MetronidazoleAntitrichomonal AgentsNitroreductasesHelicobacter pyloriAmoxicillinAnti-Bacterial AgentsClarithromycinBismuthNitroimidazolesHelicobacter InfectionsBacteria, AnaerobicTrichomonas vaginalisTinidazoleAnti-Infective AgentsTrichomonas VaginitisBacteroides fragilisAnti-Ulcer AgentsClindamycinOmeprazoleDrug Therapy, CombinationBacteroides InfectionsEnterocolitis, PseudomembranousVaginosis, BacterialMicrobial Sensitivity TestsTetracyclineOrnidazoleClostridium difficileAntiprotozoal AgentsTritrichomonasNimorazoleDrug Resistance, MicrobialFurazolidoneAmebicidesNitrofuransRosaceaBacteroidesGardnerella vaginalisDrug Resistance, BacterialRanitidineGiardia lambliaSuppositoriesPyruvate SynthaseAdministration, OralTrichomonasTreatment OutcomeBacteria, AerobicGiardiasisDuodenal UlcerPeptostreptococcusOrganometallic CompoundsNiridazolePremedicationEntamoeba histolyticaPenicillinsPeptic Ulcer2-PyridinylmethylsulfinylbenzimidazolesDouble-Blind MethodAnaerobiosisNifuratelDrug ResistanceTrichomonas InfectionsBacterial InfectionsBlastocystis hominisCefoxitinVancomycinAntacidsRibotypingDyspepsiaLiver Abscess, AmebicBulgariaIodoquinolLansoprazoleAdministration, IntravaginalProspective StudiesFusobacteriumDrug Administration ScheduleFusobacterium InfectionsDrug Combinations