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African Sleeping Sickness

African Trypanosomiasis

Human African trypanosomiasis, sleeping sickness, is a parasitic disease of humans and other animals. Occuring only in 36 sub-Saharan Africa countries, it is caused by protozoa of the species Trypanosoma brucei and transmitted by the tsetse fly. There are two subspecies that infect humans, T.b. gambiense and T.b. rhodesiense, with the former accounting for over 98% of reported cases and the latter accounting for the remainder. Sustained control efforts have lowered the number of new cases reported to 6743 in 2011 and 7197 in 2012 respectively.