In vivo selection of fluoroquinolone-resistant Escherichia coli isolates expressing plasmid-mediated quinolone resistance and expanded-spectrum beta-lactamase.
A ciprofloxacin-resistant Escherichia coli isolate, isolate 1B, was obtained from a urinary specimen of a Canadian patient treated with norfloxacin for infection due to a ciprofloxacin-susceptible isolate, isolate 1A. Both isolates harbored a plasmid-encoded sul1-type integron with qnrA1 and blaVEB-1 genes. Isolate 1B had amino acid substitutions in gyrase and topoisomerase.
Poirel
Laurent
L
Service de Bactériologie-Virologie, Hôpital de Bicêtre, Faculté de Médecine Paris-Sud, Université Paris XI, 94275 Le Kremlin-Bicêtre cedex, France.
Pitout
Johann D D
JD
Calvo
Lucy
L
Rodriguez-Martinez
Jose-Manuel
JM
Church
Deirdre
D
Nordmann
Patrice
P
D000890:Anti-Infective Agents / Q000494:pharmacology*; D001483:Base Sequence; D002939:Ciprofloxacin / Q000494:pharmacology; D003227:Conjugation, Genetic; D024881:Drug Resistance, Bacterial; D004926:Escherichia coli / Q000187:drug effects* / Q000201:enzymology / Q000235:genetics; D024841:Fluoroquinolones / Q000494:pharmacology*; D008969:Molecular Sequence Data; D010957:Plasmids; D001618:beta-Lactamases / Q000235:genetics*
D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D002939:Ciprofloxacin; D001618:beta-Lactamases