1. Department of Food Science, Louisiana State University Agricultural Center, Baton Rouge, Louisiana.
2. Department of Nutrition and Food Science, University of Maryland, College Park, Maryland.
3. Division of Microbiology, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, Maryland.
4. San Francisco District Laboratory, Office of Regulatory Affairs, U.S. Food and Drug Administration, Alameda, California.
5. Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, Maryland.