West Nile Virus, a mosquito-borne disease, was first identified in mosquito and human populations of Clark County in 2004. In response to this public health threat, the Southern Nevada Health District (SNHD) developed a Mosquito Disease Surveillance Program to survey mosquito populations for arboviral diseases including West Nile Virus (WNV), Western Equine Encephalitis (WEE) and Saint Louis Encephalitis Virus (SLEV). Annual trends of human WNV and SLEV cases are found in Figure 1. SNHD is the only entity in Clark County capable of monitoring mosquito populations across the six distinct jurisdictions within the county, including City of Las Vegas, unincorporated Clark County, City of Henderson, City of North Las Vegas, City of Mesquite and the City of Boulder City.