The use of molecular typing to evaluate the dissemination of antimicrobial resistance among gram-negative rods in Brazilian hospitals
Título del documento: The use of molecular typing to evaluate the dissemination of antimicrobial resistance among gram-negative rods in Brazilian hospitals
Revista: The brazilian journal of infectious diseases
Base de datos: PERIÓDICA
Número de sistema: 000290758
ISSN: 1413-8670
Autors: 1
1
1
Institucions: 1Universidade Federal de Sao Paulo, Laboratorio Especial de Microbiologia Clinica, Sao Paulo. Brasil
2Universidade Federal de Santa Catarina, Centro de Ciencias Biologicas, Florianopolis, Santa Catarina. Brasil
Any:
Període: Dic
Volum: 7
Número: 6
Paginació: 360-369
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Caso clínico, analítico
Resumen en inglés Antimicrobial resistance has increased rapidly in Brazil and worldwide during the past few years, giving rise to a growing necessity for antimicrobial resistance surveillance programs. These programs have been instituted in order to monitor bacterial resistance in various regions, and to guide empirical antimicrobial therapy. We evaluated the use of molecular typing in multicenter surveillance programs. We also studied the dissemination modes of selected resistance profiles. Antimicrobial susceptibility to various antimicrobial agents was evaluated by the reference broth microdilution method. Bacterial isolates with selected susceptibility patterns were characterized by pulsed field-gel electrophoresis (PFGE). A total of 119 Gram-negative bacteria were molecularly typed, including 22 imipenem-resistant Pseudomonas aeruginosa, 26 ESBL-producing Escherichia coli, 27 cefoxitin-resistant-ESBL-producing Klebsiella pneumoniae, 33 Enterobacter spp., 8 Citrobacter spp., and 3 S. marcescens isolates resistant to ceftazidime. The isolates were from clinically apparent bacteremia of patients hospitalized in medical centers located in 13 cities of 11 Brazilian states. Our molecular typing results revealed a great genetic diversity among isolates of the same species. However, some major PFGE patterns were found in more than one isolate. All repeated PFGE patterns were detected in only 2 isolates, which were isolated within the same institutions or in different medical centers. We conclude that the ability to characterize organisms phenotypicall
Disciplines Química,
Medicina
Paraules clau: Bioquímica,
Microbiología,
Genética,
Tipificación molecular,
Electroforesis en gel de campo pulsado,
Resistencia antimicrobiana,
Carbapenemas,
Pseudomonas aeruginosa,
Difusión de clones,
Programa centinela
Keyword: Chemistry,
Medicine,
Biochemistry,
Microbiology,
Molecular typing,
Pulsed field gel electrophoresis,
Antimicrobial resistance,
Carbapenems,
Pseudomonas aeruginosa,
Clonal dissemination,
Sentinela Program,
Genetics
Text complet: Texto completo (Ver HTML)