This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Tsetse fly transmits - \nSelect and explain. \nA. Trypanosoma brucei, B. T. cruzi, C. Kala-azar, D. Oriental sore', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Trypanosoma brucei\n\nIt is the causative organism of sleeping sickness.\nT. brucei gambiense → West African sleeping sickness\nT. brucei rhodesiense → East African sleeping sickness\nDefinitive host → Man\nIntermediate host → Tsetse fly\n\n\nInfective form to men → Metacyclic form (metacyclic trypomastigote)\nHabitat\n\n\n- The reticuloendothelial tissue of lymph node and spleen. - Blood\n- Connective tissue spaces of various organs. - C.S.F.\n- Intercellular spaces in the brain.', 'role': 'assistant'}]