Helicobacter pyloriHelicobacter InfectionsHelicobacterGastritisGastric MucosaUreasePeptic UlcerClarithromycinMetronidazoleStomachAmoxicillinDyspepsiaAnti-Ulcer AgentsOmeprazoleBacterial ProteinsStomach NeoplasmsStomach DiseasesGastritis, AtrophicBismuthPyloric AntrumAntigens, BacterialDuodenal UlcerBreath TestsStomach UlcerAnti-Bacterial AgentsHelicobacter hepaticusGastroscopyAntibodies, BacterialHelicobacter heilmanniiLansoprazole2-PyridinylmethylsulfinylbenzimidazolesProton Pump InhibitorsDrug Therapy, CombinationTinidazoleLewis Blood-Group SystemMetaplasiaPepsinogen ABiopsyRanitidineUreaDNA, BacterialEndoscopy, GastrointestinalCausalityPolymerase Chain ReactionDuodenitisFurazolidoneGerbillinaeMolecular Sequence DataCytotoxinsGastrinsMendelian Randomization AnalysisGastric AcidLymphoma, B-Cell, Marginal ZonePepsinogensAntacidsTetracyclinePepsinogen CAntitrichomonal AgentsNitroreductasesPenicillinsRabeprazolePylorusImmunoglobulin GRisk FactorsGenes, BacterialVirulenceBacterial AdhesionVirulence FactorsPrevalenceGastric MucinsGastric JuiceOrganometallic CompoundsTime FactorsGenotypeSulfoxidesEndoscopy, Digestive SystemCase-Control StudiesChronic DiseaseBase SequenceGastrointestinal DiseasesEnzyme-Linked Immunosorbent AssayAntigens, CD15Seroepidemiologic StudiesAchlorhydriaParietal Cells, GastricAdhesins, BacterialGastroesophageal RefluxProspective StudiesSensitivity and SpecificityMagicMicrobial Sensitivity TestsGenomic IslandsPeptic Ulcer HemorrhageGene Expression Regulation, BacterialEpithelial CellsInterleukin-8Drug Resistance, BacterialRNA, Ribosomal, 23SAzure StainsGenome, Bacterial