title: PS-5, a new beta-lactam antibiotic. III. Synergistic effects and inhibitory activity against a beta-lactamase.
abstract: PS-5 was shown to have synergistic activity in combination with other beta-lactam antibiotics and it markedly decreased the minimum inhibitory concentration values of ampicillin or cephaloridine with a beta-lactamase-producing Proteus vulgaris strain on agar plates. The synergistic activities were also shown in bactericidal activity in liquid medium. PS-5 was shown to be inhibitory against an extracted beta-lactamase of P. volgaris.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects*; D004357:Drug Synergism; D007700:Kinetics; D008826:Microbial Sensitivity Tests; D011514:Proteus vulgaris / Q000187:drug effects / Q000201:enzymology; D065093:beta-Lactamase Inhibitors; D047090:beta-Lactams / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D065093:beta-Lactamase Inhibitors; D047090:beta-Lactams