Warning: Be advised that the images in this story are graphic and may be considered disturbing for some viewers.
Transmitted only by the tsetse fly in rural Africa, the trypanosoma parasite is responsible for sleeping sickness, an endemic disease that affects more than 30,000 people. When the parasite is injected into the bloodstream through a fly bite, it starts reproducing rapidly in the circulatory and lymph systems. At first, symptoms are pretty minimal – fever and itching. But eventually the parasite gets into the central nervous system and things get really crazy. Sufferers get rapid mood swings, intense terror from nowhere and a bizarre disruption of their sleep cycle that has them waking and falling asleep at all hours of the day and night.
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