The state Department of Health Services has monitored the spread of West Nile virus since 2001 among wild birds, horses, mosquitoes and people. About one in five people who are infected develop a fever and other symptoms.
There are no vaccines against West Nile, KDHE says.
She says the Mosquito Abatement programs throughout the state are critical for keeping health departments informed about pools of active mosquitos.
Although no human cases of WNV have been confirmed health officials are urging residents to take precautions.
WNV is most commonly transmitted to humans by the bite of an infected mosquito. Water troughs or buckets should be emptied, cleaned, and refilled every two to three days, if possible, to remove any mosquito eggs or larvae.
However, across California in 2017, 600 people tested positive for the virus and 44 people died.
Doors - Make sure doors and windows are in good repair and fit tightly, and fix torn or damaged screens to keep mosquitoes out of the house.
Consider the use of mosquito repellent, according to directions, when it is necessary to be outdoors. The agency issued a warning to residents of the North Shore that the level of West Nile virus activity is moderate and increasing.
Wear shoes, socks, long trousers, and a long-sleeved shirt when outdoors for long periods, or when mosquitoes are most active.
The department renewed calls for people to avoid mosquito bites by using repellant, wearing long trousers and long-sleeved shirts when outdoors for extended periods and avoiding perfumes and colognes when outdoors. Drill holes in tire swings so water drains out.
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