[Vectorial competence of non-teneral Glossina morsitans morsitans (Mall strain) flies infected by Trypanosoma (Nannomonas) congolense IL 1180].

Non-teneral tsetse flies of Glossina morsitans morsitans (strain Mall) about 16 days old were fed, once, on a rat infected by Trypanosoma congolense IL 1180. The global vectorial competence (VC) of these flies was appraised at 0.1035. VC in males was more important than for females. Infection by mesoprocyclic index was greater in female flies than in male ones, whereas for metacyclic index the reverse was true. This work shows that the age limits, but does not impede metacyclogenesis of non-teneral tsetse flies of G. m. morsitans (strain Mall).