Schistosomiasis is an acute and chronic, parasitic disease caused by blood flukes (trematode worms) of the genus Schistosoma. At least 258 million people required treatment in 2014. Treatment, which should be repeated over a number of years, will reduce and prevent morbidity. The WHO strategy for schistosomiasis control focuses o­n reducing disease through periodic, targeted treatment with praziquantel. This involves regular treatment of all who are at-risk.

Fact 1: More people need treatment for schistosomiasis

At least 258 million people are estimated to have required treatment for schistosomiasis in 2014. While the actual reported number of people treated in 2014 was o­nly 61.6 million.

Fact 2: Infection occurs from exposure to infested freshwater

People can become infected during routine agricultural, domestic, occupational and recreational activities which expose them to infested freshwater sources.

WHO/L. Chitsulo

Fact 4: Schistosomiasis is prevalent in tropical and subtropical areas

Schistosomiasis is especially prevalent in poor communities with unsafe drinking-water sources and inadequate sanitation. It is estimated that at least 90% of those requiring treatment for schistosomiasis live in Africa.

WHO/L. Chitsulo

Fact 5: Increased population movement is introducing the disease to new areas

Increased migration to urban areas and population movements are introducing schistosomiasis to new areas. Increasing population size and the corresponding needs for power and water often result in development schemes and environmental modification, such as construction of dams, that facilitate transmission.

WHO/L. Chitsulo

Other news »

---

• WHO's update on Dracunculiasis (guinea-worm disease), May 2016 (06/02/2016)
• Updated information about Schistosomiasis (03/01/2016)
• Intestinal helminth infections and these diseases control activities in Vietnam (08/27/2015)
• Deworming campaign improves child health, school attendance in Rwanda (07/20/2015)
• Tapeworm found living inside a patient (12/08/2014)