Trypanosome is a single-celled parasite that takes an extensive human and economic toll due to its involvement in causing sleeping sickness in humans and a similar disease in cattle. The parasite, found mainly in rural areas of Africa, is transmitted to humans or cattle by the tsetse fly. There is no vaccine for the disease, and current treatments are difficult and ineffective due to the resistance of the parasites to existing drugs.
Source:
phys.org