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Table 2 Characteristics of subspecies and subgroups within Trypanosoma brucei See text for explanation

From: Species concepts for trypanosomes: from morphological to molecular definitions?

Subspecies Distribution Host range Transmission Growth in rodents Genetic variability Presence of SRA gene
Trypanosoma brucei brucei Tropical Africa Wild & domestic mammals, not humans Tsetse Fast +++ -
Trypanosoma brucei rhodesiense East Africa Humans, wild & domestic mammals Morsitans group tsetse Fast ++ +
Trypanosoma brucei gambiense Group 1 West & Central Africa Humans, wild & domestic mammals Palpalis group tsetse Slow + -
Trypanosoma brucei gambiense Group 2 Ivory Coast Humans, wild & domestic mammals Palpalis or morsitans group tsetse? Fast ++ -