1. Biosciences
Research Laboratory, Agricultural Research Service, USDA, 1605 Albrecht
Boulevard, Fargo, North Dakota 58102, United States
2. Office
of Public Health Science, Food Safety and Inspection Service, USDA, 1400 Independence Avenue SW, Washington, DC 20250, United States
3. Office
of Public Health Science, Food Safety and Inspection Service, USDA, 2150 Centre Avenue, Building D, Suite 320, Fort Collins, Colorado 80526, United States
4. Department
of Veterinary Technology, North Dakota State University, Hultz Hall Rm 165, Fargo, North Dakota 58102, United States