Helicobacter felisHelicobacter heilmanniiHelicobacterHelicobacter InfectionsHelicobacter pyloriUreaseGastric MucosaRickettsia felisGastritisCat DiseasesStomachCatsFelisDog DiseasesParietal Cells, GastricDNA, BacterialDuodenitisSiphonapteraAntibodies, BacterialDogsStomach NeoplasmsHelicobacter hepaticusCtenocephalidesRNA, Ribosomal, 16SZoonosesPeptic UlcerStomach UlcerMolecular Sequence DataRickettsia InfectionsFlea InfestationsClarithromycinMetronidazoleAmoxicillinBacterial ProteinsDNA, RibosomalPolymerase Chain ReactionMice, Inbred C57BLDyspepsiaStomach DiseasesAnti-Ulcer AgentsAntigens, BacterialOmeprazoleChlamydophila