The symptoms of the sleeping sickness occur in two stages. The haemolymphatic phase is categorized by fever, headaches, joint pains, itching, and swelling of the lymph nodes. The second phase is the neurological phase. The parasite invades the central nervous system by passing the blood-brain barrier. Confusion, reduced coordination, disruption of the sleep cycle causing daytime slumber and night-time insomnia are common symptoms in this phase. If this disease is not treated, then it can be fatal. The damage is irreversible when in the neurological phase.
Tsetse Fly |