María Araque

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We isolated aerobic and anaerobic facultative bacteria inhabiting the crop of adult Dusky-billed Parrotlets (Forpus modestus). We looked for bacteria capable of hydrolyzing starch, the most abundant polysaccharide in seeds. We compared our results with bacteria isolated from the crop of three species of doves with granivorous–frugivorous diet and three(More)
During the last decade, carbapenem resistance has emerged among clinical isolates of the Enterobacteriaceae family. This has been increasingly attributed to the production of β-lactamases capable of hydrolyzing carbapenems. Among these enzymes, Klebsiella pneumoniae carbapenemases (KPCs) are the most frequently and clinically significant class-A(More)
Twelve Klebsiella pneumoniae isolates resistant to expanded-spectrum cephalosporins and aztreonam, from patients with nosocomial septicaemia at the intensive care unit of the Andes University Hospital, Mérida, Venezuela, were studied for production of extended-spectrum beta-lactamase (ESbetaL) activity. All were also resistant to gentamicin, kanamycin,(More)
Klebsiella pneumoniae is the principal opportunist pathogen associated with nosocomial infections. The morbidity and mortality produced by this microorganism is related mostly to antimicrobial resistance and its capacity to form biofilms. In this study, the phenotypic variations of susceptibility in 50 Klebsiella pneumoniae strains (26 betaLEE-producer and(More)
Chemical constituents of the essential oil from the leaves of Minthostachys mollis (Kunth) Griseb Vaught var. mollis collected in January 2008 at Tuñame, Trujillo State, Venezuela, were separated and identified by GC-MS analysis. The essential oil was obtained by hydrodistillation and thirteen components (98.5% of the sample) were identified by comparison(More)
In North America, the indigenous groups have been identified as a population with increased risk of pneumococcal colonization and pneumococcal invasive disease. However, little information is available from South American natives. In the present study we evaluated the nasopharyngeal carriage and serotype distribution of Streptococcus pneumoniae in mothers(More)
Nosocomial infections are a significant cause of morbidity and mortality throughout the world. In developing countries it is difficult to carry out effective surveillance and control programs for this type of infection because of the cost in both human and material resources. These considerations prompted us to perform a prospective study to determine the(More)
The objectives of this study were to determine the kinetic parameters of purified recombinant BlaMab and BlaMmas by spectrophotometry, analyze the genetic environment of the blaMab and blaMmas genes in both species by polymerase chain reaction and sequencing, furthermore, in silico models of both enzymes in complex with imipenem were obtained by modeling(More)
A clinical isolate of C. freundii with reduced susceptibility to extended-spectrum β-lactams from a woman with cystocele associated with recurrent urinary tract infection was analyzed. Susceptibility tests, double disk synergy tests (DDST) and enzymatic activity by the agar iodometric method suggested the presence of ESBLs. Conjugation experiments revealed(More)