It's worth mentioning that disease vector
carried by the tsetse fly is the vector for African sleeping sickness
. The disease is caused by Trypanosoma rhodesiense
or T. gambiense
(no doubt named for the location on the continent
of their first discoveries), which acts parasitically in the blood of humans as well as other vertebrates. The disease most commonly caused in other animals is called nagana
It's also worth mentioning that the tsetse fly and the common housefly are in the same family.