Efflux pump overexpression in multiple-antibiotic-resistant mutants of Bacteroides fragilis
Lilian Pumbwe1, Daniel Glass, Hannah M Wexler
1Greater Los Angeles Veterans Administration Healthcare Systems, University of California, Los Angeles, CA 90073, USA.
Abstract:
Multidrug-resistant mutants of a wild-type Bacteroides fragilis strain (strain ADB77) and a quadruple resistance nodulation division family efflux pump deletion mutant (ADB77 Delta bmeB1 Delta bmeB3 Delta bmeB12 Delta bmeB15) were selected with antimicrobials. Ampicillin, doripenem, imipenem, levofloxacin, and metronidazole selected for mutants from both strains; cefoxitin selected for mutants from strain ADB77 only; and sodium dodecyl sulfate selected mutants from ADB77Delta bmeB1 Delta bmeB3 Delta bmeB12 Delta bmeB15 only. The mutants overexpressed one or more efflux pumps.
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