Journal
BMC MICROBIOLOGY
Volume 10, Issue -, Pages -Publisher
BIOMED CENTRAL LTD
DOI: 10.1186/1471-2180-10-25
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Funding
- Branco Weiss Fellowship
- Fundacao de Amparo a Pesquisa de Sao Paulo (Fapesp)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- NSF [0516591]
- Direct For Biological Sciences
- Div Of Molecular and Cellular Bioscience [0516591] Funding Source: National Science Foundation
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Background: We recently observed an association of resistance with a certain enteropathogenic Escherichia coli (EPEC) serotypes and identified a conjugative plasmid, similar to plasmid pED208, that was conserved among archival O111:H2/NM and O119:H2 strains of diverse geographical origin. In this study, we sought to determine the prevalence and distribution of this plasmid among a collection of EPEC isolates from Brazil, as well as to study the susceptibilities of these isolates to antimicrobial agents. Results: Resistance was more commonly seen in typical EPEC than atypical strains. The most prevalent resistances were to ampicillin, tetracycline, streptomycin and the sulfonamides. Markers for the EPEC conjugative multiresistance plasmid, were detected in 21 (30%) of typical but only 4 (5%) of atypical strains (p=0.001, Chi-squared test). This plasmid, previously reported from only O111 and O119 strains was found in O55 and O127 strains and was associated with the presence of class 1 integrons. Conclusion: Our data suggest a limited but expanding host range for the EPEC resistance plasmid.
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