A young man is experiencing fever and severe headaches, and is having difficulty staying awake. He reports having spent time in Africa on a missionary trip several months ago. Recently he spent time in a park where he went swimming in the lake and was bitten by a bat he attempted to catch. His cerebrospinal fluid is nearly clear, and contains long, slender, mobile cells. This description indicates infection with A) Neisseria meningitidisB) Trypanosoma bruceiC) AcanthamoebaD) rabies virusE) an enterovirus

Trypanosoma brucei is a parasite which belongs to the genus of Trypanosoma. The parasite is distributed by the vector. It causes sleeping sickness in humans. The symptoms associated with the parasite includes the fever, headache, mental confusion, problems in coordination, skin rash, swollen lymph nodes and itching. T. brucei is transmitted by an insect vector to a host mammal.