Intestinal DiseasesImmunoproliferative Small Intestinal DiseaseBiopsyMaltaEnteritisMalabsorption SyndromesIntestinal Diseases, ParasiticDiverticulitisImmunoglobulin alpha-ChainsSprue, TropicalIntestinal MucosaIntestine, SmallCrohn DiseaseCampylobacter InfectionsBiopsy, NeedleCommunicable DiseasesIntestinesDysenteryCeliac DiseaseFecesInflammatory Bowel DiseasesIntestinal NeoplasmsGastrointestinal DiseasesCaliciviridae InfectionsDiarrheaGastroenteritisNorovirusEnglandCampylobacterEnterocolitis, NecrotizingWalesClostridium difficileIleumColitis, UlcerativeJejunumCampylobacter jejuniIntestinal AbsorptionColitisProbioticsColonIncidencePolymerase Chain ReactionImage-Guided BiopsyCohort StudiesInfant, NewbornBiopsy, Large-Core NeedleBiopsy, Fine-NeedleDisease Models, AnimalMice, Inbred C57BLSentinel Lymph Node Biopsy