CryptosporidiosisIntestinal DiseasesImmunoproliferative Small Intestinal DiseaseCryptosporidiumCryptosporidium parvumMaltaFecesDiarrheaEnteritisIntestinal Diseases, ParasiticMalabsorption SyndromesCoccidiaDiverticulitisImmunoglobulin alpha-ChainsSwimming PoolsSprue, TropicalIntestinal MucosaWater SupplyIntestine, SmallCampylobacter InfectionsCrohn DiseaseParomomycinCommunicable DiseasesDisease OutbreaksOocystsIntestinesDysenteryEnglandCeliac DiseaseInflammatory Bowel DiseasesGastroenteritisWalesIntestinal NeoplasmsGiardiasisAIDS-Related Opportunistic InfectionsDNA, ProtozoanCaliciviridae InfectionsIleumGastrointestinal DiseasesLung Diseases, ParasiticAmebicidesRecreationNorovirusCoccidiostatsJejunumAntiparasitic AgentsCampylobacterRNA, Ribosomal, 18SEnterocolitis, NecrotizingParasite Egg CountClostridium difficileWater PollutionWater MicrobiologyColitis, UlcerativeCampylobacter jejuniSeasonsIntestinal AbsorptionColitisInfant, NewbornZoonosesWater PurificationCoccidiosisCyclosporaIncidenceAntibodies, ProtozoanEnterocytozoonProbioticsPolymerase Chain ReactionWaterDrinking WaterColonHealth ResortsIsosporaCyclosporiasisAntigens, ProtozoanWisconsinImmunocompromised HostFood ParasitologyImmunocompetenceFresh WaterSchools, VeterinaryHaitiCohort StudiesPopulation SurveillanceBiopsyAcquired Immunodeficiency SyndromeCattle DiseasesWyomingDisease Models, AnimalRain