Nadell viral resistance (IMAGE) Dartmouth College Caption Unprotected E. coli (yellow) are killed by predatory bacteria (blue) as others are safely surround by dense colonies of V. cholerae (red). Credit Benjamin Wucher Usage Restrictions N/A 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.