Giardia lambliaGiardiaGiardiasisOocystsCryptosporidium parvumCryptosporidiumCryptosporidiosisProtozoan InfectionsCoccidiaEimeriaProtozoan ProteinsDNA, ProtozoanFecesCoccidiosisEukaryotaRNA, ProtozoanParasitologyIsosporaParasite Egg CountGenes, ProtozoanTrophozoitesCiliophoraGenome, ProtozoanWater SupplyCyclosporaAntigens, ProtozoanProtozoan Infections, AnimalSpores, ProtozoanAntiprotozoal AgentsEntamoeba histolyticaToxoplasmaAntibodies, ProtozoanWaterApicomplexaEucoccidiidaFiltrationWater PurificationFresh Water