Engineering the bacteria-immune interface (IMAGE) Columbia University Irving Medical Center Caption Engineered bacterial cells (purple) activate several parts of the immune system to attack tumor cells (gray). Credit Columbia University Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.