1. Department of Large Animal Medicine and Surgery, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843, USA
2. Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843, USA
3. Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, USDA, Agricultural Research Service, Peoria, IL 61604-3999, USA