Onchocerciasis in the Amazonian focus of southern Venezuela: altitude and blackfly species composition as predictors of endemicity to select communities for ivermectin control programmes

Vivas-Martinez S, Basáñez MG, Grillet ME, Weiss H, Botto C, García M, Villamizar NJ, Chavasse DC. Onchocerciasis in the Amazonian focus of southern Venezuela: altitude and blackfly species composition as predictors of endemicity to select communities for ivermectin control programmes. Trans R Soc Trop Med Hyg. 1998; 92(6): 613–20.