The virus is transmitted to humans and animals through a mosquito bite.
Those 60 and older with a weakened system are at a higher risk of severe illnesses caused by West Nile virus like meningitis or even death. Most people who contract the virus have no clinical symptoms of illness, but some may become ill three to 15 days after the bite of an infected mosquito.
"By working together with the community, we will continue to reduce the risk of West Nile virus and keep our community safe and healthy".
According to the California Department of Public Health, one other human case - in Kern County - has been reported so far this year, for a total of four statewide.
Residents are urged to inspect their homes and yard for sources of standing water where these mosquitoes are likely to breed, the release stated.
The Culex mosquito carries West Nile virus.
The most recent findings from the Denton County West Nile case log lists 12 cases of West Nile as of January 8 and 83 mosquito pools in Denton - 18 of which are positive for West Nile. "Taking just a few minutes to remove any standing water from your yard, apply recommended mosquito repellents and ensure your window and door screens are free of holes can help protect you and your community from this risky disease".
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Nesemeier says fever body aches, a stiff neck, or a rash can be general symptoms that someone wouldn't typically associate with West Nile.
Vector control officials have netted mosquito samples in eastern and western county areas where the virus was present. Reported cases from mosquito and tick bites in IL have increased by more than half (58 percent) from 2005 to 2016.
The Bell County Public Health District added that mosquitos are most active around dawn and dusk.
Avoid spending time outside when mosquitoes are most active, especially at dawn and dusk, and wear long trousers, long-sleeved shirts and other protective clothing outside.
Use mosquito repellent that contains DEET.
If water is stored in rain barrels or other containers for longer than a week, cover all openings with tight fitting lids or 1/16-inch fine mesh screen. These are prime breeding grounds for mosquitoes.
Make sure doors and windows have tight-fitting screens.