Article
Molecular characteristics of extendedspectrum b-lactamase-producing Escherichia coli from Rio de Janeiro, Brazil
Registro en:
PEIRANO, G. et al. Molecular characteristics of extendedspectrum b-lactamase-producing Escherichia coli from Rio de Janeiro, Brazil. Clinical Microbiology and Infection, v.17, p.1032-1052, 2011.
1198-743X
1469-0691
Autor
Peirano, G.
Asensi, M. D.
Pitondo-Silva, A.
Pitout, J. D. D.
Resumen
Twenty-five extended-spectrum b-lactamase (ESBL)-producing Escherichia coli clinical isolates from Rio de Janeiro, Brazil were characterized by isoelectric focusing, PCR and sequencing of blaESBL genes, plasmid-mediated quinolone resistance determinants, phylogenetic groups, replicon typing, pulsed-field electrophoresis, and multilocus sequencing typing. Twenty-three (92%) ESBL-producing E. coli isolates were positive for blaCTX-M genes, aac(6¢)-Ib-cr, and qnrB. Genetic relatedness of ESBL producers clustered seven (28%) CTX-M-15-producing isolates as sequence type (ST)410, clonal complex (CC) 23, and two (8%) as clone O25-ST131. Our results illustrate the predominance of phylogroup A (52%), ST410 (CC 23) and CTX-M-15 among ESBLproducing E. coli isolates from hospitals in Rio de Janeiro. 2030-01-01