GiardiaGiardia lambliaGiardiasisCryptosporidiumTrophozoitesFecesCryptosporidiosisCryptosporidium parvumOocystsProtozoan ProteinsProtozoan InfectionsDNA, ProtozoanParasitologyAntigens, ProtozoanAntiprotozoal AgentsRNA, ProtozoanZoonosesDiplomonadidaGiardiavirusMolecular Sequence DataGenome, ProtozoanEntamoebaSpores, ProtozoanGenes, ProtozoanTriose-Phosphate IsomeraseGerbillinaeWater SupplyEntamoeba histolyticaParasite Egg CountDiarrheaTrichomonas vaginalisMetronidazolePhylogeny