Giardia lambliaGiardiasisGiardiaTrophozoitesIntestinal Diseases, ParasiticProtozoan InfectionsFecesProtozoan ProteinsCryptosporidium parvumAntigens, ProtozoanAntiprotozoal AgentsEntamoeba histolyticaSpores, ProtozoanGiardiavirusDNA, ProtozoanDientamoebaGenome, ProtozoanGerbillinaeEntamoebaMetronidazoleDichlorophenTriose-Phosphate IsomeraseGenes, ProtozoanNitroreductasesTrichomonas vaginalisCryptosporidiosisDientamoebiasisAntigenic VariationPyruvate SynthaseEntamoebiasisOocystsMolecular Sequence DataCryptosporidiumBithionolChild Day Care CentersAntibodies, ProtozoanDiarrheaRNA, ProtozoanTritrichomonasParasitology