Title
pic gene of enteroaggregative Escherichia coli and its association with diarrhea in Peruvian children
Date Issued
01 August 2016
Access level
open access
Resource Type
journal article
Publisher(s)
Oxford University Press
Abstract
Enteroaggregative Escherichia coli (EAEC) causes acute and persistent diarrhea among children, HIV-infected patients, and travelers to developing countries. We have searched for 18 genes-encoding virulence factors associated with aggregative adherence, dispersion, biofilm, toxins, serine protease autotransporters of Enterobacteriaceae (SPATEs) and siderophores, analyzed in 172 well-characterized EAEC strains (aggR+) isolated from stool samples of 97 children with diarrhea and 75 healthy controls from a passive surveillance diarrhea cohort study in Peru. Eighty-one different genetic profiles were identified, 37 were found only associated with diarrhea and 25 with control samples. The most frequent genetic profile was aggC+aatA+aap+shf+fyuA+, present in 19 strains, including diarrhea and controls. The profile set1A+set1B+pic+ was associated with diarrhea (P < 0.05). Of all genes evaluated, the most frequent were aatA (CVD 342) present in 159 strains (92.4%) and fyuA in 157 (91.3%). When EAEC strains were analyzed as a single pathogen (excluding co-infections), only pic was associated with diarrhea (P < 0.05) and with prolonged diarrhea (diarrhea ≥ 7 days) (P < 0.05). In summary, this is the first report on the prevalence of a large set of EAEC virulence genes and its association with diarrhea in Peruvian children. More studies are needed to elucidate the exact role of each virulence factor.
Volume
74
Issue
6
Language
English
OCDE Knowledge area
Virología Pediatría
Scopus EID
2-s2.0-85014410109
PubMed ID
Source
Pathogens and Disease
ISSN of the container
2049632X
Sponsor(s)
This work was supported by the Agencia Española de Coop-eración Internacional para el Desarrollo (AECID) [grants nos D/019499/08, D/024648/09, D/030509/10 and A1/035720/11]. JR has a fellowship from the program I3 of the Instituto de Salud Carlos III (ISCII, Spain) [grant no. CES11/012].
Sources of information: Directorio de Producción Científica Scopus