BiopsyHelicobacter pyloriGastritisHelicobacter InfectionsStomachGastric MucosaUreaseGastroscopyPyloric AntrumStomach DiseasesDyspepsiaClarithromycinBiopsy, NeedleGastritis, AtrophicStomach NeoplasmsMetaplasiaStomach UlcerPolymerase Chain ReactionGastroscopesAntigens, BacterialHelicobacterPeptic UlcerCampylobacterAzure StainsEndoscopy, Digestive SystemSensitivity and SpecificityDuodenal UlcerBacterial ProteinsRNA, Ribosomal, 23SEndoscopy, GastrointestinalDNA, BacterialHelicobacter heilmanniiAnti-Bacterial AgentsGastric JuiceAmoxicillinAnti-Ulcer AgentsDental PlaquePrecancerous ConditionsOmeprazoleParaffin EmbeddingBacteriological TechniquesDNA, RibosomalMetronidazoleEndoscopyDrug Resistance, BacterialColombiaLymphoma, B-Cell, Marginal ZoneRNA, Ribosomal, 16SBreath TestsGenotypeImage-Guided BiopsyChronic DiseaseDuodenumImmunohistochemistryBiopsy, Large-Core NeedleAtrophyGastrinsBiopsy, Fine-NeedleVirulence FactorsCulture MediaSalivaProspective StudiesPolymorphism, Restriction Fragment LengthEvaluation Studies as TopicBase SequencePredictive Value of TestsAntibodies, BacterialRetrospective StudiesVirulenceMicrobial Sensitivity TestsUreaMolecular Sequence DataGenes, BacterialSentinel Lymph Node BiopsyDNA PrimersBacterial Typing TechniquesRNA, BacterialEnzyme-Linked Immunosorbent AssayDrug Therapy, CombinationSequence Analysis, DNACase-Control StudiesPrevalenceRisk FactorsVacuumProstateProstatic NeoplasmsFalse Negative ReactionsBronchoscopySkinRectumStereotaxic TechniquesCeliac DiseaseBreast NeoplasmsTomography, X-Ray ComputedGraft RejectionIntestinal MucosaReproducibility of ResultsBreastProstate-Specific Antigen