Emerging Infectious Disease ISSN: 1080-6059

Enhancing West Nile Virus Surveillance, United States

John S. Brownstein*, Theodore R. Holford*, and Durland Fish*

Author affiliations: *Yale School of Medicine, New Haven, Connecticut, USA

Figure 2

Plots of West Nile virus (WNV) incidence by collections of virus-positive dead birds and virus-positive mosquito pools. Log linear models fit to both surveillance systems considered alone are displayed. WNV-infected dead birds explain 2.5% of the variation in human incidence, whereas WNV-infected mosquito pools explain 38%.

Figure 2. Plots of West Nile virus (WNV) incidence by collections of virus-positive dead birds and virus-positive mosquito pools. Log linear models fit to both surveillance systems considered alone are displayed. WNV-infected dead birds explain 2.5% of the variation in human incidence, whereas WNV-infected mosquito pools explain 38%.

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