Helicobacter pyloriHelicobacter InfectionsGastritisHelicobacterGastritis, AtrophicBacteriaGastric MucosaUreaseStomachPyloric AntrumHelicobacter heilmanniiHelicobacter hepaticusBacterial ProteinsStomach NeoplasmsPeptic UlcerGastroscopyMetaplasiaDyspepsiaStomach DiseasesPepsinogen AStomach UlcerAmoxicillinGram-Negative BacteriaGastritis, HypertrophicClarithromycinAntigens, BacterialAnti-Ulcer AgentsMetronidazoleGram-Positive BacteriaDNA, BacterialOmeprazoleAnti-Bacterial AgentsRNA, Ribosomal, 16SAchlorhydriaMolecular Sequence DataGastrinsBacteria, AnaerobicAntibodies, BacterialBismuthPepsinogen CDuodenitisBiopsyPhylogenyBile RefluxDNA, RibosomalParietal Cells, Gastric2-PyridinylmethylsulfinylbenzimidazolesPolymerase Chain ReactionSequence Analysis, DNABreath TestsChronic DiseaseEndoscopy, GastrointestinalPepsinogensGastric JuiceLansoprazoleGenes, BacterialBacteria, AerobicCampylobacterProton Pump InhibitorsGastric AcidColony Count, MicrobialEscherichia coliDrug Therapy, CombinationHelicobacter felisBacterial AdhesionDuodenal UlcerGerbillinaePrecancerous ConditionsGene Expression Regulation, BacterialAnemia, PerniciousGenome, BacterialRNA, BacterialBase SequenceLewis Blood-Group SystemTinidazoleVirulenceGram-Negative Anaerobic BacteriaAcinonyxEndoscopyLymphoma, B-Cell, Marginal ZoneCytotoxinsEndoscopy, Digestive SystemSpecies SpecificityAntacids