title: Bactericidal activity and synergy studies of proton pump inhibitors and antibiotics against Helicobacter pylori in vitro.
abstract: The bactericidal activity of the proton pump inhibitors omeprazole and lansoprazole alone and in combination with a beta-lactam or macrolide antibiotic were investigated in vitro. Time-kill curves against Helicobacter pylori NCTC 11637 and a recent clinical isolate revealed significant concentration-dependent killing with all drugs other than amoxycillin. Combinations of proton pump inhibitor and erythromycin showed synergic activity. In contrast, proton pump inhibitor plus amoxycillin showed additive activity against the clinical isolate only. Bactericidal investigations of anti-helicobacter drugs in vitro may suggest optimum treatment strategies for this common infectious disease.
authors.affiliation: Department of Microbiology and Infectious Diseases, Monash Medical Centre, Clayton, Victoria, Australia.
authors.forename: P D
authors.initials: PD
authors.lastname: Midolo
authors.forename: J D
authors.initials: JD
authors.lastname: Turnidge
authors.forename: J R
authors.initials: JR
authors.lastname: Lambert
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000658:Amoxicillin / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D004357:Drug Synergism; D004791:Enzyme Inhibitors / Q000494:pharmacology; D004917:Erythromycin / Q000494:pharmacology; D016480:Helicobacter pylori / Q000187:drug effects*; D064747:Lansoprazole; D008826:Microbial Sensitivity Tests; D009853:Omeprazole / Q000031:analogs & derivatives / Q000494:pharmacology; D054328:Proton Pump Inhibitors
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000900:Anti-Bacterial Agents; D004791:Enzyme Inhibitors; D054328:Proton Pump Inhibitors; D064747:Lansoprazole; D004917:Erythromycin; D000658:Amoxicillin; D009853:Omeprazole