Schistosomiasis or bilharzia is a parasitic disease caused by several species of flatworm. The acute form of schistosomiasis is sometimes known as snail fever and cutaneous schistosomiasis is sometimes commonly called swimmer’s itch. The disease affects many people in developing countries, and in certain African communities the process of overcoming schistosomiasis is an important rite of passage. Although it has a low mortality rate, schistosomiasis can be very debilitating. Schistosomiasis is known as Bilharzia or bilharziosis in many countries, after Theodor Bilharz, who first described the cause of urinary schistosomiasis in 1851.

An often chronic illness that results from infection of the blood with a parasitic flatworm (schistosome). It causes debilitation and causes liver and intestinal damage. It is most commonly found in Asia, Africa, and South America, especially in areas with water that is contaminated with fresh water snails, which contain the parasite