/West Nile Virus

West Nile Virus

West Nile virus is a potentially serious illness that is most often spread through the bite of an infected mosquito. Mosquitoes become infected when they feed on infected birds. Infected mosquitoes can then spread the virus to humans and other animals. West Nile virus has been detected in all lower 48 states (but not in Hawaii or Alaska) and outbreaks of disease have been occurring in the United States every summer since 1999.

The first human cases of West Nile virus in Clark County, along with the first positive mosquitoes, were reported in 2004. The health district conducts surveillance of mosquito populations to monitor the level of virus throughout the valley. Every year since then (except 2010), the virus has been found in both humans and mosquitoes. West Nile virus is now endemic in Clark County, which means we expect to see the virus every year during the mosquito season, which occurs April through November.

The most effective way to avoid West Nile virus disease is to prevent mosquito bites. You can play an important role in monitoring West Nile virus by reporting stagnant water, green swimming pools or other potential mosquito breeding sources to your local code enforcement agency. Visit the Mosquito Surveillance for more information on reporting mosquito activity to the health district. For additional information on West Nile virus visit the Frequently Asked Questions page or the Nevada Department of Agriculture’s website.

West Nile Virus – Public Health Updates & News Releases

108, 2019

West Nile virus an ongoing risk in Southern Nevada

The Southern Nevada Health District reports three more Clark County residents have neuroinvasive illness caused by the West Nile virus. All three individuals are male, and over the age of 50. These new cases bring the year’s total to 11. Nine of the 11 cases reported to the Health District had the neuroinvasive form of the illness.

608, 2019

Public Health Update – Health District reports 12th Case of West Nile Virus

LAS VEGAS – The Southern Nevada Health District is reporting Clark County’s 12th case of West Nile virus. The individual is a male over the age of 50 with the neuroinvasive form of the illness. Ten of the 12 cases reported to the Health District have had the more serious, neuroinvasive form of the illness.

708, 2019

Public Health Update – Health District reports 13th, 14th, and 15th Cases of West Nile Virus

The Southern Nevada Health District is reporting three additional cases of West Nile virus, bring the year’s total to 15. One individual is a female under the age of 50 with the non-neuroinvasive form of the illness. The other two individuals are both male, under the age of 50, with the non-neuroinvasive form of the illness. Of the 15 reported cases, 10 had the more serious, neuroinvasive form of the illness.

808, 2019

Public Health Update – Health District reports 16th Case of West Nile Virus

LAS VEGAS – The Southern Nevada Health District is reporting an additional case of West Nile virus, bring the year’s total to 16. The individual is a male over the age of 50 with the neuroinvasive form of the illness. Of the 16 reported cases, 11 have had the more serious, neuroinvasive form of the illness.

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Contact Information

Phone:
(702) 759-1633

Updated on: August 22, 2019

2019-08-22T13:50:59+00:00