<Tr> <Th> Frequency </Th> <Td> 11,000 </Td> </Tr> <Tr> <Th> Deaths </Th> <Td> 3,500 </Td> </Tr> <P> African trypanosomiasis, also known as sleeping sickness, is an insect - borne parasitic disease of humans and other animals . It is caused by protozoa of the species Trypanosoma brucei . There are two types that infect humans, Trypanosoma brucei gambiense (TbG) and Trypanosoma brucei rhodesiense (TbR). TbG causes over 98% of reported cases . Both are usually transmitted by the bite of an infected tsetse fly and are most common in rural areas . </P> <P> Initially, in the first stage of the disease, there are fevers, headaches, itchiness and joint pains . This begins one to three weeks after the bite . Weeks to months later the second stage begins with confusion, poor coordination, numbness, and trouble sleeping . Diagnosis is via finding the parasite in a blood smear or in the fluid of a lymph node . A lumbar puncture is often needed to tell the difference between first and second stage disease . </P>

What type of pathogen is african sleeping sickness
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