Trypanosoma vivax, T. congolense or T. brucei infection rates in Glossina morsitans when maintained in vitro on the blood of goat or calf.

Tenerals of Glossina morsitans morsitans and G. m. centralis were infected with Trypanosoma vivax, T. congolense or T. brucei by feeding mainly on infected goats and then maintained either in vivo on uninfected calves, goats or rabbits, or fed in vitro upon heparinised or defibrinated blood of goats or calves for 21 days for T. vivax and T. congolense and 30 days for T. brucei and then dissected. The observed differences in the infection rates for all three trypanosome species maintained on different diets were small and/or inconsistent and possibly are of no significance. It is therefore likely that the in vitro feeding of the tsetse on these diets after infected blood meal has no adverse effect on the cyclical development of these trypanosome species in these vectors.