Helicobacter pyloriHelicobacter InfectionsStomach UlcerHelicobacterGastric MucosaDuodenal UlcerPeptic UlcerGastritisAnti-Ulcer AgentsUreaseClarithromycinAmoxicillinOmeprazoleStomachMetronidazoleDyspepsiaStomach NeoplasmsBismuthPeptic Ulcer HemorrhageStomach DiseasesGastroscopyBacterial ProteinsAnti-Bacterial AgentsGastritis, Atrophic2-PyridinylmethylsulfinylbenzimidazolesPyloric AntrumRanitidineBreath TestsLansoprazoleDrug Therapy, CombinationProton Pump InhibitorsAntigens, BacterialGastric AcidTinidazoleLeg UlcerDisease EradicationAntibodies, BacterialPressure UlcerHelicobacter hepaticusMetaplasiaEndoscopy, GastrointestinalPeptic Ulcer PerforationFurazolidoneAcetic AcidSkin UlcerAntacidsHelicobacter heilmanniiGastric JuiceBiopsyPylorusDuodenitisGastrinsCimetidinePepsinogen ARabeprazoleHistamine H2 AntagonistsUreaGerbillinaeLewis Blood-Group SystemPenicillinsSucralfateDNA, BacterialPolymerase Chain ReactionOrganometallic CompoundsPepsinogensTetracyclineAntitrichomonal AgentsLymphoma, B-Cell, Marginal ZoneAnti-Inflammatory Agents, Non-SteroidalGastrointestinal DiseasesEndoscopy, Digestive SystemSulfoxidesEndoscopyCytotoxinsMolecular Sequence DataFamotidineRecurrenceTreatment OutcomePepsinogen CPoliomyelitisImmunoglobulin GGastroesophageal RefluxChronic DiseaseProspective StudiesBenzimidazolesPrevalenceVirulenceNitroreductasesBuruli UlcerEnzyme-Linked Immunosorbent AssayVirulence FactorsBacterial AdhesionGastric Acidity DeterminationGastric MucinsGenes, BacterialDrug Resistance, BacterialMicrobial Sensitivity TestsWound HealingAchlorhydriaParietal Cells, Gastric