CryptosporidiumCryptosporidium parvumCryptosporidiosisOocystsCoccidiaGiardiaDNA, ProtozoanFecesRNA, Ribosomal, 18SGiardiasisParasitologyGiardia lambliaParasite Egg CountDiarrheaRNA, ProtozoanWater SupplyCyclosporaProtozoan InfectionsApicomplexaCattle DiseasesWaterProtozoan ProteinsWater PollutionPolymerase Chain ReactionIntestinal Diseases, ParasiticCattleAntibodies, ProtozoanWater PurificationPolymorphism, Restriction Fragment LengthZoonosesAntigens, ProtozoanFresh WaterGenes, ProtozoanWater MicrobiologyAnimals, WildCoccidiostatsSporozoitesDNA, RibosomalFluorescent Antibody Technique, DirectCoccidiosisGenotypeIsosporaSequence Analysis, DNASewageEnterocytozoonMolecular Sequence DataImmunomagnetic SeparationFiltrationSwimming PoolsEimeriaParomomycinHost-Parasite InteractionsAIDS-Related Opportunistic InfectionsRiversParasite LoadGenome, ProtozoanCyclosporiasisDisinfectionPhylogenyRecreationMicrosporidiosisAnimals, DomesticAntiprotozoal AgentsSensitivity and SpecificityDisease OutbreaksGenes, rRNAMicrosporidiaAntiparasitic AgentsPrevalencePetsFood ParasitologyIsosporiasisUnited States Environmental Protection AgencyStaining and LabelingFluorescent Antibody TechniqueMicroscopy, Ultraviolet