West Nile virus (WNV) is a mosquito-borne disease that causes seasonal epidemics in the United States that peaks in the summer and continues into the fall. Its natural cycle is bird to mosquito to bird and mammal [13, 14]. From 1999 through 2001, the incidence of WNV in the United States was fairly stable. However, in 2002, WNV swept across the country. In 2001, there were 66 confirmed cases in 10 states in the United States, with a total of 10 fatalities [13]. In 2002, there were 4156 cases in 40 states, with 284 fatalities. The majority of cases occurred in the summer months, with a peak in August, when mosquitoes are most active