Worm Model (VIDEO) University of Kansas This video is under embargo. Please login to access this video. Caption Under normal conditions while feeding on healthy bacteria, C. elegans digestive tracts are moderately acidic compared to human stomachs. Harmful bacteria prompted a less acidic digestive tract in C. elegans -- a result that runs counter to what one might expect if the acidic environment was generated to kill bacteria. Credit University of Kansas 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.