1. Department of Microbiology and Immunology
2. Fort Dodge Animal Health, Fort Dodge, Iowa
3. Department of Veterinary Science, University of Nebraska-Lincoln, Lincoln, Nebraska
4. Department of Pathology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
5. Department of Biomedical Sciences and Pathobiology, Center for Molecular Medicine and Infectious Diseases, College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia