1. College of Plant SciencesJilin UniversityChangchun 130062 China
2. Key Laboratory of Zoonosis Research, Ministry of EducationJilin UniversityChangchun 130062 China
3. College of Natural SciencesThe University of Texas at AustinAustin TX 78712 USA
4. Department of Microbial Pathogenesis and ImmunologyTexas A&M Health Science CenterCollege Station TX 77843 USA
5. Norman Borlaug Center, Texas A&M UniversityCollege Station TX 77843 USA
6. Department of Veterinary PathobiologyCollege of Veterinary Medicine, Texas A&M UniversityCollege Station TX 77843 USA