title: In vitro susceptibility of aerobic gram-negative blood culture isolates to oxolinic acid, norfloxacin, ciprofloxacin, enoxacin, pefloxacin, ofloxacin and oxo-enoxacin.
abstract: 100 gram-negative strains isolated from blood cultures were selected for the evaluation of the in vitro activity of oxolinic acid, norfloxacin, ciprofloxacin, enoxacin, pefloxacin, ofloxacin and oxo-enoxacin. Ciprofloxacin showed the highest intrinsic activity. Oxo-enoxacin, the major metabolite of enoxacin, was 10-15-fold less active than enoxacin. Against Enterobacteriaceae and Vibrionaceae, all fluorinated quinolones except norfloxacin were equally effective, while against non-fermenters, ciprofloxacin and ofloxacin demonstrated greater activity than the others. Resistance to oxolinic acid had a detrimental effect on susceptibility to the new fluorinated quinolones.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001769:Blood / Q000382:microbiology; D002939:Ciprofloxacin; D015365:Enoxacin / Q000031:analogs & derivatives; D004755:Enterobacteriaceae / Q000187:drug effects; D006088:Gram-Negative Aerobic Bacteria / Q000187:drug effects*; D006801:Humans; D008826:Microbial Sensitivity Tests; D009287:Naphthyridines / Q000494:pharmacology*; D009643:Norfloxacin / Q000031:analogs & derivatives / Q000494:pharmacology; D015242:Ofloxacin; D010078:Oxazines / Q000494:pharmacology; D010093:Oxolinic Acid / Q000494:pharmacology*; D015366:Pefloxacin; D011804:Quinolines / Q000494:pharmacology*; D014737:Vibrionaceae / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D009287:Naphthyridines; D010078:Oxazines; D011804:Quinolines; D015366:Pefloxacin; D015365:Enoxacin; D002939:Ciprofloxacin; C049814:4-oxo-enoxacin; D015242:Ofloxacin; D010093:Oxolinic Acid; D009643:Norfloxacin