Backswimmer (IMAGE) KU Leuven Caption The predator cues emitted by the backswimmer trigger a stress response in the mosquitoes, which impairs their immune system. Credit © E. van Herk Usage Restrictions Please use appropriate credit 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.