Experiments in the Control of Schistosomiasis in Brazil

Abstract

SCTHISTOSOMIASIS, a disease caused by three species of human blood flukes, Schi8tosoma haematobium, S. mansoni, and S. japonicum, is widely distributed in Africa, the Near East, the Orient, the Caribbean area, and parts of South America.It has been estimated (1) that there are 114,400,000 individuals in the world who are infected with the disease.It usually runs a chronic course, and the patient may suffer for years before finally succumbing to the cumulative damage or intercurrent in- fection.In most endemic areas, natives are