From the *Centers for Disease Control and Prevention, Atlanta, GA; †Atlanta Research and Education Foundation, US Department of Veterans Affairs, Atlanta, GA; ‡California Department of Public Health, Gardena, CA; §Massachusetts Department of Health, Jamaica Plain, MA; ¶Minnesota Department of Health, St. Paul, MN; ∥Wisconsin Department of Health and Family Services, Madison, WI; **Vermont Department of Health, Burlington, VT; and ††New Hampshire Department of Health and Human Services, Concord, NH.
Accepted for publication May 21, 2009.
No external sources of financial support were received for the work presented in this manuscript and none of the authors have potential conflicts of interest with regard to this manuscript.
Presented at the Infectious Diseases Society of America Annual Meeting in San Diego, California in October 2007.
Address for correspondence Mark Sotir, PhD, MPH, Enteric Diseases Epidemiology Branch, Division of Foodborne, Bacterial, and Mycotic Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd NE, MS A-38, Atlanta, GA 30306. E-mail: [email protected].
Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Web site (www.pidj.com).