The Southern Nevada Health District has reported the first mosquitoes of the year testing positive for West Nile virus in the 89123 ZIP code. As part of its “Fight the Bite” campaign, officials are urging residents to take precautions, advising people to “Eliminate standing water around their homes, Use an FDA-registered insect repellent and wear protective clothes.” Residents are also encouraged to report mosquito activity and green pools to local code enforcement agencies, according to 8NewsNow.
The Southern Nevada Health District has been setting mosquito traps across Clark County since April, with more than 1,670 placed so far. Collected mosquitoes are sorted, cataloged, and tested for viruses at the Southern Nevada Public Health Laboratory. More than 1,800 mosquito pools have been tested in 2025
Las Vegas health officials are monitoring both West Nile virus and Aedes aegypti mosquitoes, which can spread Zika, dengue, and chikungunya. Aedes aegypti mosquitoes bite during the day, prefer human blood, and can breed in very small amounts of water, such as a bottle cap. The Southern Nevada Health District advises using repellents, removing standing water, and staying alert. The region reported 43 human cases of West Nile virus in 2019 and 26 cases in 2024, following lower numbers in 2021 through 2023. More information is available on the Health District’s mosquito surveillance website.
