West Nile Virus Activity 2024

West Nile Virus in Los Angeles County

West Nile virus is the most common mosquito-borne disease that affects residents in Los Angeles County. Public health agencies detect West Nile virus every year in L.A. County which means it's endemic and found naturally in our city environments.

Our agency reports data related to mosquitoes. Human cases are reported by the L.A. County Department of Public Health.

The disease surveillance program serves as an early warning system in the detection of mosquito-borne viruses that can infect people and animals.

The District uses the following factors to assess health risk in your community:

Higher-than-average daily temperatures
Mosquito Population Monitoring – Using traps set up in every community
Mosquito Testing for Diseases
Dead Birds – A CA state program: Dead birds help determine spread of West Nile virus
Sentinel Chickens – Chickens develop antibodies to West Nile virus, which can be detected by testing.

Using these measurements, the District is able to protect your health by responding appropriately to mosquito-borne disease threats.

Year-to-Date Statistics for 2024

2024 WNV+ Mosquito Samples

City/Community	Date of First Detection	Positives
Winnetka	5/2/2024	1
	Total # of Positive Mosquito Samples This Year	1

2024 WNV+ Dead Birds

City/Community	Date of First Detection	Positives
	Total # of Positive Dead Birds this Year	0

Take a look at mosquito and disease activity throughout California by utilizing the VectorSurv map!

To experience the full site, visit: VectorSurv.org

Did you know Los Angeles County is serviced by five vector control districts?

Visit our Other Agencies page to find your local vector control district.

Website Accessibility Policy

Greater Los Angeles County Vector Control District is fully committed to providing accessible facilities, elements and channels of communication to all members of the public. As part of this commitment, Greater Los Angeles County Vector Control District has a policy of providing an accessible website compatible with the Web Content Accessibility Guidelines (WCAG 2.1) and commercial screen reading software. All features of the website are coded to allow individuals with vision and other impairments to understand and use the website to the same degree as someone without disabilities. We welcome feedback and can often resolve issues in a timely manner if they arise.

If you need any special assistance or accommodations:

Call us at 562-944-9656

Ongoing Compliance Information

Compliance Officer

Greater Los Angeles County Vector Control District has designated a compliance officer for website disability-related accommodations. The compliance officer has received training in website accessibility and updates the site in accordance with those best practices. Contact our accessibility officer to report an issue.

Compliance Procedures and Reports

In addition to testing with users with a wide range of disabilities and coding our website to WCAG standards, Greater Los Angeles County Vector Control District regularly scans its website to ensure ongoing compliance, and makes timely changes to any inaccessible changes, if any are found.

Linked Documents and Third Parties

Please note that this site may link out to third-party websites, such as state or federal agencies, that do not have accessible content. This site may also include documents provided by third parties included in our agenda packets, for example. While we cannot control the accessibility of content provided by third parties, we are happy to assist any member of the public with reading and accessing content on our site.

See an opportunity for us to improve? Please contact our accessibility officer or call us at 562-944-9656.

Report a Website Accessibility Issue

We are committed to your ability to access all content, and we will respond to all requests as soon as possible.