Escherichia coliETEC, EPEC, NTEC and STEC/EHEC pathotypes are often isolated from bovine feces. The objective of this study was to detect 21E. colivirulence genes in feces from 252 dairy calves in Uruguay (149 with neonatal diarrhea – NCD – and 103 asymptomatic). GenesiucD,f17A,afa8E,papC,clpGandf17G(II)were the most prevalent (81.3%; 48.4%; 37.3%; 35.7%; 34.1%; 31.3%, respectively). Geneseae,stx1andstx2were poorly represented; 13/252 animals harbored one or a combination of these genes. The prevalence of thecnfgene was 4.4%, while that ofcdt-IVandcdt-IIIgenes was 24.2% and 12.7% respectively. This study reports updated data about the virulence profiles ofE. coliin dairy calves in Uruguay. A large number of adhesins and toxin genes were detected. Our results demonstrate thatE. colifrom bovine feces has diarrheagenic and extraintestinal profiles although other NCD risks factors may contribute to the disease outcome.
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