Schistosomiasis

**Definition:** An infestation caused by helminths of the genus Schistosoma. The clinical features vary according to the species involved but the principal organs affected are the gastrointestinal tract and bladder.

**Long definition:** A blood fluke (trematode) infection with adult male and female worms living within mesenteric or vesical veins of the host over a life span of many years. Eggs produce minute granulomata and scars in organs where they lodge or are deposited.

**Inclusions:** - snail fever