Bacterial Symbionts (IMAGE) Johannes Gutenberg Universitaet Mainz Caption Bacterial symbionts (Burkholderia gladioli) inhabit glands in the reproductive system of Lagria villosa beetles. The fluorescently labeled bacteria are shown in yellow, insect host cell nuclei in blue. The bacteria produce antibiotics that protect beetle eggs from mold fungi. Credit photo/©: Paul Gaube and Laura V. Flórez, JGU Usage Restrictions This image may only be used in connection with the press release "Symbiotic bacteria: from hitchhiker to beetle bodyguard," issued by Johannes Gutenberg University Mainz on April 28, 2017. 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.