Stock Photo: SCHISTOSOMA MANSONI. SCHISTOSOMA MANSONI Schistosoma mansoni is a blood fluke belonging o the genus of trematode parasites. Schistosomiasis, also called bilharziasis, is a serious public health problem in developing countries, affecting several million persons. The disease is transmitted by water contaminated with schistosoma larvae. The flukes can measure several millimeters and live up to 15 years. Flukes are found in pairs in the veins of the abdomen, liver, intestine, spleen and rectum. T