Considered a neglected disease, there are two forms of sleeping sickness, caused by two different parasites: Trypanosoma brucei gambiense, which is found in western and central Africa accounts for 98 per cent of cases; Trypanosoma brucei rhodesiense, accounts for less than two percent of cases and is found in eastern and southern Africa. Both parasites are transmitted by the bite of the tsetse fly.
The disease causes severe neurological conditions, including poor coordination, confusion, agitation, aggressiveness or disinhibition. The more commonly-known name of the disease, sleeping sickness, derives from the symptom where patients experience an inability to sleep during the night but are often overcome by sleep during the day.
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MSF Field Research
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