GastritisHelicobacter pyloriHelicobacter InfectionsParietal Cells, GastricGastritis, AtrophicH(+)-K(+)-Exchanging ATPaseAutoimmune DiseasesThymectomyHelicobacterGastric MucosaAnemia, PerniciousGastrinsAchlorhydriaStomachIntrinsic FactorAutoantibodiesMice, Inbred BALB CAutoantigensUreaseLymphopeniaPyloric AntrumHelicobacter heilmanniiHelicobacter hepaticusStomach NeoplasmsPeptic UlcerGastroscopyMetaplasiaDyspepsiaPepsinogen AStomach DiseasesStomach UlcerAmoxicillinGastritis, HypertrophicClarithromycinAnti-Ulcer AgentsCD4-Positive T-LymphocytesImmunoglobulin GMetronidazoleOmeprazoleBacterial ProteinsAntigens, BacterialT-Lymphocytes, RegulatoryBismuthPepsinogen CDuodenitisBiopsyDisease Models, AnimalMice, Inbred C57BLAntibodies, BacterialBile Reflux2-PyridinylmethylsulfinylbenzimidazolesEndoscopy, GastrointestinalBreath TestsPepsinogensChronic DiseaseAnti-Bacterial AgentsLansoprazoleGastric JuiceProton Pump InhibitorsGastric AcidDNA, BacterialDrug Therapy, CombinationCampylobacterHelicobacter felisDuodenal UlcerPolymerase Chain ReactionPrecancerous ConditionsGerbillinaeLewis Blood-Group SystemTinidazoleEndoscopyAcinonyxLymphoma, B-Cell, Marginal ZoneEndoscopy, Digestive SystemAntacidsRanitidineCytotoxinsUreaPostgastrectomy SyndromesMolecular Sequence DataAtrophyGastric Acidity DeterminationGastrointestinal DiseasesGastric MucinsGastroesophageal RefluxGastric FundusRNA, Ribosomal, 16SRabeprazoleEsophagitis