title: In vitro activity of YTR 830.
abstract: YTR 830, now known as tazobactam, is a new penicillanic acid sulfone beta-lactamase inhibitor. The in vitro activity of YTR 830 combined with various penicillins was determined and compared to that of clavulanate and sulbactam combined with the same agents. Combined with ampicillin or amoxicillin, all three inhibitors were active against beta-lactamase producing strains of Staphylococcus aureus, Haemophilus influenzae, Klebsiella, Citrobacter diversus, and all anaerobes except for Bacteroides fragilis homology group II. YTR 830 was also effective against Escherichia coli and indole-positive Proteus. The inhibitors had no effect against Enterobacter or Serratia. Overall, the activity of YTR 830 was comparable to that of clavulanate, and superior to that of sulbactam.
authors.affiliation: Case Western Reserve University School of Medicine, Cleveland, OH 44106.
authors.forename: M R
authors.initials: MR
authors.lastname: Jacobs
authors.forename: S C
authors.initials: SC
authors.lastname: Aronoff
authors.forename: P C
authors.initials: PC
authors.lastname: Appelbaum
authors.forename: S
authors.initials: S
authors.lastname: Yamabe
mesh_terms: D000667:Ampicillin / Q000494:pharmacology; D001441:Bacteroides fragilis / Q000187:drug effects; D002969:Clavulanic Acids / Q000494:pharmacology; D004359:Drug Therapy, Combination / Q000494:pharmacology; D004755:Enterobacteriaceae / Q000187:drug effects*; D007709:Klebsiella / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D010397:Penicillanic Acid / Q000494:pharmacology*; D010878:Piperacillin / Q000494:pharmacology; D011514:Proteus vulgaris / Q000187:drug effects; D013407:Sulbactam / Q000494:pharmacology; D000078142:Tazobactam; D013982:Ticarcillin / Q000494:pharmacology; D065093:beta-Lactamase Inhibitors
chemical_list: D002969:Clavulanic Acids; D065093:beta-Lactamase Inhibitors; D000667:Ampicillin; D010397:Penicillanic Acid; D013982:Ticarcillin; D013407:Sulbactam; D000078142:Tazobactam; D010878:Piperacillin