Fungi in the intestinal mucosa (IMAGE) Weill Cornell Medicine Caption Fungi in the intestinal mucosa induce immune signals ( IL-17 cytokines) that impact the nervous system and animal behavior. Credit Artist credit: Katarina Liberatore. Usage Restrictions None. 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.