Gastrointestinal DiseasesIntestine, SmallIntestinesGastroenterologyGastrointestinal TractEnterocolitis, NecrotizingIntestine, LargeClostridium perfringensDyspepsiaFecesIrritable Bowel SyndromeDiarrheaIntestinal MucosaProbioticsSan MarinoEnteritisHelicobacter InfectionsEndoscopy, GastrointestinalEnterocolitisInflammatory Bowel DiseasesPeptic UlcerIntestinal DiseasesCrohn DiseaseHelicobacter pyloriColonic Diseases, FunctionalGastroenteritisGastrointestinal AgentsCalculiCeliac DiseaseJejunumGastritisClostridium InfectionsStomach DiseasesExocrine Pancreatic InsufficiencyIntubation, GastrointestinalGastrointestinal MotilityDigestive SystemGastrointestinal NeoplasmsIntestinal AbsorptionDuodenumFoodborne DiseasesDuodenal UlcerColitis, UlcerativeDuodenal DiseasesColonGastric MucosaStomach UlcerPancreatic DiseasesCampylobacter jejuniEnterotoxinsGastric JuiceStomachGiardiasisClostridium difficileEosinophiliaCampylobacter InfectionsGastroesophageal RefluxStomach NeoplasmsDog DiseasesBacterial ToxinsLiver DiseasesPolymerase Chain ReactionEndoscopyEvaluation Studies as TopicBacterial ProteinsCytomegalovirus InfectionsIleumVirulence FactorsBiopsySensitivity and SpecificityPrevalenceMolecular Sequence DataDisease OutbreaksChronic DiseaseDNA, BacterialCase-Control StudiesRetrospective StudiesAntigens, BacterialWater MicrobiologyRisk FactorsInfant, NewbornDogsQuestionnaires