1. Department of Veterinary Pathobiology, Texas A&M University, 4467 TAMU, College Station, Texas 77843-4467, USA
2. Department of Veterinary Integrative Biosciences, Texas A&M University, 4458 TAMU, College Station, Texas 77843-4458, USA
3. Texas Department of State Health Services, PHR1, 6302 Iola Ave, Lubbock, Texas 79424, USA