From the Bacterial Special Pathogens Branch (J.E.G., W.A.B., J. Petras, M.G.E., L.L., D.D.B., C.A.G., Z.P.W., M.E.N., A.R.H.), the Poxvirus and Rabies Branch (A.K.), and the Infectious Diseases Pathology Branch (J.M.R., S.R.Z.), Division of High-Consequence Pathogens and Pathology, the Epidemic Intelligence Service (A.K., J. Petras, J. Gettings, M.F., W.W.W., E.B.), and the Prevention and Response Branch, Division of Healthcare Quality Promotion (W.W.W., E.B.), Centers for Disease Control and Prevention, the Georgia Department of Public Health (J. Gettings, S.B., J. Pavlick, J. Gabel, C.D.), and the Department of Pathology and Laboratory Medicine, Emory University School of Medicine (R.G.), Atlanta, Public Health District 1-1, Georgia Department of Public Health, Rome (M.H.), and Dekalb County Medical Examiner's Office, Decatur (R.G., C.L.) - all in Georgia; the Minnesota Department of Health, St. Paul (M.B., M.F., R.L.); the Kansas Department of Health and Environment, Topeka (A.Z., C.R., F.S.A.); Public Health Regions 2 and 3, Texas Department of State Health Services, Arlington (H.H., S.S.), and the Texas Department of State Health Services, Austin (B.J.O.); and Menzies School of Health Research, Charles Darwin University and Royal Darwin Hospital, Darwin, NT (B.J.C., J.R.W.), and the Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC (J.R.W.) - both in Australia.