Virulence properties of Escherichia coli O111:H12 strains

Virulence properties of Escherichia coli O111:H12 strains

Autor Monteiro-Neto, Valério Google Scholar
Campos, Leila Carvalho Google Scholar
Ferreira, Antonio José Piantino Google Scholar
Gomes, Tania Aparecida Tardelli Autor UNIFESP Google Scholar
Trabulsi, Luiz Rachid Google Scholar
Instituição Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Resumo Seventeen Escherichia coli O111:H12 strains isolated from the feces of children with acute diarrhea were studied with regard to their adherence properties and other virulence characteristics. All strains showed an aggregative adherence pattern to HEp-2 cells and agglutinated bovine and sheep red cells in the presence of mannose. These strains did not have gene sequences homologous to the aggregative adherence fimbria I gene and did not react with any of the DNA probes used to detect other virulence genes in enteropathogens. With one exception, the O111:H12 strains did not induce fluid accumulation in the rabbit ileal loop assay, although 16 of the strains had the enteroaggregative E. coli heat-stable enterotoxin 1 (EAST1) gene sequences. A 60-70 MDa plasmid was present in 16 of the strains studied. We conclude that the O111 :H12 serotype, one of the first E. coli identified in infantile diarrhea, belongs to the enteroaggregative E. coli category but the genes encoding its adherence phenotype are distinct from those previously described.
Palavra-chave enteroaggregative Escherichia coli
adherence pattern
virulence properties
mannose-resistant hemagglutination activity
EAST1
Idioma Inglês
Data de publicação 1997-01-01
Publicado em Fems Microbiology Letters. Hoboken: Wiley-Blackwell, v. 146, n. 1, p. 123-128, 1997.
ISSN 0378-1097 (Sherpa/Romeo, fator de impacto)
Publicador Wiley-Blackwell
Extensão 123-128
Fonte http://dx.doi.org/10.1016/S0378-1097(96)00464-8
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:A1997WC41600019
Endereço permanente http://repositorio.unifesp.br/handle/11600/25650

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