TOPICS: Trypanosoma Brucei, parasite, protozoan, african trypanosomiasis, trypanosoma rhodesiense, gambiense, brucei, tse tse flies, red ulcer, bites, antigenic variation, relapsing fevers, slurred speech, coma, death, CNS infection, central nervous system, trypomastigotes, peripheral blood smear, suramin, melarsoprol