Control (3) Onchocerciasis (3) Protection (3) Afrique de l'Ouest (2) surveillance (2) programme (2) parasite (2) onchocercose (2) insecticide (2) poisson (2) Afrique (2) Monitoring (2) Development (2) Protection (2) Water (2) Valleys (2) Public health (2) Human ecology--Study and teaching (2) Fishes (2) Example (2) Africa, West (2) stress (1) gare (1) fleuve (1) santé publique (1) produit (1) surveillance (1) modèle (1) faune (1) évaluation (1)