title: In-vitro antibacterial activity of BO-1165, a new monobactam antibiotic.
abstract: BO-1165 has excellent antibacterial activity against Gram-negative bacteria but it is almost inactive against Gram-positive and anaerobic bacteria. BO-1165 was more active than the four reference drugs against Escherichia coli, Salmonella spp., Shigella spp., Klebsiella pneumoniae, Serratia marcescens, indole-positive and indole-negative Proteus. Also, BO-1165 exhibited high antibacterial activity against strains of Pseudomonas aeruginosa (MIC50, 3.12 mg/l) and P. cepacia (MIC50, 1.56 mg/l), but did not against Ps. maltophilia strains. BO-1165 had good stability to plasmid-mediated and chromosome-mediated beta-lactamases. However, the compound was slightly hydrolyzed by the beta-lactamases isolated from Proteus vulgaris, Ps. cepacia, Klebsiella oxytoca and Ps. maltophilia, which were capable of hydrolyzing aztreonam.
mesh_terms: D001398:Aztreonam / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects* / Q000201:enzymology; D002439:Cefotaxime / Q000494:pharmacology; D002442:Ceftazidime / Q000494:pharmacology; D004352:Drug Resistance, Microbial; D004355:Drug Stability; D007700:Kinetics; D008997:Monobactams / Q000494:pharmacology*; D001618:beta-Lactamases / Q000378:metabolism
chemical_list: D008997:Monobactams; C049815:BO 1165; D002442:Ceftazidime; D001618:beta-Lactamases; D001398:Aztreonam; D002439:Cefotaxime