Shigella Bacteria (IMAGE) University of Cologne Caption Shigella bacteria can override programmed cell death, thereby establishing a niche to spread. Credit Hamid Kashkar, University of Cologne 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.