about River blindness is a disease that has affected over 18 million people and could affect 127 million more people. River blindness is caused by the bite of a black fly, which is usually found in the river. Black flies menelpel and release larvae of parasites into the skin of a person. As the parasites grow and mature into adults, adults begin to reproduce millions of adult parasite that spreads to the entire body. When the parasite grows, the parasite can grow up to two feet make a terrible round nodules on the skin. As an adult parasites spread throughout the body, began to discolor the skin, which makes it more obvious than blindness. As the spread of parasites can cause skin lesions and severe itching. It will eventually reach the eyes.
