CWD Research (IMAGE) University of Wyoming Caption David Edmunds, recent University of Wyoming Ph.D. graduate, performs a tonsil biopsy on a white-tailed deer to test for chronic wasting disease. He and other UW researchers have documented the first conclusive evidence that CWD found at high prevalence leads directly to population declines in free-ranging deer populations. Credit Todd Cornish 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.