[Perspectives of the use of Echinostoma togoensis Jourdane et Kulo, 1981 for biological control of intestinal schistosomiasis in Africa].

A study of the experimental development of E. togoensis Jourdane et Kulo, 1981 in its successive hosts has allowed us to show that this species combines several characteristics considered to be essential with a view to biological control of intestinal schistosomiasis: --a complete and permanent sterilizing effect of Biomphalaria pfeifferi; --a pathogenicity with respect to the mollusc in infestations with more than 5 miracidia; --a very clear dominance of intramolluscal stages of Schistosoma mansoni; --ease and low cost of cycle maintenance (the parasite develops in two common hosts: the planorb and the mouse; --a high egg productivity in the mouse (10 mice infected with 75 metacercariea produce on average 620.000 eggs per day.