1. Bioproducts Research Unit, Western Regional Research Center, USDA-ARS, 800 Buchanan St., Albany, California 94710, United States
2. Department of Civil Engineering, The University of British Columbia, 2002-6250 Applied Science Lane, Vancouver, British Columbia V6T 1Z4, Canada
3. Foodborne Toxin Detection and Prevention Research Unit, Western Regional Research Center, Agricultural Research Service, United States Department of Agriculture, 800 Buchanan St., Albany, California 94710, United States
4. Infectious Bacterial Diseases of Livestock Research Unit, National Animal Disease Center, USDA-ARS, 1920 Dayton Ave, Ames, Iowa 50010, United States