title: In vitro activity of ampicillin alone and in combination with different concentrations of 6 beta-bromopenicillanic acid, clavulanic acid and mecillinam.
abstract: The antibacterial activity of ampicillin against Enterobacteriaceae strongly increased when combined with 6 beta-bromopenicillanic acid (BPA) or clavulanic acid (CA). In vitro, the combination ampicillin: BPA in the ratio 1:1 proved to be the most effective one. The antibacterial activity of mecillinam against Enterobacteriaceae was strongly potentiated by the addition of ampicillin. The combination mecillinam:ampicillin in the ratio 4:5 showed an antibacterial activity comparable to that of new beta-lactam compounds such as cefotaxime and ceftazidime.
mesh_terms: D000560:Amdinocillin / Q000494:pharmacology*; D000667:Ampicillin / Q000494:pharmacology*; D019818:Clavulanic Acid; D002969:Clavulanic Acids / Q000494:pharmacology*; D004338:Drug Combinations; D004347:Drug Interactions; D004357:Drug Synergism; D004755:Enterobacteriaceae / Q000187:drug effects* / Q000201:enzymology; D008826:Microbial Sensitivity Tests; D010397:Penicillanic Acid / Q000494:pharmacology* / Q000031:analogs & derivatives; D065093:beta-Lactamase Inhibitors
chemical_list: D002969:Clavulanic Acids; D004338:Drug Combinations; D065093:beta-Lactamase Inhibitors; D019818:Clavulanic Acid; C018008:brobactam; D000667:Ampicillin; D010397:Penicillanic Acid; D000560:Amdinocillin