1. U.S. Geological Survey; Western Ecological Research Center; 21803 Cactus Avenue; Suite F, Riverside; CA 92518 USA
2. U.S. Geological Survey; Western Ecological Research Center; 800 Business Park Drive; Suite D, Dixon; CA 95620 USA
3. Seal Beach; CA 90740 USA
4. Department of Infectious Diseases and Pathology; College of Veterinary Medicine; University of Florida; Gainesville FL 32611-0880 USA