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[prevalence of extended-spectrum beta-lactamases in nosocomial escherichia coli and klebsiella spp. strains isolated from blood cultures].the aim of this study was to determine the prevalence of extended-spectrum beta-lactamases (esbls) in nosocomial bacteremia isolates of escherichia coli, klebsiella pneumoniae and klebsiella oxytoca at hacettepe university adult hospital in ankara, turkey. a total of 344 blood culture isolates of e. coli (n=244), k. pneumoniae (n=86) and k. oxytoca (n=34) were included in the study from january 2003 to november 2005. only one isolate from one patient was tested in the study. the isolates with ce ...200718173077
virulence properties of extended spectrum β-lactamase-producing klebsiella species in meat samples.the present study was carried out to identify virulence properties (siderophores, serum resistance, and hemolysin) and antibiotic resistance in extended spectrum β-lactamase (esbl)-producing klebsiella isolates from 60 calf and chicken meat samples purchased from various supermarkets in ankara, turkey. of the 45 klebsiella isolates, 24 (53%) were identified as k. oxytoca and 21 (47%) were identified as k. pneumoniae. a high proportion of klebsiella isolates had virulence factors such as hemolyti ...201121477469
[carbapenem resistance in esbl positive enterobacteriaceae isolates causing invasive infections].the aim of this study was to investigate the presence of carbapenem resistance in enterobacteriaeceae isolates recovered from invasive infections, in hacettepe university hospital, ankara, turkey, between 2005-2009, by phenotypic and genotypic methods. a total of 210 non-duplicated escherichia coli (n= 153), klebsiella pneumoniae (n= 47) and klebsiella oxytoca (n= 10) isolates which were all determined to be extended-spectrum beta-lactamase (esbl) positive with the bd phoenix automated identific ...201424506716
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