1. State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
2. Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, Hubei, China
3. National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Obihiro Hokkaido, Japan