This study aimed to detect virulence factors, pathovars, and phylogenetic groups of Escherichia coli strains obtained from feces of calves with and without diarrhea up to 70 days old and to determine the association between occurrence of diarrhea, phylogenetic groups, and pathovars. Phylo-typing analysis of the 336 E. coli strains isolated from calves with Clermont method showed that 21 (6.25 %) belong to phylogroup A, 228 (67.85 %) to phylogroup B1, 2 (0.6 %) to phylogroup B2, 5 (1.49 %) to phylogroup C, 57 (16.96 %) to phylogroup E, and 3 (0.9 %) to phylogroup F. Phylogroup D was not identified and 20 strains (5.95 %) were assigned as "unknown." The distribution of phylogenetic groups among pathovars showed that NTEC belong to phylogroups B1 (17) and C (4); EPEC to phylogroups B1 (6) and E (8); STEC to phylogroups A (5), B1 (56), B2 (2), C (1), and E (15); EHEC to phylogroups B1 (95) and E (5); and ETEC to phylogroups A (3), B1 (7), and E (10). The EAST-1 strains were phylogroups A (13), B1 (47), E (19), and F (3); E. coli strains of "unknown" phylogroups belonged to pathovars EPEC (1), EHEC (2), STEC (7), and EAST-1 strains (6). ETEC was associated with diarrhea (P = 0.002). Our study did not find association between the phylogenetic background and occurrence of diarrhea (P = 0.164) but did find some relationship in phylogenetic group and pathovar. The study showed that EHEC and STEC are classified as phylogroup B1, EAST-1 phylogroup A, ETEC, and EPEC phylogroup E.

• MeSH
• DNA bakterií genetika   MeSH
• enteropatogenní Escherichia coli klasifikace   genetika   růst a vývoj   patogenita   MeSH
• enterotoxigenní Escherichia coli klasifikace   genetika   růst a vývoj   patogenita   MeSH
• exprese genu MeSH
• faktory virulence genetika   metabolismus   MeSH
• feces mikrobiologie   MeSH
• fylogeneze MeSH
• genotyp MeSH
• infekce vyvolané Escherichia coli diagnóza   mikrobiologie   patologie   veterinární   MeSH
• nemoci skotu diagnóza   mikrobiologie   patologie   MeSH
• polymerázová řetězová reakce MeSH
• průjem diagnóza   mikrobiologie   patologie   veterinární   MeSH
• shiga-toxigenní Escherichia coli klasifikace   genetika   růst a vývoj   patogenita   MeSH
• skot MeSH
• techniky typizace bakterií MeSH
• virulence MeSH
• zvířata MeSH
• Check Tag
• mužské pohlaví MeSH
• skot MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Brazílie MeSH