[Control of vectors by trapping and its impact on sleeping sickness in a zone of high density of Glossina fuscipes quanzensis (Lefini River, People's Republic of the Congo)].

Tsetse control by trapping and its impact on the transmission of sleeping sickness in the high density area of Glossina fuscipes quanzenis (Léfini river, People's republic of Congo). The focus of human sleeping sickness of the Léfini river is of strategic importance for the People's Republic of Congo as it is located at an important junction which allows the trypanosomiasis to spread over the whole country. A campaign of tsetse control by trapping was undertaken in this focus, where an adjacent game reserve provides a continuous source of flies. The only practicable strategy was the use of a new model of trap with a permanent "killing cage" and which does not need to be impregnated with an insecticide. Transmission of sleeping sickness has been reduced by 1) decreasing the density of flies which are in close contact with man, 2) constantly eliminating flies likely to become infected and transmit the disease.