1. Institute of Bioinformatics, University of Georgia , Athens, Georgia, USA
2. Center for the Ecology of Infectious Diseases, University of Georgia , Athens, Georgia, USA
3. Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, University of Tennessee , Knoxville, Tennessee, USA
4. Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia , Athens, Georgia, USA