Jose A. Ramos-Vara3Indiana Animal Disease Diagnostic Laboratory, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47907. 1Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47907. 2Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47907. 3Indiana Animal Disease Diagnostic Laboratory, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47907.