Tse-tse fly transmits -

Ans. is 'a' i.e., Trypanosoma brucei Trvpanosoma brucei . It is the causative organism of sleeping sickness. . T. brucei gambiense West African sleeping sickness . T. brucei rhodesiense East African sleeping sickness . Definitive host Man Intermediate host --> Tsetse fly . Infective form to men --> Metacyclic form (metacyclic trypomastigote) . Habitat - Reticuloendothelial tissue of lymphnode and spleen. - Blood - Connective tissue spaces of various organs. - C.S.F. - Intercellular spaces in the brain.