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Identification, antimicrobial resistance and genotypic characterization of enterococcus spp. isolated in Porto Alegre, Brazil

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Identification, antimicrobial resistance and genotypic characterization of enterococcus spp. isolated in Porto Alegre, Brazil

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Título Identification, antimicrobial resistance and genotypic characterization of enterococcus spp. isolated in Porto Alegre, Brazil
Autor Bender, Eduardo André
Freitas, Ana Lucia Peixoto de
Reiter, Keli Cristine
Lutz, Larissa
Barth, Afonso Luis
Abstract In the past two decades the members of the genus Enterococcus have emerged as important nosocomial pathogens worldwide. In the present study, we evaluated the antimicrobial resistance and genotypic characteristics of 203 Enterococcus spp. recovered from different clinical sources from two hospitals in Porto Alegre, Rio Grande do Sul, Brazil. The species were identified by conventional biochemical tests and by an automated system. The genetic diversity of E. faecalis presenting high-level aminoglycoside resistance (HLAR) was assessed by pulsed-field gel electrophoresis of chromosomal DNA after SmaI digestion. The E. faecalis was the most frequent specie (93.6%), followed by E. faecium (4.4%). The antimicrobial resistance profile was: 2.5% to ampicillin, 0.5% to vancomycin, 0.5% teicoplanin, 33% to chloramphenicol, 2% to nitrofurantoin, 66.1% to erythromycin, 66.5% to tetracycline, 24.6% to rifampicin, 30% to ciprofloxacin and 87.2% to quinupristin-dalfopristin. A total of 10.3% of the isolates proved to be HLAR to both gentamicin and streptomycin (HLR-ST/GE), with 23.6% resistant only to gentamicin (HLR-GE) and 37.4% only to streptomycin (HLR-ST). One predominant clonal group was found among E. faecalis HLR-GE/ST. The prevalence of resistance among beta-lactam antibiotics and glycopeptides was very low. However, in this study there was an increased number of HLR Enterococcus which may be spreading intra and inter-hospital.
Contido em Brazilian journal of microbiology. São Paulo, SP. Vol. 40, n. 3 (set. 2009), p. 693-700
Assunto Enterococcus
Resistência bacteriana
[en] Enterococcus
[en] HLAR
[en] PFGE
[en] Resistance
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/23958
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