Schistosoma intercalatum

Schistosoma intercalatum is a parasitic worm found in parts of western and central Africa. There are two strains: the Lower Guinea strain and the Zaire strain. S. intercalatum is one of the major agents of the rectal form of schistosomiasis, also called bilharzia. It is a trematode, and being part of the Schistosoma genus, it is commonly referred to as a blood-fluke since the adult resides in blood vessels.