Helicobacter pyloriBreath TestsHelicobacter InfectionsUreaUreaseGastritisHelicobacterClarithromycinDyspepsiaAmoxicillinAnti-Ulcer AgentsPeptic UlcerOmeprazoleMetronidazoleGastric Mucosa2-PyridinylmethylsulfinylbenzimidazolesLansoprazoleStomachCarbon IsotopesTinidazoleDuodenal UlcerAnti-Bacterial AgentsGastroscopyDrug Therapy, CombinationProton Pump InhibitorsBismuthAntitrichomonal AgentsStomach UlcerEndoscopy, GastrointestinalAntigens, BacterialCarbon RadioisotopesRanitidineSulfoxidesBacterial ProteinsRabeprazoleGastritis, AtrophicStomach NeoplasmsSensitivity and SpecificityAntibodies, BacterialFalse Negative ReactionsStomach DiseasesEsomeprazoleBiopsyFurazolidoneFecesPyloric AntrumGastric EmptyingHelicobacter hepaticusLactuloseOrganometallic CompoundsHelicobacter heilmanniiProspective StudiesAminopyrineLewis Blood-Group SystemMetaplasiaTreatment OutcomePepsinogen ADNA, BacterialCaprylatesAntacidsDuodenitisGerbillinaeHydrogenTetracyclinePolymerase Chain ReactionGastric AcidPredictive Value of TestsLactose IntoleranceCytotoxinsPenicillinsMolecular Sequence DataGastrinsAchlorhydriaLymphoma, B-Cell, Marginal ZonePepsinogensExhalationGastrointestinal DiseasesPepsinogen CCarbon DioxideImmunoglobulin GDrug Administration SchedulePeptic Ulcer HemorrhageNitroreductasesBenzimidazolesPylorusGenes, BacterialVirulenceBacterial AdhesionVirulence FactorsPrevalenceGastric MucinsGastric JuiceEnzyme-Linked Immunosorbent AssayBlood Urea NitrogenGastroesophageal RefluxEndoscopy, Digestive SystemGastrointestinal TransitMalabsorption SyndromesDrug Resistance, BacterialSerologic Tests