A Tsetse Fly (image) Entomological Society of America Share Print E-Mail Caption This is a tsetse fly, the vector of trypanosomiasis (sleeping sickness). Credit International Atomic Energy Agency, CC BY-SA 4.0. Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.