1. Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado 80523, USA
2. Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado 80523, USA
3. Present address: USDA-APHIS-Wildlife Services’ National Wildlife Disease Program, Fort Collins, Colorado 80521, USA
4. Rancher’s Supply, Inc., 26690 Pine Oak Road Ochopee, Florida 34141, USA