1. Department of Pathology, Microbiology, and Immunology, University of California–Davis, Davis, CA, USA
2. California Animal Health and Food Safety Laboratory, San Bernardino Branch, University of California–Davis, Davis, CA, USA
3. National Institute for Agrarian and Veterinary Research (INIAV), Oeiras, Portugal and Faculty of Veterinary Medicine, Lusofona University, Lisboa, Portugal
4. Comparative Pathology Laboratory, University of California–Davis, Davis, CA, USA