[The campaign against schistosomiasis]

Like other diseases linked to environment from where men look for supplies of goods, schistosomiases are difficult to control. Means of control are existing (mass treatment, selective treatment, with well tolerated drugs) but to insure the decrease of the prevalence over a long period of time, the strategies are sophisticated and often expensive. Therefore, today the objectives of schistosomiasis control are focused on the prevention and decrease of morbidity rather than on the decrease of transmission. Especially so when the economic, social and cultural levels do not permit to avoid the "pathogenic" behaviours.