Lena König, University of Vienna (IMAGE) University of Vienna Caption Lena König, the study's first author and doctoral student at the Centre for Microbiology and Environmental Systems Science, investigates the interaction between bacterial endosymbionts and the pathogen Legionella pneumophila. Credit Lena König Usage Restrictions The image may only be used with appropriate caption or 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.