Schistosomiasis control: an estimation of costs.

Costs are estimated for different types of schistosomiasis control programmes. From the point of view of feasibility and financing, schistosomiasis has been classified into four levels, representing different rates of prevalence, intensity of infection and the rate of reinfection. The different possibilities of approach and their financial aspects are discussed. Costs are estimated for a period of five years. Costs for sanitation and snail control programmes are not included, as they may vary greatly according to local conditions and circumstances and valid generalizations cannot be made.