Aspects épidémiologiques et répartition géographique de l'onchocercose en Afrique de l'Ouest francophone

Epidemiological aspects and geographic distribution of river-blindness in French-speaking West Africa.- The disease occurs all over the zone south of 15° N, its repartition following the hydrologic network. Endemicity is in reverse proportion to the demographic importance of villages; there are few urban foci. River-blindness partly explains low human densities in valleys. There is no sure explanation of the higher infection rate in savannah areas since in the forest, etiological factors are the same.