the pathogenic potential of E. coli from milk of dairy cows with subclinical mastitis and evaluate the genetic relatedness to E. coli from human sources. The majority of the E. coli isolates belonged to the A (55.0%) and B2 (22.5%) phylogenetic groups and the most prevalent virulence genes were colV (90.0%), fyuA (75.0%) and vat (42.5%). Mice injected with G4-BD23 (P < 0.05) and G5-BD3 had lower survival rates than controls and visible pathological changes to lung and kidney. Nineteen MLST types were identified in 40 dairy E. coli isolates and three STs (ST10, ST48 and ST942) were shared with those from human sources. Some dairy E. coli isolates were phylogenetically related to human E. coli isolates indicating pathogenic potential.
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