Control (2) Rivers (2) Onchocerciasis (2) Protection (2) Afrique de l'Ouest (1) surveillance (1) parasite (1) onchocercose (1) invertébré (1) insecticide (1) vecteur (1) substance chimique (1) Afrique (1) Ouest (1) Doors (1) Monitoring (1) Development (1) Variation (1) Treatment (1) Diseases (1) Sustainable development (1) Onchocerca volvulus (1) Protection (1) Simulium damnosum (1) Wrestling (1) World health (1) Water (1) Valleys (1) Success (1) Struggle (1)