[An African human trypanosomiasis focus without glossina (author's transl)].

15 cases of human trypanosomiasis are reported. The patients did not travel previously through endemic areas, but all of them have stayed for a long duration in the Ouahigouya district lazaret. Never glossina were found in this district. This is suggesting a non conventional way of contamination, most likely mecanical transmission by hematophagous arthropodes. After COULM and FREZIL, the authors also raise the question of the importance of this possible mode of transmission in sleeping disease epidemiology.