Table 1.

Schistosoma species and their geographic distribution.

Schistosoma name	First intermediate host	Endemic Area
Schistosoma guineensis	Bulinus forskalii	West Africa
Schistosoma intercalatum	Bulinus spp	Africa
Schistosoma haematobium	Bulinus spp.	Africa, Middle East
Schistosoma japonicun	Oncomelania spp.	China, East Asia, Philippines
Schistosoma malayensis	Not known	South East Asia
Schistosoma mansoni	Biomphalaria spp.	Africa, South America, Caribbean, Middle East
Schistosoma mekongi	Neotricula aperta	South East Asia