Nagana is one of the most serious diseases of domestic animals in Central and Southern Africa.
"Insects and Diseases" by Rennie W. Doane
The nagana, or tsetse-fly disease of cattle is the most virulent disease of domestic animals in certain parts of Africa.
"Handbook of Medical Entomology" by William Albert Riley
Nagana is the name of the disease caused by the tsetse-fly bite.
"Seven Legs Across the Seas" by Samuel Murray