Detection of diarrheagenic Escherichia coli from children with and without diarrhea in Salvador, Bahia, Brazil
| Autor: | Vanessa Bueris, Marcelo Palma Sircili, Carla Romano Taddei, Maurilio Fernandes dos Santos, Marcia Regina Franzolin, Marina Baquerizo Martinez, Suzana Ramos Ferrer, Mauricio Lima Barreto, Luiz Rachid Trabulsi |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Memorias do Instituto Oswaldo Cruz, Vol 102, Iss 7, Pp 839-844 (2007) |
| Druh dokumentu: | article |
| ISSN: | 0074-0276 1678-8060 |
| Popis: | We identified different diarrheagenic (DEC) Escherichia coli pathotypes isolated from 1,207 children with and without acute endemic diarrhea in Salvador, Bahia, Brazil collected as part of a case-control study. Since the identification of DEC cannot be based on only biochemical and culture criteria, we used a multiplex polymerase chain reaction developed by combining five specific primer pairs for Enteropathogenic Escherichia coli (EPEC), Shiga toxin-producing E. coli/ Enterohaemorrhagic E. coli (STEC/EHEC), Enterotoxigenic E. coli (ETEC) and Enteroaggregative E. coli (EAEC) to detect these pathotypes simultaneously in a single-step reaction. In order to distinguish typical and atypical EPEC strains, these were tested for the presence of EAF plasmid. The prevalence of diarrheagenic E. coli in this sample of a global case-control study was 25.4% (259 patients) and 18.7% (35 patients) in the diarrhea group (1,020 patients) and the control group (187 patients), respectively. The most frequently isolated pathotype was EAEC (10.7%), followed by atypical EPEC (9.4%), ETEC (3.7%), and STEC (0.6%). Typical EPEC was detected only in one sample. The prevalence of the pathotypes studied in children with diarrhea was not significantly different from that in children without diarrhea. |
| Databáze: | Directory of Open Access Journals |
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