| Registro completo |
| Provedor de dados: |
Ciência Rural
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| País: |
Brazil
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| Título: |
Detection of virulence genes and the phylogenetic groups of Escherichia coli isolated from dogs in Brazil
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| Autores: |
Coura,Fernanda Morcatti
Diniz,Amanda Nadia
Oliveira Junior,Carlos Augusto
Lage,Andrey Pereira
Lobato,Francisco Carlos Faria
Heinemann,Marcos Bryan
Silva,Rodrigo Otávio Silveira
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| Data: |
2018-01-01
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| Ano: |
2018
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| Palavras-chave: |
Dogs
Escherichia coli
Pathovars
Phylogroups
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| Resumo: |
ABSTRACT: This study identified the virulence genes, pathovars, and phylogenetic groups of Escherichia coli strains obtained from the feces of dogs with and without diarrhea. Virulence genes and phylogenetic group identification were studied using polymerase chain reaction. Thirty-seven E. coli isolates were positive for at least one virulence factor gene. Twenty-one (57.8%) of the positive isolates were isolated from diarrheal feces and sixteen (43.2%) were from the feces of non-diarrheic dogs. Enteropathogenic E. coli (EPEC) were the most frequently (62.2%) detected pathovar in dog feces and were mainly from phylogroup B1 and E. Necrotoxigenic E. coli were detected in 16.2% of the virulence-positive isolates and these contained the cytotoxic necrotizing factor 1 (cnf1) gene and were classified into phylogroups B2 and D. All E. coli strains were negative for the presence of enterotoxigenic E. coli (ETEC) enterotoxin genes, but four strains were positive for ETEC-related fimbriae 987P and F18. Two isolates were Shiga toxin-producing E. coli strains and contained the toxin genesStx2 or Stx2e, both from phylogroup B1. Our data showed that EPEC was the most frequent pathovar and B1 and E were the most common phylogroups detected in E. coli isolated from the feces of diarrheic and non-diarrheic dogs.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000200452
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| Editor: |
Universidade Federal de Santa Maria
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| Relação: |
10.1590/0103-8478cr20170478
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| Formato: |
text/html
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| Fonte: |
Ciência Rural v.48 n.2 2018
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| Direitos: |
info:eu-repo/semantics/openAccess
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