1. Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang 473061, China
2. College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
3. College of Veterinary Medicine and Engineering, Nanyang Vocational College of Agriculture, Nanyang 473061, China