1. College of Animal Science and Technology, Inner Mongolia University for Nationalities, Inner Mongolia Tongliao 028042, China.
2. Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis/College of Veterinary Medicine, Jilin University, Changchun 130000, China.
3. Key Laboratory of Veterinary Parasitology of Gansu Province, State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, China. Chinese Academy of Sciences, Lanzhou 730000, China.