CryptosporidiumCryptosporidium parvumOocystsDisinfectionCryptosporidiosisCoccidiaDisinfectantsGiardiaFecesWater PurificationWater SupplyDNA, ProtozoanEimeriaGiardiasisChlorineRNA, Ribosomal, 18SSterilizationParasitologyChlorine CompoundsParasite Egg CountDental DisinfectantsCoccidiosisTrihalomethanesHand DisinfectionWater MicrobiologyIsosporaEquipment ContaminationCyclosporaGiardia lambliaDiarrheaWaterWater PollutionRNA, ProtozoanFresh WaterFiltrationSodium HypochloriteIodophorsApicomplexaChloraminesCattle DiseasesSwimming PoolsSewageProtozoan InfectionsPeracetic AcidPolymerase Chain ReactionAntibodies, Protozoan2-PropanolCattleProtozoan ProteinsDrinking WaterSporozoitesEndoscopesSoapsIntestinal Diseases, ParasiticFluorescent Antibody Technique, DirectAntigens, ProtozoanHexachloropheneEucoccidiidaCyclosporiasisImmunomagnetic SeparationPovidone-IodineCoccidiostatsPolymorphism, Restriction Fragment LengthAnti-Infective Agents, LocalUnited States Environmental Protection AgencyZoonosesAnimals, WildVirus InactivationGenes, ProtozoanRiversGlutaralSpores, ProtozoanChlorhexidineEquipment ReuseIsosporiasisDNA, RibosomalMicrobial ViabilityGenotypeDisease OutbreaksHalogenationHost-Parasite InteractionsSequence Analysis, DNAFumigationSteamPropidiumMolecular Sequence DataOzoneColony Count, MicrobialToxoplasmaParomomycinDecontaminationStaining and LabelingParasite LoadBenzophenoneidumFood ParasitologyEnterocytozoonEvaluation Studies as TopicWater Pollutants, ChemicalAnimals, DomesticAIDS-Related Opportunistic Infections