Malaria is caused by parasitic protozoans of the genus Plasmodium.
African sleeping sickness is caused by Trypanosoma brucei, and its relative, Trypanosoma cruzi, causes Chagas disease.
Giardiasis (beaver fever) is caused by Giardia intestinalis.
Amoebic dysentery is caused by amoebae such as Entamoeba histolytica.
Toxoplasmosis is caused by Toxoplasma gondii.
The amoeba Balamuthia can cause P.A.M., a very rare but almost always fatal encephalitis.
Trypanosomiasis- Chagas Disease
Malaria is one of the diseases caused by protists. Giardia, Pneumonia, and Plasmodium are a few more protist caused diseases.