title: In vitro comparison of A-56619, A-56620, amifloxacin, ciprofloxacin, enoxacin, norfloxacin, and ofloxacin against methicillin-resistant Staphylococcus aureus.
abstract: Seven quinolone antibiotics were tested against 115 isolates of methicillin-resistant Staphylococcus aureus. The MICs for 90% of the strains tested were 0.5 microgram/ml for A-56619, A-56620, ciprofloxacin, and ofloxacin; 2.0 micrograms/ml for amifloxacin and enoxacin; and 4.0 micrograms/ml for norfloxacin. Killing kinetic studies showed a similar killing rate for all seven antibiotics.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D000890:Anti-Infective Agents; D002939:Ciprofloxacin / Q000031:analogs & derivatives; D015365:Enoxacin; D024841:Fluoroquinolones; D006801:Humans; D008712:Methicillin / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D009287:Naphthyridines / Q000494:pharmacology; D009643:Norfloxacin / Q000494:pharmacology; D015242:Ofloxacin; D010078:Oxazines / Q000494:pharmacology; D010403:Penicillin Resistance; D010879:Piperazines / Q000494:pharmacology; D011804:Quinolines / Q000494:pharmacology; D013211:Staphylococcus aureus / Q000187:drug effects*
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D009287:Naphthyridines; D010078:Oxazines; D010879:Piperazines; D011804:Quinolines; D015365:Enoxacin; D002939:Ciprofloxacin; C040691:amifloxacin; C047225:difloxacin; D015242:Ofloxacin; D009643:Norfloxacin; D008712:Methicillin; C047224:sarafloxacin