Trypanosomiasis is a parasitic disease caused by Trypanosoma brucei, which is transmitted to humans and animals by tsetse flies. Some synonyms for trypanosomiasis include African sleeping sickness, African trypanosomiasis, East African sleeping sickness, West African sleeping sickness, and Nagana. These different names are often used to describe the same disease, but they may refer to different regions or types of infection caused by different subspecies of Trypanosoma brucei. The symptoms of trypanosomiasis include fever, headache, joint pain, and enlarged lymph nodes, and can progress to more severe neurological symptoms if left untreated. Treatment typically involves medication to eliminate the parasite from the body.