Comparative in vitro studies of cinoxacin, nalidixic acid, and oxolinic acid.
Cinoxacin and nalidixic acid were found to be similar in in vitro activity against 138 Shigella isolates and somewhat less active than oxolinic acid on a weight basis. Cross-resistance developed when 10 shigellae were transferred on increasing amounts of the respective agent contained in Mueller-Hinton agar. Plate dilution studies of the effect of changes in agar pH on the minimum inhibitory concentration revealed that the antibacterial activity increased with decreasing pH. Protein binding investigations revealed a high degree of binding, with nalidixic acid > oxolinic acid > cinoxacin.
D003470:Culture Media; D004148:Dioxolanes / Q000494:pharmacology; D004352:Drug Resistance, Microbial; D006863:Hydrogen-Ion Concentration; D009268:Nalidixic Acid / Q000494:pharmacology*; D010093:Oxolinic Acid / Q000494:pharmacology; D011485:Protein Binding; D011724:Pyridazines / Q000494:pharmacology*; D012763:Shigella flexneri / Q000187:drug effects*; D012764:Shigella sonnei / Q000187:drug effects
D003470:Culture Media; D004148:Dioxolanes; D011724:Pyridazines; D009268:Nalidixic Acid; D010093:Oxolinic Acid