This disease is well documented in mummies from Pharonic Egypt more than 3,000 years ago. The disease is very difficult to cure. See the diagram on page 341. This section concludes the reading. Along the way, this 'dynamic duo' have determined what land is colonized and in many cases-protected land from ecological disaster.
Tsetse flies inhabit Africa only south of the Sahara.
It has made livestock production impossible on more than six million square miles of land. The flies are the vector for the infectious agent, the trypanosome. In the tsetse fly, the trypanosome makes its way from the gut to the salivary glands, ready to infect a new host. Immune systems don't have a chance. Humans are the accidental host for this organism.