Introduction: The aim of this study was to detect the prevalence of the extended-spectrum beta-lactamase (ESBL)-encoding CTX-M gene in Escherichia coliisolates.
Methods: Phenotypic screening of 376 E. coli isolates for ESBL was conducted using disk diffusion. ESBL-producing isolates were tested using PCR and specific primers. The bla(CTX-M) cluster was identified using the RFLP method, and its genotype was sequenced.
Results: From 202 ESBL-producing E. coli , 185 (91.5%) possessed CTX-M genes. CTX-M-1 subtypes were found in 98% of the isolates. The bla(CTX-M) gene was identical to CTX-M-15.
Conclusions: A high prevalence of CTX-M-1-producing E. coli apparently exists in Shiraz, Iran.
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| http://dx.doi.org/10.1590/0037-8682-0315-2014 | DOI Listing |
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