1. Department of Integrative Biology, Oklahoma State University, Stillwater, Oklahoma, USA.
2. Center for the Ecology of Infectious Diseases, University of Georgia, Athens, Georgia, USA.
3. Department of Agricultural and Applied Economics, University of Georgia, Athens, Georgia, USA.
4. Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA.
5. Odum School of Ecology, University of Georgia, Athens, Georgia, USA.