Terry Spraker

Professor Microbiology, Immunology, and Pathology

319 Diagnostic Medicine Center

(970) 297-4155

About Terry

Dr. Spraker is Professor of Pathology. His research focuses on naturally occurring diseases in wild mammals and birds. Current projects include surveillance of chronic wasting disease of deer and elk, diseases of marine mammals and sea turtles. Dr. Spraker has conducted long-standing field studies evaluating population declines in artic fur seals and understanding the anthropogenic influences and disease processes impacting these marine mammals.


PhD, Colorado State University, 1979DVM, Colorado State University, 1972BS, Colorado State University, 1970


Diplomate, Anatomic Pathology
American College of Veterinary Pathologists


K. A. Fox, S. K. Wootton, S. L. Quackenbush, L. L. Wolfe, I. K. LeVan, Mi. W. Miller, and T. R. Spraker. Paranasal Sinus Masses of Rocky Mountain Bighorn Sheep (Ovis canadensis canadensis). Vet Path. In Press Root JJ, Bentler KT, Nemeth NM, Gidlewski T, Spraker TR, Franklin AB: 2010. Experimental infection of raccoons (Procyon lotor) with West Nile virus.Am.J.Trop.Med Hyg. 83:803-807.Spraker Terry R and Michelle Landers. 2010. Causes of mortality in Northern Fur Seals, St. Paul Island, Alaska. Journal of Wildlife Diseases. Journal of Wildlife Diseases.43:450-473.Rhyan JC and Spraker TR: 2010 Emergence of Diseases from Wildlife Reserviors. Veterinary Pathology.47:34-40.Aru Balachandran, Noel P. Harrington, James Algire, Andrei Soutyrine, Terry R. Spraker, Martin Jeffrey, Lorenzo Gonzalez, Katherine I. O’Rourke. 2010. Experimental oral transmission of chronic wasting disease to red deer (Cervus elaphus elaphus): early detection and late stage distribution of protease-resistant prion protein. Canadian Journal of Research. 51:169-178.Wolfe LL, Diamond B, Spraker TR, Sirochman MA, Walsh DP,Machin CM, Bade DJ, Miller MW: 2010. A Bighorn Sheep Die-off in Southern Colorado Involving a Pasteurell ceae Strain that May Have Originated from Syntopic Cattle. Journal of Wildlife Diseases. 46:1262-1268. Spraker TR, T Gidlewski, JG Powers, MA Wild, JJ Greenlee, AN Hamir, KI O’Rourke: 2010. Detection of PrP CWD in the optic pathways of the brain and retina of Rocky Mountain elk (Cervus elaphus nelsoni) with chronic wasting disease. Veterinary Pathology. 47:536-546. N. M. Nemeth, B. V. Thomsen, T. R. Spraker, J. M. Benson, A. M. Bosco-Lauth, P. T. Oesterle, J. M. Bright, J. P. Muth, T. W. Campbell, T. L. Gidlewski, and R. A. Bowen. Clinical and Pathologic Responses of American Crows (Corvus brachyrhynchos) and Fish Crows (C. ossifragus) to Experimental West Nile Virus Infection. Vet Path. In press Aru Balachandran, B. Thomsen, T Gidlewski, T. Spraker, G Mitchell, A. Soutyrine, N. Harrington, R. Munger, J. McLane, R. Allen, D.A. Schneider and K.I. O’Rourke. 2010. Diagnosis of preclinical CWD in Farmed white-tailed deer in Canada by the immunohistochemical examination of rectal biopsies. Canadian Journal of Research. In Press White Stephen N, O’Rourke Katherine I, Gidlewski Thomas L, VerCauteren Kurt C, Mousel Michelle R and Spraker Terry R. 2010. Increased risk of chronic wasting disease in Rocky Mountain elk associated with decreased magnesium and increased manganese in brain tissues. Canadian Journal of Veterinary Research. 74:50-53.