A Worm-Like Pathogen (IMAGE) University of Würzburg Caption Trypanosomes are worm-like parasites which cause sleeping sickness. Credit (Picture: Tim Krüger und Markus Engstler) Usage Restrictions None License Licensed content 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.