Human sleeping sickness is a zoonotic disease which is transmitted by a tsetse fly vector known as Glossina species. Basically, two types of sleeping sickness affecting human are known namely Trypanosoma brucei gambiense and Trypanosoma brucei rhodensiense. According to WHO, the disease occurs in 36 sub Saharan countries within the distribution of the tsetse fly belt. Human sleeping sickness may not be a known world-wide killer disease such as malaria and AIDS; however, it is an important disease in sub-Saharan Africa and is responsible for a considerable degree of suffering and mortality in...