Take a look at this encyclopedia entry about the three kinds of blood flukes found in tropical environments and the disease they cause.

Traveller-directed health advice regarding the transmission of schistosomiasis and the geographical areas of risk.

Has research and information from Cambridge University doctors. Includes details of the parasites' lifecycle and their adverse effects on humans.

Center for Disease Control provides a thorough discussion of the spread and symptoms of schistosomiasis. Also covers prevention and treatment.

World Health Organization's assessment of schistosomiasis control and distribution worldwide. Offers a short history of the illness.