Helicobacter pyloriHelicobacter InfectionsStomachBacteriaGram-Negative BacteriaGastritisGram-Positive BacteriaGastric MucosaBacterial ProteinsUreaseBacteria, AnaerobicDNA, BacterialPylorusMolecular Sequence DataAnti-Bacterial AgentsRNA, Ribosomal, 16SPeptic UlcerMetronidazoleClarithromycinAmoxicillinDyspepsiaBacteria, AerobicPhylogenyDuodenal UlcerAnti-Ulcer AgentsEscherichia coliOmeprazoleDNA, RibosomalSequence Analysis, DNAStomach NeoplasmsPyloric AntrumStomach DiseasesAntibodies, BacterialGenes, BacterialWater MicrobiologyGastritis, AtrophicColony Count, MicrobialGene Expression Regulation, BacterialBacterial AdhesionBreath TestsBismuthStomach UlcerBacterial Physiological PhenomenaRNA, BacterialGenome, BacterialGram-Negative Anaerobic BacteriaGram-Negative Aerobic BacteriaCulture MediaGastroscopySoil MicrobiologyPolymerase Chain ReactionAmino Acid SequenceBase SequenceMicrobial Sensitivity TestsSulfur-Reducing BacteriaVirulenceSeawaterSpecies SpecificityDrug Therapy, CombinationBacteriological TechniquesGenes, rRNAAnaerobiosisLansoprazoleSymbiosisPepsinogen AProton Pump InhibitorsMetaplasiaBase CompositionHydrogen-Ion ConcentrationBiopsyTinidazoleLewis Blood-Group SystemBiodegradation, EnvironmentalFecesVirulence FactorsCampylobacterBacterial Typing TechniquesHelicobacterPseudomonasUreaEnterobacteriaceaeMicrobial ViabilityMutationGerbillinaeDuodenitisTetracyclineFresh WaterEndoscopy, GastrointestinalFurazolidoneBacterial InfectionsGammaproteobacteriaAdhesins, BacterialBiofilmsDrug Resistance, MicrobialAntibiosisBacterial Outer Membrane ProteinsRanitidineCloning, MolecularFermentationAerobiosis