Helicobacter pyloriGastritisHelicobacter InfectionsHelicobacterGastritis, AtrophicGastric MucosaUreaseStomachPyloric AntrumPeptic UlcerStomach NeoplasmsDyspepsiaHelicobacter heilmanniiAmoxicillinGastroscopyClarithromycinMetronidazoleStomach DiseasesHelicobacter hepaticusAnti-Ulcer AgentsMetaplasiaOmeprazoleStomach UlcerBacterial ProteinsPepsinogen AGastritis, HypertrophicBismuthGastrinsAntibodies, BacterialDuodenal UlcerAchlorhydriaBreath TestsDuodenitisBiopsyAntigens, BacterialPepsinogen CAnti-Bacterial AgentsEndoscopy, GastrointestinalLansoprazolePylorusPepsinogensProton Pump InhibitorsParietal Cells, GastricDrug Therapy, CombinationGastric JuiceChronic DiseaseGastric AcidBile RefluxGerbillinaeDNA, BacterialCampylobacterTinidazoleLewis Blood-Group SystemPolymerase Chain Reaction2-PyridinylmethylsulfinylbenzimidazolesRanitidineUreaHelicobacter felisAntacidsLymphoma, B-Cell, Marginal ZonePrecancerous ConditionsCytotoxinsEndoscopyEndoscopy, Digestive SystemMolecular Sequence DataFurazolidoneImmunoglobulin GAnemia, PerniciousGastrointestinal DiseasesGastric MucinsGastric Acidity DeterminationGastroesophageal RefluxAcinonyxAntitrichomonal AgentsTetracyclineAtrophyEsophagitisOrganometallic CompoundsGastric FundusEnzyme-Linked Immunosorbent AssayVirulencePrevalencePenicillinsBacterial AdhesionVirulence FactorsGenes, BacterialPostgastrectomy SyndromesEsophagitis, PepticH(+)-K(+)-Exchanging ATPaseInterleukin-8DuodenumAzure StainsRNA, Ribosomal, 16SPeptic Ulcer HemorrhageCampylobacter InfectionsEpithelial CellsSensitivity and SpecificityAntigens, CD15NitroreductasesColony Count, Microbial