1. Center for Wildlife Health, Department of Forestry, Wildlife, and Fisheries, The University of Tennessee, Knoxville, Tennessee.
2. Bacterial Diseases of Livestock Research Unit, National Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Ames, Iowa.
3. Departments of Biostatistics, Statistics, and Epidemiology, University of Kentucky, Lexington, Kentucky.
4. School of Veterinary Medicine, New Bolton Center, University of Pennsylvania, Kennett Square, Pennsylvania.
5. Research Team for Paratuberculosis, National Institute of Animal Health, Tsukuba, Japan.