Gastrointestinal DiseasesGastroenterologyEnterocolitis, NecrotizingGastrointestinal TractClostridium perfringensDyspepsiaIrritable Bowel SyndromeFecesDiarrheaProbioticsSan MarinoHelicobacter InfectionsEndoscopy, GastrointestinalPeptic UlcerInflammatory Bowel DiseasesEnterocolitisEnteritisHelicobacter pyloriCrohn DiseaseColonic Diseases, FunctionalGastrointestinal AgentsGastroenteritisCalculiIntestinal DiseasesGastritisCeliac DiseaseClostridium InfectionsStomach DiseasesExocrine Pancreatic InsufficiencyIntestinal MucosaIntubation, GastrointestinalGastrointestinal NeoplasmsTreatment OutcomeDuodenal UlcerFoodborne DiseasesDuodenal DiseasesRetrospective StudiesColitis, UlcerativePancreatic DiseasesIntestinesStomach UlcerGastrointestinal MotilityGastric MucosaCampylobacter jejuniGastric JuicePostoperative ComplicationsDigestive SystemBariatric SurgeryEnterotoxinsProspective StudiesGastroesophageal RefluxClostridium difficileGiardiasisEosinophiliaStomach NeoplasmsCampylobacter InfectionsStomachGeneral SurgeryRisk FactorsDog DiseasesDuodenumLiver DiseasesColonJejunumSensitivity and SpecificityEvaluation Studies as TopicThoracic SurgeryTime FactorsPrevalenceEndoscopyBacterial ToxinsBiopsyCytomegalovirus InfectionsCardiac Surgical ProceduresPolymerase Chain ReactionChronic DiseaseBacterial ProteinsVirulence FactorsCase-Control StudiesQuestionnairesDisease OutbreaksIntestine, SmallIncidenceInfant, NewbornAge FactorsPostoperative PeriodSurgery, PlasticDNA, BacterialWater MicrobiologyAntigens, BacterialIntestinal AbsorptionAnti-Bacterial AgentsPreoperative CareThoracic Surgery, Video-AssistedCataract ExtractionFollow-Up Studies