Division of Livestock Infectious Diseases/State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, P.R.China;
Division of Livestock Infectious Diseases/State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, P.R.China;
College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University (Daqing High-tech Industrial Development Zone), Daqing 163319, P.R.China;
College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University (Daqing High-tech Industrial Development Zone), Daqing 163319, P.R.China;
College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University (Daqing High-tech Industrial Development Zone), Daqing 163319, P.R.China;
College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University (Daqing High-tech Industrial Development Zone), Daqing 163319, P.R.China;
Division of Livestock Infectious Diseases/State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, P.R.China;
Division of Livestock Infectious Diseases/State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, P.R.China;
Pathology Laboratory/State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, P.R.China;
College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University (Daqing High-tech Industrial Development Zone), Daqing 163319, P.R.China;