with the success achieved in the interruption of the transmission of bilharziasis by snail control in most endemic areas of iran, mass-chemotherapy has been used extensively for reducing the number of cases in various villages. niridazol was chosen for this purpose after a screening of several drugs. eight thousand eight .l1undred seventy-four cases in 259 localities were treated from 1966 to t...

Several cases of therapeutic failure of praziquantel used for the treatment of urinary schistosomiasis have been reported. Alternative drugs, like niridazol and metrifonate, have shown a lower therapeutic effect and more side effects than praziquantel. Twenty-six Brazilian military men (median age of 29 years) with a positive urine parasitological exam who were part of a United Nation peace mis...