Microscope Picture (IMAGE) Penn State Caption A dragonfly gut cut open along length-wise, revealing a heavy infection of gregarine parasites, shown by Penn State researchers to cause metabolic disorders in its host. Credit None 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.