Mar Olga Pérez-Moreno

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The incidence of simultaneous infection or colonisation by two carbapenemase-producing Enterobacteriaceae (CPE) is increasing mainly due to the transfer of carbapenemase genes between two bacterial species. However, simultaneous carriage in the same patient of two or more different species of CPE producing distinct carbapenemase types is very unusual. The(More)
This study investigated the mechanisms involved in reduced susceptibility to amoxycillin-clavulanic acid and the prevalence of enzymes compatible with inhibitor-resistant TEM (IRT) beta-lactamases produced by Escherichia coli isolates from patients in north-eastern Spain. The resistance mechanisms of 158 strains showing resistance or intermediate resistance(More)
This work investigates the occurrence and features of class 1 integrons and the presence of transferable quinolone resistance determinants (TQRD) among 382 clinical Salmonella enterica isolates of non-Typhimurium serotypes as well as the β-lactamases produced by amoxicillin-resistant isolates. These isolates were recovered in 2001 and from 2004 to 2009 from(More)
The aim of this work was to investigate the molecular epidemiology and mechanisms responsible for reduced susceptibility to amoxicillin/clavulanic acid (AMC) amongst cefazolin-susceptible Klebsiella pneumoniae isolates from patients admitted to a chronic care institution. In total, 51 (29.8%) of 171 K. pneumoniae isolates recovered between 2006 and 2008(More)
OBJECTIVE To evaluate the effectiveness of systematic investigation for Group B Streptococcus (GBS) in urine samples to detect colonization in pregnant women. METHODS This study included 1036 pregnant women whose urine samples were cultured in our laboratory during 2006. Any colony consistent with GBS was identified in urine or in rectovaginal samples(More)
PURPOSE Current evidence is inconclusive regarding the intrapartum administration of chemoprophylaxis, merely based on the presence of group B streptococcal (GBS) bacteriuria of any colony count, in the prevention of early-onset neonatal GBS infection. The aim of this study was to assess whether GBS bacteriuria is a risk factor for intrapartum colonization(More)
OBJECTIVE To assess the frequency of class 1 integrons among isolates of Salmonella enterica producing different types of beta-lactamases from the health region of Tortosa, and to attempt to establish the resistance genes located within their variable regions. METHODS The presence of class 1 integrons and of aadA1, aadA2, dfrA1, tem-1, oxa-1 and pse-1(More)
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