The encephalitis vector surveillance (EVS) traps/Carbon Dioxide (CO2) Traps use dry ice (CO2) as a bait to attract female mosquitoes looking for an animal or human to bite. When searching for a source of a blood meal, mosquitoes sense where CO2 is being expelled by a living creature. Since dry ice evaporates into CO2 gas, it tricks the mosquito into thinking there is someone to bite; drawing them into the trap which uses a fan to suck them into netting collected the following day after placement. EVS/CO2 traps are used mainly to determine whether WNV (West Nile virus), SLE (St. Louis Encephalitis), WEE (Western Equine Encephalitis) or occurs within a localized area. During mosquito season, traps are set overnight once a week at variable locations throughout the District to capture mosquitoes. These live mosquitoes are identified, counted and then sent to the West Valley Mosquito and Vector Control District for disease testing.
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Website Accessibility Policy
Antelope Valley 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, Antelope Valley 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:
Antelope Valley 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,
Antelope Valley 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.