Helicobacter pyloriGastritisHelicobacter InfectionsHelicobacterGastritis, AtrophicGastric MucosaBacteriaUreaseStomachPyloric AntrumPeptic UlcerBacterial ProteinsStomach NeoplasmsDyspepsiaHelicobacter heilmanniiAmoxicillinClarithromycinGastroscopyMetronidazoleStomach DiseasesHelicobacter hepaticusAnti-Ulcer AgentsMetaplasiaStomach UlcerOmeprazolePepsinogen AAnti-Bacterial AgentsDNA, BacterialGastritis, HypertrophicBismuthAntibodies, BacterialGram-Negative BacteriaAntigens, BacterialGram-Positive BacteriaMolecular Sequence DataGastrinsDuodenal UlcerAchlorhydriaBreath TestsBiopsyDuodenitisRNA, Ribosomal, 16SPepsinogen CEndoscopy, GastrointestinalLansoprazoleBacteria, AnaerobicPylorusPolymerase Chain ReactionPepsinogensProton Pump InhibitorsParietal Cells, GastricDrug Therapy, CombinationPhylogenyChronic DiseaseGastric JuiceCampylobacterGastric AcidSequence Analysis, DNABile RefluxGerbillinaeDNA, RibosomalGenes, BacterialLewis Blood-Group SystemTinidazole2-PyridinylmethylsulfinylbenzimidazolesBacterial AdhesionColony Count, MicrobialUreaRanitidineHelicobacter felisAntacidsCytotoxinsLymphoma, B-Cell, Marginal ZoneGene Expression Regulation, BacterialVirulencePrecancerous ConditionsEscherichia coliGenome, BacterialEndoscopyBacteria, AerobicEndoscopy, Digestive SystemBase SequenceImmunoglobulin GRNA, BacterialVirulence FactorsFurazolidoneGastrointestinal DiseasesMicrobial Sensitivity TestsAnemia, PerniciousFecesAmino Acid SequenceGastric MucinsTetracyclineSpecies SpecificityGastric Acidity DeterminationAcinonyxGastroesophageal RefluxPenicillinsHydrogen-Ion ConcentrationEnzyme-Linked Immunosorbent Assay