[Mass treatment of onchocerciasis in 1996].

Mass treatment of onchocerciasis has changed radically in the last 20 years. With implementation of the Onchocerciasis Control Programme (OCP), use of insecticides to control vector larvae has been effective but has not been extended to all infected areas due to the cost. The consequences of this problem have been lessened thanks to ivermectin, an effective drug that can be administered in a single yearly dose. Although ivermectin does not appear to induce major side-effects, surveillance is necessary after administration in polyparasitized subjects living in zones where loaiasis is present and in hypermicrofilaremic subjects. To assist in the fight against onchocerciasis, ivermectin is distributed free of charge through the Mectizan Foundation by Merck Laboratories. Inexpensive community distribution programs with active participation of the populations at risk have demonstrated their usefulness. The results of mass treatment through the Mectizan Foundation have been excellent. Non-governmental organizations and in particular the Organization for the Prevention of Blindness (OPB) have become increasingly involved in the fight against onchocerciasis. The campaign conducted by the OPB in Mali, Senegal and Guinea illustrate this involvement. The role of non-governmental organizations expanded greatly with the implementation of the APOC programme supported by the World Bank.