R Gage, MSPH, A Crielly, MS, M Baysinger, E Chernak, MD, G Herbert, A Johnson-Entsuah, MPH, Montgomery County Health Dept, Norristown; G Fraser, C Rinehardt, M Solomon, G Withers, MS, R Berman, MS, Bur of Laboratories, Lionville; M Moll, MD, J Rankin, DVM, Pennsylvania Dept of Health. J Carroll, M Ettinger, MS, S Henderson, M Mismas, D Patel, T Reed, E Smith, J Wozniak, MS, D Toney, PhD, J Pearson, DrPH, Virginia Div of Consolidated Laboratory Svcs, Richmond. J Hofmann, MD, Snohomish Health District, Everett; J Grendon, DVM, J Kobayashi, MD, Washington Dept of Health. Animal and Plant Health Inspection Svc, US Dept of Agriculture. Foodborne and Diarrheal Diseases Br, Div of Bacterial and Mycotic Diseases, National Center for Infectious Diseases; and an EIS Officer, CDC.