Infectivity of trypanosomes derived from individual Glossina morsitans Westw.

PREVIOUS studies on the numbers of metacyclic trypanosomes discharged by infected tsetse flies during feeding have been used in visual counting techniques1. In this communication the method described by Lumsden et al.2 for measuring the infectivity of trypanosome suspensions has been applied to the problem, using material derived from two individual Glossina morsitans infected in the laboratory with organisms of the Trypanosoma brucei subgroup.