GastritisGastric MucosaGastritis, AtrophicBacteriaHelicobacter pyloriHelicobacter InfectionsStomach UlcerIntestinal MucosaStomachPyloric AntrumStomach NeoplasmsMetaplasiaStomach DiseasesGastroscopyParietal Cells, GastricGastritis, HypertrophicGastric JuiceMouth MucosaGastrinsGram-Negative BacteriaPepsinogen AGram-Positive BacteriaGastric AcidBile RefluxHelicobacterPepsinogensAchlorhydriaBacterial ProteinsPeptic UlcerBacteria, AnaerobicDuodenal UlcerBiopsyMolecular Sequence DataUreaseAnti-Ulcer AgentsNasal MucosaHelicobacter heilmanniiH(+)-K(+)-Exchanging ATPaseDNA, BacterialHelicobacter felisPrecancerous ConditionsRNA, Ribosomal, 16SPepsinogen CChronic DiseaseChoristomaGastric FundusGastric MucinsDyspepsiaAnemia, PerniciousDuodenitisPhylogenyBacteria, AerobicMucous MembraneCampylobacterEndoscopy, GastrointestinalDuodenumAntigens, BacterialAnti-Bacterial AgentsPostgastrectomy SyndromesImmunohistochemistrySequence Analysis, DNAEscherichia coliOmeprazoleDNA, RibosomalAtrophyEndoscopyHydrochloric AcidMicroscopy, ElectronPolymerase Chain ReactionHydrogen-Ion ConcentrationColony Count, MicrobialBacterial AdhesionPentagastrinDuodenogastric RefluxAntibodies, BacterialAmoxicillinIntestinesBase SequenceWater MicrobiologyEthanolMucusGenes, BacterialIntrinsic FactorGram-Negative Anaerobic BacteriaEndoscopy, Digestive SystemTime FactorsGastric Acidity DeterminationAmino Acid SequenceSpecies SpecificityRNA, MessengerColonBacterial Physiological PhenomenaPylorusGram-Negative Aerobic BacteriaCimetidineEpithelial CellsRats, WistarGene Expression Regulation, BacterialIndomethacinMucins