Detección de la β-lactamasa de espectro extendido OXA-141 en cepas de Pseudomonas aeruginosa aisladas de pacientes con fibrosis quística

Maribel González-Villa, Rosa María Ribas-Aparicio, Rafael Coria-Jiménez, Jenny Elizabeth Donis-Rocandio, Gerardo Aparicio-Ozores

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

2 Citas (Scopus)

Resumen

Introduction: The aims of this research were to study the presence of extended spectrum β-lactamases (ESBL) to investigate the location of the genes encoding these enzymes, and determine the clonal relationship of strains of ceftazidime-resistant Pseudomonas aeruginosa isolated from Mexican patients with cystic fibrosis. Methods: We determined the resistance profile to 11 antibiotics (CLSI) and phenotypic ESBL detection following a disk diffusion method adapted for P. aeruginosa. Characterization of ESBL genes and integrons was performed by polymerase chain reaction (PCR) and DNA sequencing, while analysis of the clonal relationship was performed by pulsed field gel electrophoresis (PFGE). Results: Of the 148 strains studied, 22 were resistant to ceftazidime, and analysis by PCR and sequencing revealed the presence of the gene blaOXA-141 in 7 strains, 6 of which were resistant and one, susceptible to ceftazidime. In addition, blaGES was detected in 11 strains. intI2 and intI3 genes were not detected by PCR, but in the 6 ceftazidime-resistant strains, the blaOXA-141 gene was determined in a class 1 integron. Analysis of the clonal relationship of isolates showed that the majority of patients were infected during the study period with P. aeruginosa strains that exhibit different patterns, especially in individuals without a familial relationship. Conclusions: This report demonstrates the existence of the blaOXA-141 gene associated with a class 1 integron in several strains of P. aeruginosa, as well as blaGES genes, and their location and variants are being studied by our research group. This, combined with the diversity of strains able to infect several susceptible individuals, suggests the risk of spread of P. aeruginosa-strain ESBL producers among Mexican populations with cystic fibrosis.

Título traducido de la contribuciónDetection of extended spectrum β-lactamase OXA-141 in Pseudomonas aeruginosa strains isolated from patients with cystic fibrosis
Idioma originalEspañol
Páginas (desde-hasta)535-541
Número de páginas7
PublicaciónEnfermedades Infecciosas y Microbiologia Clinica
Volumen30
N.º9
DOI
EstadoPublicada - nov. 2012

Palabras clave

  • Antibiotic resistance
  • Cystic fibrosis
  • Pseudomonas aeruginosa
  • β-lactamase OXA

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