1. Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine
2. D. B. Warnell School of Forest Resources, The University of Georgia, Athens, Georgia 30602, USA
3. Johne's Testing Center, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin 53706, USA
4. Current address: Wildlife Health Associates Inc., PO Box 109, Dillon, Montana 59725, USA