[1] CDC, Epidem Intelligence Serv, Atlanta, GA 30333 USA
[2] Arkansas Dept Hlth, Little Rock, AR 72205 USA
[3] Univ Arkansas Med Sci, Little Rock, AR 72205 USA
[4] CDC, Mycot Dis Branch, Div Foodborne Waterborne & Environm Dis, Natl Ctr Emerging & Zoonot Infect Dis, Atlanta, GA 30333 USA