infections
African Sleeping Sickness
Transmission
 are usually transmitted to people when an infected tsetse fly bites them and injects the protozoa into the skin. The protozoa move to the Overview of the Lymphatic System and bloodstream, where they multiply. They then travel to organs and tissues throughout the body and eventually reach the brain. The infection is spread when a fly bites an infected person or animal, then bites another person. An infected mother can transmit the protozoa to her baby during pregnancy or delivery. Rarely, people are infected through blood transfusions. Theoretically, the infection could be transmitted through an organ transplant from an infected donor. 