West Nile virus is a viral disease of birds that is transmitted from bird to bird by way of a mosquito bite. It can occasionally cause meningoencephalitis (inflammation of the brain and spinal cord) in susceptible people or animals that are bitten by infected mosquitoes. Most people who contract the virus will have few or no symptoms and will recover completely. About 1 in 150 people who contract the disease may develop serious complications. Elderly people are more at risk of such complications. There is currently no vaccine or specific treatment available. If you think you or a family member may have West Nile virus, please contact your physician.
While the Contra Costa Mosquito & Vector Control District cannot test every bird that is collected for West Nile virus, reporting them alone are crucial to our surveillance efforts. Click here to report a dead bird.
Out of the 23 species of mosquitoes found in Contra Costa County, two species are known transmitters of West Nile Virus.
Contra Costa Mosquito And 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, Contra Costa Mosquito And 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:
Contra Costa Mosquito And 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,
Contra Costa Mosquito And 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.
