Mouse Small Intestine (IMAGE) University of Chicago Medical Center Caption Commensal bacteria (red) reside amongst the mucus (green) and epithelial cells (blue) of a mouse small intestine. Credit University of Chicago Usage Restrictions None 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.