1. Key Laboratory of Livestock Infectious Diseases in Northeast China Ministry of Education Shenyang Agricultural University Shenyang P. R. China
2. Innovative Institute of ZoonosesInner Mongolia University for the Nationalities Tongliao P. R. China
3. School of Public Health Sun Yat‐sen University Guangzhou P. R. China
4. Brucellosis Department Heilongjiang Agricultural Reclamation General Hospital Harbin P. R. China