国家自然科学基金项目31260606;家畜疫病病原生物学国家重点实验室开放基金课题项目SKLVEB2011KFKT007;石河子大学高层次人才科研启动项目No.RCZX201104联合资助 Supported by the Program of the National Natural Science Foundation of China31260606;the Open Fund Project of State Key Laboratory of Veterinary Etiological BiologySKLVEB2011KFKT007;the High Level Talents Scientific Research Project of Shihezi UniversityRCZX201104