Combinations of putative virulence markers in typical and variant enteroaggregative Escherichia coli strains from children with and without diarrhoea

Combinations of putative virulence markers in typical and variant enteroaggregative Escherichia coli strains from children with and without diarrhoea

Autor Elias Junior, Waldir Pereira Autor UNIFESP Google Scholar
Uber, A. P. Google Scholar
Tomita, S. K. Google Scholar
Trabulsi, L. R. Google Scholar
Gomes, TAT Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Inst Butantan
Resumo Enteroaggregative Escherichia coli (EAEC) is defined by the ability to produce aggregative adherence (AA) to cultured cells. We analysed 128 EAEC strains, isolated from children with and without diarrhoea, regarding the presence of 11 EAEC virulence genes. Seventy strains carried and 58 lacked the EAEC probe sequence; 17 probe positive and 31 probe negative strains showed variations in the AA pattern. All EAEC probe positive strains carried at least one EAEC marker; asp U (94.3%), irp2 (91.4%), and aggR (74.3%) were the most prevalent. Conversely, among the EAEC probe negative strains, 41.4% were devoid of any marker and astA predominated (44.8%). No significant statistical difference in the prevalence of any marker between cases and controls in both EAEC probe groups or AA variants was found. We suggest that the EAEC probe positive strains may have a higher pathogenic potential or alternatively, EAEC probe negative strains may harbour virulence factors as yet undescribed.
Idioma Inglês
Data 2002-08-01
Publicado em Epidemiology and Infection. New York: Cambridge Univ Press, v. 129, n. 1, p. 49-55, 2002.
ISSN 0950-2688 (Sherpa/Romeo, fator de impacto)
Editor Cambridge Univ Press
Extensão 49-55
Fonte http://dx.doi.org/10.1017/S0950268802007136
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000177607200007
URI http://repositorio.unifesp.br/handle/11600/26937

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