Trypanosoma brucei has been found throughout sub-Saharan Africa
and comprises three morphologically identical but genetically
different subspecies, specifically Trypanosoma brucei brucei, Trypanosoma
brucei rhodesiense, and Trypanosoma brucei gambiense
(Tait et al., 2011), and Trypanosoma brucei evansi (Lai et al., 2008).