Roundworm Egg (image) University of Basel Share Print E-Mail Caption This image shows a roundworm egg (Ascaris sp.) with a typical undulating membrane. Credit University of Basel, IPAS Usage Restrictions None Share Print E-Mail 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.