Intestinal DiseasesImmunoproliferative Small Intestinal DiseaseEpitheliumMaltaEnteritisMalabsorption SyndromesIntestinal Diseases, ParasiticDiverticulitisImmunoglobulin alpha-ChainsIntestinal MucosaSprue, TropicalIntestine, SmallCrohn DiseaseCampylobacter InfectionsCommunicable DiseasesIntestinesDysenteryFecesInflammatory Bowel DiseasesCeliac DiseaseIntestinal NeoplasmsGastrointestinal DiseasesCaliciviridae InfectionsDiarrheaGastroenteritisNorovirusEnglandCampylobacterEnterocolitis, NecrotizingIleumWalesClostridium difficileJejunumEpithelium, CornealColitis, UlcerativeIntestinal AbsorptionColitisCampylobacter jejuniColonProbioticsSeminiferous EpitheliumEpithelial CellsBiopsyRetinal Pigment EpitheliumDisease Models, AnimalMice, Inbred C57BLPolymerase Chain ReactionIncidenceOlfactory MucosaInfant, NewbornCohort StudiesRespiratory MucosaImmunohistochemistryTracheaCornea