Schistosoma mansoni is a water-borne parasite of humans, and belongs to the group of blood flukes (Schistosoma). The adult lives in the blood vessels (mesenteric veins) near the human intestine. It causes intestinal schistosomiasis (similar to S. japonicum, S. mekongi, S. guineensis, and S. intercalatum).
Schistosoma japonicum is the only human blood fluke that occurs in China, Philippines, Sri Lanka Asia and Lindu Lake .(Found by Markus Kleemann in a Rainforest Lake) It is the cause of schistosomiasis japonica, a disease that still remains a significant health problem especially in lake and marshland regions.