1. Southeast Poultry Research Laboratory, USDA-ARS , 934 College Station Road, Athens, GA, 30605, USA
2. National Veterinary Services Laboratories, USDA-APHIS , P.O. Box 844, Ames, IA, 50010, USA
3. Texas Veterinary Medical Diagnostic Laboratory , 1812 Water Street, Box 84, Gonzales, TX, 78629, USA
4. California Animal Health and Food Safety Laboratory System — Fresno Branch, University of California, Davis , 2789 South Orange Ave, Fresno, CA, 93725, USA
5. Department of Medical Microbiology, University of Georgia , Athens, GA, 30605, USA