Prevalence of virulence factors in Escherichia coli isolated from healthy animals and water sources in Brazil.
J Water Health
; 9(1): 138-42, 2011 Mar.
Article
em En
| MEDLINE
| ID: mdl-21301122
ABSTRACT
The aim of this work was to verify the presence of seven virulence factors (ST, LT, eae, stx(1), stx(2), INV and EAEC) among Escherichia coli strains isolated from healthy humans, bovines, chickens, sheep, pigs and goats, from two sewage treatment plants and from the Tietê River. We have found a high prevalence of eae, stx(1) and stx(2) in ruminants. The EAEC gene was only found in humans and sewage. No strains presented ST, LT or INV. BOX-PCR fingerprints revealed a high diversity among the strains analysed and a non-clonal origin of strains that presented the same virulence factors. Therefore, we concluded that ruminants may constitute an important reservoir of most diarrheagenic E. coli in Brazil, except for EAEC strains. These results emphasize the importance of the identification of the animal source of fecal contamination for the correct water risk assessment.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Proteínas de Escherichia coli
/
Fatores de Virulência
/
Rios
/
Escherichia coli
/
Animais Domésticos
Tipo de estudo:
Prevalence_studies
/
Prognostic_studies
Limite:
Animals
/
Humans
País como assunto:
America do sul
/
Brasil
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article