Helicobacter pyloriHelicobacter InfectionsHelicobacterGastritisGastric MucosaUreasePeptic UlcerClarithromycinMetronidazoleStomachAmoxicillinDyspepsiaAnti-Ulcer AgentsBacterial ProteinsOmeprazoleStomach NeoplasmsStomach DiseasesGastritis, AtrophicIncidenceBismuthPyloric AntrumDuodenal UlcerAntigens, BacterialBreath TestsStomach UlcerAnti-Bacterial AgentsHelicobacter hepaticusGastroscopyAntibodies, BacterialHelicobacter heilmanniiLansoprazole2-PyridinylmethylsulfinylbenzimidazolesDrug Therapy, CombinationProton Pump InhibitorsTinidazoleMetaplasiaLewis Blood-Group SystemPepsinogen ABiopsyRanitidineUreaDNA, BacterialEndoscopy, GastrointestinalDuodenitisFurazolidoneGerbillinaePolymerase Chain ReactionCytotoxinsMolecular Sequence DataGastrinsGastric AcidLymphoma, B-Cell, Marginal ZonePepsinogensAntacidsTetracyclinePepsinogen CAntitrichomonal AgentsNitroreductasesImmunoglobulin GPenicillinsPylorusRabeprazolePrevalenceVirulenceGenes, BacterialBacterial AdhesionVirulence FactorsGastric MucinsGastric JuiceOrganometallic CompoundsProspective StudiesEndoscopy, Digestive SystemSulfoxidesGastrointestinal DiseasesSeroepidemiologic StudiesEnzyme-Linked Immunosorbent AssayRisk FactorsAntigens, CD15Sensitivity and SpecificityAchlorhydriaParietal Cells, GastricAdhesins, BacterialGastroesophageal RefluxMicrobial Sensitivity TestsPeptic Ulcer HemorrhageGenomic IslandsEpithelial CellsGene Expression Regulation, BacterialDrug Resistance, BacterialTreatment OutcomeInterleukin-8FecesGenotypeChronic DiseaseBase SequenceRNA, Ribosomal, 23SAzure StainsEndoscopyGenome, BacterialCampylobacter