Most people with the virus have no clinical symptoms of illness, but some may become ill three to 14 days after the bite of an infected mosquito. According to the Centers for Disease Control and Prevention, as of January 9, 2018, a total of 47 states and the District of Columbia reported West Nile virus infections in people, birds, or mosquitoes in 2017.
Residents are urged to inspect their homes and yard for sources of standing water where these mosquitoes are likely to breed, the release stated. Symptoms are usually mild and include fever, headache and body aches, but serious illness, such as encephalitis and meningitis, and death are possible.
A San Gabriel Valley resident was hospitalized in May with the disease, which is spread by the bite of an infected mosquito. "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", said Jared Dever, District Manager of the San Gabriel Valley Mosquito and Vector Control District.
Last year, 63 counties in IL reported a West Nile virus positive batch, bird and/or human case.
The county Department of Public Health does not cover the cities of Pasadena or Long Beach, which have their own health agencies, but neither city has yet reported any human West Nile cases.
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According to the Centers for Disease Control and Prevention, cases of flea-, mosquito-, and tick-borne diseases more than tripled from 2004 until 2016. As for Zika, 108 cases have been reported from 2015 through June 1. Last year's WNV season was the longest season on record extending until mid-December. Adults 60 years old and older have the highest risk of severe illness caused by West Nile virus.
A mosquito bite could lead to many different types of diseases, whether rare or common.
Avoid mosquito-infested areas at dawn and dusk.
Use repellents containing DEET, picaridin, or oil of lemon eucalyptus. Fix or replace screens that have tears or holes. These are prime breeding grounds for mosquitoes. Try to keep doors and windows shut, especially at night.
Empty and wash birdbaths and wading pools weekly.