1. Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, The University of Georgia, Athens, Georgia 30602, USA
2. Warnell School of Forest Resources, The University of Georgia, Athens, Georgia 30602, USA
3. Current Address: Department of Biology, 1500 North Patterson Street, Valdosta State University, Valdosta, Georgia 31698, USA
4. Department of Pathology, College of Veterinary Medicine, The University of Georgia, Athens, Georgia 30602, USA
5. Infectious Diseases Pathology Activity, Division of Viral and Rickettsial Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA
6. Division of Viral and Rickettsial Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA