1. Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99163, USA
2. Paul G. Allen School for Global Animal Health, Washington State University, Pullman, WA 99163, USA
3. Institute of Biochemistry, ETH Zurich, 8093 Zurich, Switzerland
4. Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA
5. Department of Microbiology and Immunology, Loyola University Chicago Stritch School of Medicine, Maywood, IL 60153, USA