Intestinal DiseasesImmunoproliferative Small Intestinal DiseaseMaltaEnteritisMalabsorption SyndromesIntestinal Diseases, ParasiticDiverticulitisImmunoglobulin alpha-ChainsSprue, TropicalIntestinal MucosaIntestine, SmallCampylobacter InfectionsCrohn DiseaseCommunicable DiseasesIntestinesDysenteryFecesCeliac DiseaseInflammatory Bowel DiseasesIntestinal NeoplasmsGastrointestinal DiseasesCaliciviridae InfectionsGastroenteritisDiarrheaNorovirusEnglandCampylobacterEnterocolitis, NecrotizingWalesClostridium difficileIleumColitis, UlcerativeCampylobacter jejuniIntestinal AbsorptionJejunumColitisProbioticsColonCost of IllnessIncidenceBiopsyBody BurdenInfant, NewbornCohort StudiesDisease Models, AnimalPolymerase Chain ReactionMice, Inbred C57BL