West Nile Virus, Texas, USA, 2012

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West Nile Virus, Texas, USA, 2012

Abstract and Introduction


During the 2012 West Nile virus outbreak in Texas, USA, 1,868 cases were reported. Male patients, persons >65 years of age, and minorities were at highest risk for neuroinvasive disease. Fifty-three percent of counties reported a case; 48% of case-patients resided in 4 counties around Dallas/Fort Worth. The economic cost was >$47.6 million.


West Nile virus (WNV) first emerged in Texas, USA, in 2002. Since then, the virus has become endemic, with ≈2,200 human cases reported in the state during 2002–2011. In 2012, an unprecedented outbreak of WNV occurred in Texas; ≈1,900 cases were reported. The objective of this study was to understand the epidemiology of the 2012 WNV outbreak in Texas.

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