Current Research in Social Psychology (CRISP) is a peer reviewed, electronic journal publishing theoretically driven, empirical research in major areas of social psychology.
1 Leishmaniasis, caused by the leishmania genus of protists, and transmitted by the African sand fly;  Toxoplasmosis, caused by Toxoplasma gondii, and transmitted from contaminated animal meat or contaminated feces of infected animals;
Lesson Summary. 1  Most protist diseases in humans are caused by protozoa. 2  Protozoa make humans sick when they become human parasites. 3  Trypanosoma protozoa cause Chagas disease and sleeping sickness. 4  Giardia protozoa cause giardiasis, and Plasmodium protozoa cause malaria.rypanosoma Protozoa. Members of the genus Trypanosoma are flagellate protozoa that cause sleeping sickness, which is common in Africa. They also cause Chagas disease, which is common in South America. The parasites are spread by insect vectors.