<i>E. coli</i> Bacteria (IMAGE) Indiana University Caption E. coli bacteria was used to study the sequences in DNA where the risk for mutation is significantly elevated. Credit National Institute of Allergy and Infectious Diseases Usage Restrictions Credit NIAID 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.