title: Fluoroquinolone-resistant mutants of Burkholderia cepacia.
abstract: Fluoroquinolone-resistant Burkholderia cepacia mutants were selected on ciprofloxacin. The rate of mutation in gyrA was estimated to be 9.6 x 10(-11) mutations per division. Mutations in gyrA conferred 12- to 64-fold increases in MIC, and an additional parC mutation conferred a large increase in MIC (>256-fold). Growth rate, biofilm formation, and survival in water and during drying were not impaired in strains containing single gyrA mutations. Double mutants were impaired only in growth rate (0.85, relative to the susceptible parent).
authors.affiliation: Centre for Medical Microbiology, Royal Free and University College Medical School, Rowland Hill Street, London NW3 2PF, United Kingdom.
authors.forename: C F
authors.initials: CF
authors.lastname: Pope
authors.forename: S H
authors.initials: SH
authors.lastname: Gillespie
authors.forename: J R
authors.initials: JR
authors.lastname: Pratten
authors.forename: T D
authors.initials: TD
authors.lastname: McHugh
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology*; D018441:Biofilms / Q000187:drug effects / Q000254:growth & development; D016956:Burkholderia cepacia / Q000187:drug effects / Q000235:genetics / Q000254:growth & development; D002939:Ciprofloxacin / Q000494:pharmacology*; D015169:Colony Count, Microbial; D027081:DNA Gyrase / Q000235:genetics; D027101:DNA Topoisomerase IV / Q000235:genetics; D003890:Desiccation; D024881:Drug Resistance, Bacterial / Q000235:genetics*; D024841:Fluoroquinolones / Q000494:pharmacology*; D006801:Humans; D008826:Microbial Sensitivity Tests; D009154:Mutation; D014871:Water Microbiology
chemical_list: D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D002939:Ciprofloxacin; D027101:DNA Topoisomerase IV; D027081:DNA Gyrase