Adult schistosome parasites (IMAGE) Texas Biomedical Research Institute Caption Scanning electron microscopy (SEM) image of adult schistosome parasites. The skinnier female resides within the larger split body of the male worm. Credit James J Collins and Ana Vieira/UT Southwestern Usage Restrictions Free to use with credit. 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.