Schistosoma haematobium is a parasitic worm that causes a disease known as schistosomiasis, primarily affecting the urinary system. It is transmitted through contact with freshwater contaminated by the larvae, which are released by infected freshwater snails. The adult worms reside in the blood vessels of the host, leading to various health issues, including hematuria (blood in urine) and bladder inflammation. This parasite is most commonly found in parts of Africa and the Middle East. Prevention strategies include improving sanitation, providing access to clean water, and educating communities about avoiding contact with contaminated water sources. Treatment typically involves the use of the medication praziquantel.