[Impact of the hydraulic structures development on the bilharziosis (schistosomiasis)]

ciclo vital control de enfermedades disease control disease transmission enfermedades transmitidas vectores esquistosomosis gastropoda genre humain higiene hosts hygiene irrigation systems life cycle maladie transmise par vecteur mankind schistosoma schistosomiasis schistosomose sistemas de riego transmission des maladies tropical zones vectorborne diseases zona tropical zone tropicale