GiardiaGiardia lambliaGiardiasisCryptosporidiumTrophozoitesFecesCryptosporidiosisCryptosporidium parvumOocystsProtozoan ProteinsProtozoan InfectionsDNA, ProtozoanMolecular Sequence DataParasitologyRNA, ProtozoanAntigens, ProtozoanAntiprotozoal AgentsDiplomonadidaGenome, ProtozoanGiardiavirusZoonosesEntamoebaSpores, ProtozoanPhylogenyGenes, ProtozoanWater SupplyEntamoeba histolyticaTriose-Phosphate IsomeraseGerbillinaeTrichomonas vaginalisDiarrheaParasite Egg CountWater MicrobiologyEukaryotaMetronidazoleBase SequenceAmino Acid SequenceWater PollutionSequence Analysis, DNASewagePyruvate Synthase