Complex ciprofloxacin resistome revealed by screening a Pseudomonas aeruginosa mutant library for altered susceptibility.
Pseudomonas aeruginosa offers substantial therapeutic challenges due to its high intrinsic resistance to many antibiotics and its propensity to develop mutational and/or adaptive resistance. The PA14 comprehensive mutant library was screened for mutants exhibiting either two- to eightfold increased susceptibilities (revealing genes involved in intrinsic resistance) or decreased susceptibilities (mutational resistance) to the fluoroquinolone ciprofloxacin. Thirty-five and 79 mutants with increased and decreased susceptibilities, respectively, were identified, as confirmed by broth dilution.
Breidenstein
Elena B M
EB
Centre for Microbial Diseases and Immunity Research, University of British Columbia, Room 232, 2259 Lower Mall, Lower Mall Research Station, Vancouver, British Columbia V6T1Z4, Canada.
Khaira
Bhavjinder K
BK
Wiegand
Irith
I
Overhage
Joerg
J
Hancock
Robert E W
RE
D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001426:Bacterial Proteins / Q000235:genetics*; D002939:Ciprofloxacin / Q000494:pharmacology*; D024881:Drug Resistance, Bacterial; D024841:Fluoroquinolones / Q000494:pharmacology; D015723:Gene Library; D006801:Humans; D008826:Microbial Sensitivity Tests; D009154:Mutation; D011550:Pseudomonas aeruginosa / Q000187:drug effects* / Q000235:genetics
D000900:Anti-Bacterial Agents; D001426:Bacterial Proteins; D024841:Fluoroquinolones; D002939:Ciprofloxacin