Excrement Infested with Roundworm (image) University of Basel Share Print E-Mail Caption This is excrement of human or swine infested with roundworm (Ascaris sp.) and whipworm (Trichuris sp.). 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.