1. Institute of Animal Sciences Chinese Academy of Agricultural Sciences Beijing China
2. Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Technology of Beijing Ministry of Agriculture Beijing China
3. Institute of Veterinary Medicine Jiangsu Academy of Agricultural Sciences Key Laboratory of Veterinary Biological Engineering and Technology Ministry of Agriculture Nanjing China
4. Department of Pathobiology College of Veterinary Medicine University of Illinois at Urbana‐Champaign Urbana IL USA
5. Key Laboratory of Zoonosis Research Ministry of Education Institute of Zoonosis and Department of Public Health Jilin University Changchun China