Ancient Parasitic DNA (IMAGE) Cambridge University Press Caption The oldest parasite DNA ever recorded has been found in the ancient, desiccated faeces of a puma. Credit Ancient parasitic DNA reveals Toxascaris leonina presence in Final Pleistocene of South America. Romina S. Petrigh, Jorge G. Martínez, Mariana Mondini and Martín H. Fugassa. Parasitology. 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.