1. Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, PO Box 712, Buhl, ID 83316
2. University of California, Davis, CA 95616, and Clear Springs Foods, PO Box 712, Buhl, ID 83316
3. Department of Pathology, School of Medicine, and Clear Springs Foods, PO Box 712, Buhl, ID 83316