通讯作者:Xue, SY , Qingdao Shibei Municipal Ctr Dis Control & Preven, Qingdao, Peoples R China.; Baloch, Z , South China Agr Univ, Coll Vet Med, Guangzhou, Guangdong, Peoples R China.
通讯作者:Xue, SY , Qingdao Shibei Municipal Ctr Dis Control & Preven, Qingdao, Peoples R China.; Baloch, Z , South China Agr Univ, Coll Vet Med, Guangzhou, Guangdong, Peoples R China.