Fungi and Crohn's (IMAGE) Cell Press Caption This visual abstract depicts the findings of Limon et al., who surveyed intestinal wall associated fungi in patients with Crohn's disease (CD) and healthy controls and found a common commensal skin yeast called Malassezia, preferentially in CD patients. Malassezia exacerbates colitis in mouse models through mechanisms requiring CARD9, a signaling protein involved in anti-fungal immunity. Credit Limon <em>et al.</em> Usage Restrictions Credit Required. 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.