Helicobacter pyloriHelicobacter InfectionsHelicobacterGastritisGastric MucosaUreaseAntibodiesPeptic UlcerClarithromycinAntibodies, BacterialMetronidazoleStomachAmoxicillinDyspepsiaBacterial ProteinsAnti-Ulcer AgentsOmeprazoleStomach NeoplasmsAntigens, BacterialStomach DiseasesGastritis, AtrophicAntibody SpecificityBismuthPyloric AntrumDuodenal UlcerBreath TestsStomach UlcerAntibodies, ViralAnti-Bacterial AgentsHelicobacter hepaticusGastroscopyAntibodies, MonoclonalHelicobacter heilmanniiLansoprazole2-PyridinylmethylsulfinylbenzimidazolesProton Pump InhibitorsDrug Therapy, CombinationLewis Blood-Group SystemMolecular Sequence DataTinidazoleMetaplasiaPepsinogen ABiopsyAntibody FormationRanitidineUreaAntibodies, NeutralizingDNA, BacterialGerbillinaeEndoscopy, GastrointestinalDuodenitisImmunoglobulin GFurazolidonePolymerase Chain ReactionCytotoxinsGastrinsGastric AcidEnzyme-Linked Immunosorbent AssayLymphoma, B-Cell, Marginal ZonePepsinogensFluorescent Antibody TechniqueAntibody AffinityAntacidsPepsinogen CTetracyclineAmino Acid SequenceSeroepidemiologic StudiesAntitrichomonal AgentsPenicillinsNitroreductasesBacterial AdhesionVirulenceSensitivity and SpecificityGenes, BacterialRabeprazolePylorusVirulence FactorsAntibodies, Anti-IdiotypicBase SequenceGastric MucinsOrganometallic CompoundsGastric JuiceBinding Sites, AntibodySerologic TestsAntigens, CD15EpitopesSulfoxidesEndoscopy, Digestive SystemImmunoglobulin AAdhesins, BacterialPrevalenceGastrointestinal DiseasesParietal Cells, GastricEpithelial CellsAchlorhydriaCross ReactionsHIV AntibodiesInterleukin-8Gastroesophageal RefluxBacterial Vaccines