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The aim of this study, was to characterize the extended-spectrum-β-lactamases (ESBLs) producing clinical strains of  Escherichia coli  isolated between January 2009 and June 2012 from Algerian hospitals and to determine the prevalence of 16S rRNA methylase among them. Sixty-seven ESBL-producers were detected among the 239 isolates included: 52 CTX-M-15-producers, 5 CTX-M-3-producers, 5 CTX-M-1-producers, 2 CTX-M-14-producers, 2 SHV-12-producers and one TEM-167-producer. Among the ESBL–producing strains twelve harbored 16S rRNA methylase genes: 8  rmtB  and 4  armA .  rmtB  was located on a IncFIA plasmid and  armA  was located either on a IncL/M or a IncFIA plasmid. RmtB-producing isolates were genotypically related and belonged to the sequence type ST 405 whereas ArmA-producing isolates belonged to ST10, ST 167, and ST 117. This first description of 16S rRNA methylases among  E. coli  in Algerian hospitals pointed out the necessity to establish control measures to avoid their dissemination.

frontiers in microbiology

Occurence of ArmA and RmtB Aminoglycoside Resistance 16S rRNA Methylases in Extended-Spectrum β-Lactamases Producing Escherichia coli in Algerian Hospitals