Helicobacter felisHelicobacter InfectionsHelicobacterHelicobacter pyloriGastritisGastric MucosaUreaseHelicobacter heilmanniiStomachStomach NeoplasmsMice, Inbred C57BLMice, KnockoutHelicobacter hepaticusPeptic UlcerClarithromycinMetronidazoleAmoxicillinBacterial ProteinsDyspepsiaSensitivity and SpecificityAnti-Ulcer AgentsOmeprazoleAntigens, BacterialPolymerase Chain ReactionStomach DiseasesGastritis, AtrophicBismuthDNA, BacterialPyloric AntrumStomach UlcerBreath TestsAnti-Bacterial AgentsAntibodies, BacterialLimit of Detection2-PyridinylmethylsulfinylbenzimidazolesGastroscopyMolecular Sequence DataLansoprazoleProton Pump InhibitorsBiopsyDrug Therapy, CombinationMetaplasiaEnzyme-Linked Immunosorbent AssayLewis Blood-Group SystemTinidazolePepsinogen AGerbillinaeFecesRNA, Ribosomal, 16SUrea