Surveillance for Human West Nile Virus Disease — United States, 1999–2008

MMWR Surveillance Summaries April 2, 2010  V.59  N.SS-2 p.1-17

Nicole P. Lindsey, MS, J. Erin Staples, MD, PhD, Jennifer A. Lehman, Marc Fischer, MD

Division of Vector-Borne Infectious Diseases, National Center for Emerging and Zoonotic Infectious Diseases

During 1999–2008, a total of 28,961 confirmed and probable cases of West Nile virus (WNV) disease, including 11,822 (41%) WNV neuroinvasive disease cases, were reported to CDC from 47 states and

the District of Columbia. The national incidence of WNV neuroinvasive disease peaked in 2002 and was stable during 2004–2007, which might represent an endemic level of WNV transmission. In 2008, the incidence was 0.23 per 100,000 population, compared with 0.41 in 2007 and 0.50 in 2006 …

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