Citrobacter rodentium (image) Brigham and Women's Hospital Caption Citrobacter rodentium bacterial cells (reddish-brown) reside alongside commensal flora (black rods) in the colon. Credit Image courtesy of Bry laboratory. Usage Restrictions Please only use with associated press release. 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.