Suckling Piglets (image) University of Veterinary Medicine -- Vienna Share Print E-Mail Caption Scientists of Vetmeduni Vienna confirmed a resistance against Toltrazuril of the parasite Cystoisospora suis for the first time. This parasite causes diarrhea predominantly in suckling piglets. Credit Michael Bernkopf/Vetmeduni Vienna 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.