Affiliation: | (1) US Department of Agriculture, Animal and Plant Health Inspection Service, Science and Technology, National Veterinary Services Laboratories, 50010 Ames, IA, USA;(2) US Department of Agriculture, Agriculture Research Service, Northern Regional Research Center, 61604 Peoria, IL, USA;(3) College of Veterinary Medicine, Veterinary Diagnostic Laboratory, Iowa State University, 50010 Ames, IA, USA |