Electron micrograph of Escherichia coli (IMAGE) Helmholtz Centre for Infection Research Caption Electron micrograph of Escherichia coli Credit Helmholtz Centre for Infection Research/Manfred Rohde Usage Restrictions The image may be used free of charge for non-commercial purposes with reference to the copyright. License Original 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.