Gastrointestinal DiseasesInflammatory Bowel DiseasesCrohn DiseaseColitis, UlcerativeIrritable Bowel SyndromeIntestinal MucosaGastroenterologyGastrointestinal TractColonGastrointestinal AgentsProbioticsColitisFecesEnterocolitis, NecrotizingDiarrheaIntestinal DiseasesDyspepsiaClostridium perfringensEnterocolitisEndoscopy, GastrointestinalIntestinesEnteritisHelicobacter InfectionsSan MarinoColonic Diseases, FunctionalMesalaminePeptic UlcerHelicobacter pyloriCeliac DiseaseGastroenteritisCalculiDextran SulfateGastritisClostridium InfectionsGastrointestinal MotilityAzathioprineStomach DiseasesExocrine Pancreatic InsufficiencyTrinitrobenzenesulfonic AcidAminosalicylic AcidsGastrointestinal NeoplasmsIntubation, Gastrointestinal6-MercaptopurineDuodenal DiseasesSulfasalazineFoodborne DiseasesDuodenal UlcerCase-Control StudiesDigestive SystemIleitisGastric MucosaShort Bowel SyndromeBiopsyPancreatic DiseasesStomach UlcerClostridium difficileJejunumCampylobacter jejuniGastric JuiceEnterotoxinsNod2 Signaling Adaptor ProteinEosinophiliaCampylobacter InfectionsDisease Models, AnimalDuodenumChronic DiseaseRetrospective StudiesGiardiasisPrevalenceEndoscopyRisk FactorsGastroesophageal RefluxRectumLiver DiseasesPolymerase Chain ReactionPyoderma GangrenosumSensitivity and SpecificityStomach NeoplasmsStomachDog DiseasesProspective StudiesIleumIntestine, SmallIntestine, LargeTreatment OutcomeColonoscopyBacterial ToxinsCytomegalovirus InfectionsAnti-Inflammatory AgentsEvaluation Studies as TopicQuestionnairesIntestinal AbsorptionAnti-Inflammatory Agents, Non-SteroidalGenotypeIncidenceBacterial ProteinsImmunosuppressive AgentsLeukocyte L1 Antigen ComplexColonic DiseasesAntigens, Bacterial