The effect of human serum in vitro on Trypanosoma (Trypanozoon) brucei species trypanosomes and its relationship to infectivity in the BIood Incubation lnfectivity test

Abstract

All attempts to identify 1 HH Species trypanosome strains by their sensitivity or resistance to human serum in vitro have so far been unsuccessful. Wet-film exaffiifiltTon of b.rn..and_T..(N±_nnei monas) congolense trypanosome strains, both before and after in vitro incubation in fresh human blood for 5 hour;Tffi°C showed that serum-sensitivity or serum-resistance is not a constant and reproducible property of a trypanosome strain and is totally unrelated to infectivity.