[1] Nanjing Agr Univ, Inst Immunol, Jiangsu Engn Lab Anim Immunol, Nanjing, Jiangsu, Peoples R China
[2] Nanjing Agr Univ, Coll Vet Med, Nanjing, Jiangsu, Peoples R China
[3] South China Agr Univ, Key Lab Zoonosis Prevent & Control Guangdong Pro, Guangzhou, Guangdong, Peoples R China
[4] South China Agr Univ, Coll Vet Med, Guangzhou, Guangdong, Peoples R China
[5] Free Univ Berlin, Vet Fac, Ctr Infect Med, Inst Virol, Berlin, Germany