Glossina, the tsetse flies, are vectors of African trypanosomes, which are of medical and veterinary importance. Glossina morsitans distribution is not accurately known in all countries. The subspecies G. morsitans submorsitans extends as a very large but broken belt throughout West Africa, into southern Sudan, northern Uganda.and Ethiopia. Very large belts of G. morsitans centralis occur in Zaire, Zambia, Angola, Botswana, Tanzania, Rwanda and Burundi; belts of G. morsitans morsitans occur in Tanzania, Mozambique, Zimbabwe, Zambia and Malawi. The boundary separating the two subspecies G. morsitans centralis and G. morsitans morsitans corresponds roughly with the Atlantic/Indian Ocean watershed. Glossina morsitans morsitans is one of the major vectors of human African trypanosomiasis in eastern Africa.

Glossina morsitans
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