Helicobacter felisHelicobacter InfectionsHelicobacterHelicobacter pyloriGastritisGastric MucosaUreaseHelicobacter heilmanniiStomachStomach NeoplasmsMice, Inbred C57BLMice, KnockoutHelicobacter hepaticusPeptic UlcerClarithromycinMetronidazoleAmoxicillinBacterial ProteinsDyspepsiaAnti-Ulcer AgentsOmeprazoleAntigens, BacterialStomach DiseasesGastritis, AtrophicBismuthPyloric AntrumStomach UlcerBreath TestsAnti-Bacterial Agents2-PyridinylmethylsulfinylbenzimidazolesAntibodies, BacterialGastroscopyDNA, BacterialLansoprazolePolymerase Chain ReactionMolecular Sequence DataProton Pump InhibitorsDrug Therapy, CombinationMetaplasiaBiopsyVirulenceLewis Blood-Group SystemTinidazoleGerbillinaePepsinogen A