Schistosomiasis /ˌʃistəsɵˈmaɪəsəs/ (also known as bilharzia, snail fever, and Katayama fever) is a disease caused by parasitic worms of the Schistosoma type. It may infect the urinary tract or intestines. Symptoms may include abdominal pain, diarrhea, bloody stool, or blood in the urine. In those who have been infected a long time, liver damage, kidney failure, infertility, or bladder cancer may occur. In children it may cause poor growth and learning difficulty