1. Department of Entomology, Virginia Polytechnic Institute and State University, College of Agriculture and Life Sciences , Blacksburg, VA 24061 , USA
2. Department of Statistics, Virginia Polytechnic Institute and State University, College of Science , Blacksburg, VA 24601 , USA
3. Virginia Tech Center for Emerging, Zoonotic, and Arthropod-Borne Pathogens (CEZAP) and the VT Global Change Center , Blacksburg, VA 24061 , USA