Hep-2–Adherent Escherichia coli Strains Associated with Acute Infantile Diarrhea, São Paulo, Brazil

In this paired case-control study of infants with diarrhea in São Paulo, we examined the association between HEp-2–adherent Escherichia coli strains and diarrhea. We tested isolates from stool specimens of infants with diarrhea and matched controls in an HEp-2 cell adherence assay; we then hybridize...

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Detalles Bibliográficos
Autores principales: Scaletsky, Isabel C. A., Fabbricotti, Sandra H., Silva, Sueli O. C., Morais, Mauro B., Fagundes-Neto, Ulysses
Formato: Texto
Lenguaje:English
Publicado: Centers for Disease Control and Prevention 2002
Materias:
Dispatch
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2732515/
https://www.ncbi.nlm.nih.gov/pubmed/12141974
http://dx.doi.org/10.3201/eid0808.010492
Descripción
Sumario:In this paired case-control study of infants with diarrhea in São Paulo, we examined the association between HEp-2–adherent Escherichia coli strains and diarrhea. We tested isolates from stool specimens of infants with diarrhea and matched controls in an HEp-2 cell adherence assay; we then hybridized isolates with DNA probes and identified enteropathogenic E. coli (EPEC), enteroaggregative E. coli (EAEC), and diffusely adherent E. coli (DAEC). From 100 patient-control pairs, we isolated 78 HEp-2–adherent strains; of these, 61 strains were single pathogens identified in stools of infants with diarrhea. While typical EPEC was significantly associated with diarrhea (p<0.001), EAEC was more frequently associated with diarrhea in clinical cases (20%) compared with healthy controls (3%) (p<0.001). Atypical EPEC, showing a localized adherence-like pattern, was also more common in patients than controls (p>0.1). DAEC was isolated with equal frequency from patients and controls (p>0.1).

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