First West Nile Virus Death Reported in LA County Plus Information and Resources

The Los Angeles County Department of Public Health or Public Health has confirmed the first death due to West Nile virus or WNV for the 2021 season in Los Angeles County. The patient, a resident of the eastern region of Los Angeles County, was hospitalized and died from WNV-associated neuro-invasive disease. 

Humans get WNV through the bite of an infected mosquito. Most mosquitoes do not carry the virus; therefore, most people bitten by a mosquito are not exposed to WNV. Those who do get WNV may experience mild symptoms including fever, muscle aches, and tiredness. In some cases, especially in persons over 50 years of age and those with chronic medical conditions such as cancer and diabetes, severe WNV infection can occur and affect the brain and spinal cord causing meningitis, encephalitis, and paralysis. There is no specific treatment for WNV disease and no vaccine to prevent infection.

A total of 10 cases have been documented in Los Angeles County this year. WNV-infected mosquitoes, dead birds, and sentinel chickens have been identified across Los Angeles County. Public Health monitors cases of WNV infection and collaborates with local vector control agencies to reduce the risk of WNV to humans by promoting prevention and mosquito reduction.

Decrease your risk of exposure:

1. Protect yourself: Mosquito repellents can keep mosquitoes from biting you. EPA-registered repellents containing DEET, picaridin, IR3535, 2-undecanone, and oil of lemon eucalyptus are the longest lasting and most effective. They are available as sprays, wipes, and lotions. Find the repellent that’s right for you here. Consider wearing long-sleeved clothes and pants when outside.
2. Mosquito proof your home: Make sure that your doors and windows have tight-fitting screens to keep out mosquitoes. Repair or replace screens with tears or holes.
3. Reduce mosquitoes: Mosquitoes lay their eggs on standing water.

• Check for items that hold water inside and outside your home once a week
• Cover water storage containers such as buckets and rain barrels. If there’s no lid, use wire mesh with holes smaller than an adult mosquito
• Clear standing water in flower pots, saucers, birdbaths and other containers
• Clean and maintain swimming pools, spas and drain water from pool covers
• Throw away old items in your patio or yard that can hold water, e.g., old car tires and children’s toys
• Call 2-1-1 or visit www.socalmosquito.org to report persistent problems to your mosquito control district.

More information and resources:

• West Nile virus in LA County: http://publichealth.lacounty.gov/acd/VectorWestNile.htm
• West Nile virus information by phone: (800) 232-4636
• West Nile virus in California: http://westnile.ca.gov
• Health education materials on mosquito control and preventing West Nile virus infections: http://www.socalmosquito.org
• It’s Not Just A Bite, a mosquito-borne disease public health campaign http://bit.ly/NotJustABite

Where to call with questions about mosquitoes:

• Greater Los Angeles County Vector Control District: 562-944-9656
• Los Angeles County West Vector Control District: 310-915-7370
• City of Long Beach Vector Control Program: 562-570- 4132

Stagnant swimming pools or “green pools” should be reported to the Public Health Environmental Health Bureau at 626-430-5200, or to a local vector control agency. Dead birds may be reported by calling 877-968-2473 or online: https://westnile.ca.gov/report.php