TOOLS: West Nile Watch

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Science  17 Jun 2005:
Vol. 308, Issue 5729, pp. 1721
DOI: 10.1126/science.308.5729.1721b

Because of wet weather this year, some western states are expecting a surge in infections from the West Nile virus. The mosquito-borne disease, which first struck the United States in 1999, sickened more than 2400 people across the nation last year, killing 88. You can track this year's outbreak using a mapper from the U.S. Geological Survey. Updated twice weekly during prime mosquito months, the site charts human cases, along with reports of infected birds, horses, and sentinels—chickens or other animals that scientists test regularly to reveal the disease's presence. You can also chart where mosquitoes carrying the virus have turned up. An archive lets you compare this season's results to those from past years.

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