1. Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, Georgia 30602, USA
2. Arkansas Game and Fish Commission, PO Box 720, Highway 56 East, Calico Rock, Arkansas 72519, USA
3. Kentucky Department of Fish and Wildlife Resources, 1 Sportsman's Lane, Frankfort, Kentucky 40601, USA
4. Current address: Department of Veterinary Sciences, University of Wyoming: Laramie, Wyoming 82070, USA
5. Johne's Information Center, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin 53706, USA