期刊
CLINICAL MICROBIOLOGY AND INFECTION
卷 17, 期 7, 页码 1039-1043出版社
ELSEVIER SCI LTD
DOI: 10.1111/j.1469-0691.2010.03440.x
关键词
Brazil; CTX-M-15; Escherichia coli; phylogroup A; ST410
资金
- Calgary Laboratory Services [73-4063]
- Merck (Canada)
- Merck
- Astra Zeneca
Twenty-five extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli clinical isolates from Rio de Janeiro, Brazil were characterized by isoelectric focusing, PCR and sequencing of bla(ESBL) 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 bla(CTX-M) genes, aac(6')-lb-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 phylo-group A (52%), ST410 (CC 23) and CTX-M-15 among ESBL-producing E. coli isolates from hospitals in Rio de Janeiro.
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