Helicobacter pyloriHelicobacter InfectionsGastric AcidOmeprazoleAnti-Ulcer AgentsAmoxicillinClarithromycinGastric Mucosa2-PyridinylmethylsulfinylbenzimidazolesBismuthMetronidazoleDuodenal UlcerLansoprazolePentagastrinTinidazoleProton Pump InhibitorsGastrinsBicarbonatesGastritisPeptic UlcerGastric JuiceRanitidineDrug Therapy, CombinationDyspepsiaAnti-Bacterial AgentsStomachRabeprazoleFurazolidoneAntacidsParietal Cells, GastricStomach UlcerHelicobacterHistamine H2 AntagonistsBreath TestsSulfoxidesAntitrichomonal AgentsUreaseStomach NeoplasmsBethanechol CompoundsPyloric AntrumGastroscopyPenicillinsGastric Acidity DeterminationAchlorhydriaBenzimidazolesSodium BicarbonateSecretory RateHistamineGastritis, AtrophicLymphoma, B-Cell, Marginal ZoneCimetidinePeptonesEsophagitis, PepticGastroesophageal RefluxTetracyclineAminopyrineStomach DiseasesH(+)-K(+)-Exchanging ATPaseMetaplasiaVagotomyUreaFamotidineTreatment OutcomeEsomeprazoleEndoscopy, GastrointestinalMetiamideTetragastrinDuodenitisGastric FistulaOrganometallic CompoundsBacterial ProteinsLevofloxacinEsophagitisHydrogen-Ion ConcentrationVagotomy, Proximal GastricNifuratelYogurtProspective StudiesVagus NerveBethanecholAnti-Infective AgentsDisease EradicationOfloxacinPylorusSomatostatinPepsinogen ADrug Administration ScheduleAntigens, BacterialDanazolEndoscopyRifabutinSecretinEnterochromaffin-like CellsGastric EmptyingDuodenumHydrochloric AcidTreatment FailureBenzoxepinsPepsinogensDrug Resistance, Bacterial