Mosquito pool tests positive for West Nile Virus

VENTURA, California – On September 19, 2017, the Ventura County Environmental Health Division received confirmation from the California Department of Public Health that mosquitoes collected in the first week of September from the Wood Ranch Marsh in Simi Valley tested positive for the West Nile virus.

These are the first mosquitoes collected in 2017 to test positive for West Nile in Ventura County. One bird tested positive for the virus in the Simi Valley area earlier this year. West Nile virus is established in Ventura County and additional discoveries are expected.

Environmental Health monitors and controls mosquito breeding sources throughout Ventura County. Samples were collected at all of the mosquito breeding sources in the area where these mosquitoes were found and will be inspected and treated if evidence of mosquito breeding is observed.

Environmental Health also advises the public to take the following precautions to minimize exposure to the West Nile virus:
• Eliminate standing water from your property.
• Make sure doors and windows have tight-fitting screens without holes.
• When outdoors, wear long pants and long-sleeved shirts and limit activity especially at dawn and dusk.
• When outdoors, apply insect repellent.

West Nile virus not only affects humans, it can also affect horses. For information on the virus in horses, owners should contact their veterinarian.

To report any potential mosquito breeding sources in Ventura County, the public can call the mosquito complaint hotline at: (805) 658-4310. Environmental Health also provides mosquito-eating fish to the public to use in non-maintained swimming pools, ornamental ponds and similar water features. To request mosquito-eating fish call: (805) 662-6582.

To report wild birds that have died recently, call the California Department of Public Health at: 877-WNV-Bird (877-968-2473).

More information about mosquito control and surveillance efforts in Ventura County can be found on the Environmental Health Division’s website:

http://vcrma.org/envhealth/technical-services/vector/index.html

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