Active efflux of norfloxacin by Bacteroides fragilis

Miyamae, S.; Nikaido, H.; Tanaka, Y.; Yoshimura, F.

Antimicrobial Agents and ChemoTherapy 42(8): 2119-2121

1998


ISSN/ISBN: 0066-4804
PMID: 9687419
Document Number: 486979
Norfloxacin was actively pumped out by Bacteroides fragilis, which is intrinsically resistant to most fluoroquinolones. Reserpine moderately inhibited the efflux. A one-step spontaneous mutant had increased resistance to norfloxacin, ethidium bromide, and puromycin, a result suggesting that the efflux is catalyzed by a multidrug pump with specificity similar to that of NorA/Bmr.

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