Trypanosoma brucei rhodesiense and T. brucei gambiense, the ... TLF present in human serum (TLF1 and TLF2) provide innate resistance ... where the parasites are present and it disappears after 2 or 3 weeks. ... to adapt themselves.
In animals it causes animal trypanosomiasis, also called nagana in cattle and horses. T. brucei has traditionally been grouped into three subspecies: T. b. brucei, T. b. gambiense and T. b. rhodesiense.[1] The first is a parasite of non-human vertebrates, while the latter two are the known parasites of humans. Only rarely can the T. b. brucei infect a human