<human>:  Where is the disease River blindness found?
<bot>: River blindness is a parasitic disease that is spread by the tsetse fly. It is found in Africa and parts of South America. The disease is caused by a parasite called Trypanosoma brucei. The disease is spread by the tsetse fly, which is a fly that lives in the African savannah. The fly bites people and then the parasite is transmitted to the person's bloodstream.