GastritisHelicobacter pyloriHelicobacter InfectionsHelicobacterGastritis, AtrophicGastric MucosaStomachUreasePyloric AntrumHelicobacter heilmanniiHelicobacter hepaticusStomach NeoplasmsPeptic UlcerGastroscopyMetaplasiaDyspepsiaPepsinogen AStomach DiseasesStomach UlcerAmoxicillinGastritis, HypertrophicClarithromycinAnti-Ulcer AgentsMetronidazoleOmeprazoleBacterial ProteinsAntigens, BacterialAchlorhydriaGastrinsBismuthPepsinogen CDuodenitisBiopsyAntibodies, BacterialBile RefluxParietal Cells, Gastric2-PyridinylmethylsulfinylbenzimidazolesEndoscopy, GastrointestinalBreath TestsPepsinogensChronic DiseaseAnti-Bacterial AgentsLansoprazoleGastric JuiceProton Pump InhibitorsGastric AcidDNA, BacterialDrug Therapy, CombinationCampylobacterHelicobacter felisDuodenal UlcerPolymerase Chain ReactionPrecancerous ConditionsGerbillinaeAnemia, PerniciousLewis Blood-Group SystemTinidazoleEndoscopyAcinonyxLymphoma, B-Cell, Marginal ZoneEndoscopy, Digestive SystemAntacidsRanitidineCytotoxinsUreaPostgastrectomy SyndromesMolecular Sequence DataAtrophyGastric Acidity DeterminationGastrointestinal DiseasesImmunoglobulin GGastric MucinsH(+)-K(+)-Exchanging ATPaseGastroesophageal RefluxGastric FundusRNA, Ribosomal, 16SRabeprazoleEsophagitisFurazolidoneEnzyme-Linked Immunosorbent AssayPrevalenceHelicobacter mustelaeVirulenceVirulence FactorsEsophagitis, PepticAntitrichomonal AgentsOrganometallic CompoundsDuodenogastric RefluxInterleukin-8Genes, BacterialPenicillinsCampylobacter InfectionsTetracyclineAutoimmune DiseasesDuodenumBacterial AdhesionSequence Analysis, DNAIntrinsic FactorPeptic Ulcer HemorrhageGastrin-Secreting Cells