1. 1. Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, 2407 River Drive, Knoxville, TN 37996, USA
2. 2. Department of Comparative Medicine, College of Veterinary Medicine, University of Tennessee, 2407 River Drive, Knoxville, TN 37996, USA
3. 3. Virology Department, College of Veterinary Medicine, Suez Canal University Faculty of Veterinary Medicine, Ismailia, Egypt
4. 4. Institute of Natural Resource Sustainability at the University of Illinois at Urbana-Champaign, Illinois Natural History Survey, 1816 South Oak Street, Champaign, IL 61820, USA