Trypanosomes in the Tsetse Fly (IMAGE) University of Würzburg Caption This is a 3-D model of the proventriculus, a special organ of the tsetse fly: The distribution of the trypanosomes based on the fluorescent cell nuclei is shown in yellow. Credit (Picture: Chair of Zoology I / <i>eLife</i>) 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.