Intestinal DiseasesImmunoproliferative Small Intestinal DiseaseMaltaEnteritisMalabsorption SyndromesIntestinal Diseases, ParasiticEpidemiologyDiverticulitisImmunoglobulin alpha-ChainsSprue, TropicalIntestinal MucosaCampylobacter InfectionsIntestine, SmallCrohn DiseaseCommunicable DiseasesMolecular EpidemiologyIntestinesFecesDysenteryInflammatory Bowel DiseasesCeliac DiseaseIntestinal NeoplasmsCaliciviridae InfectionsGastrointestinal DiseasesGastroenteritisDiarrheaEnglandNorovirusCampylobacterWalesClostridium difficileEnterocolitis, NecrotizingIleumIncidenceColitis, UlcerativeCampylobacter jejuniIntestinal AbsorptionJejunumColitisProbioticsColonInfant, NewbornBiopsyCohort StudiesPolymerase Chain ReactionSEER ProgramDisease Models, AnimalPrevalenceDisease OutbreaksRisk FactorsUnited StatesMice, Inbred C57BLEpidemiologic MethodsBias (Epidemiology)Population Surveillance