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African lethargy a.k.a. African trypanosomiasis or sleeping sickness is a parasitic disease of humans and other animals. It is caused by protozoa of the species Trypanosoma brucei. There are two types that infect humans, Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense. T.b.g causes over 98% of reported cases. Both are usually transmitted by the bite of an infected tsetse fly and are most common in rural areas.
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A New Medical Dictionary (1890)
by George Milbry Gould
African Lethargy. A “ sleeping sickness " affecting negroes of the West African coast. Increasing somnolence is the characteristic symptom. Very fatal. Death after emaciation follows in from three to six months. The cause is unknown, and ...
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