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The California Department of Public Health has reported five more cases of West Nile Virus (WNV) in humans during the past week, bringing the total in 2018 to nine in six counties to date.
New cases have been reported in Fresno (1), Kern (1), Los Angeles (1), Sacramento (1) and San Bernardino (1) counties.
In 2017, California reported 553 human cases of WNV, 44 of which were fatal.
Los Angeles County Reports First Human Case of 2018 West Nile Virus
West Nile virus can be transmitted to humans, horses and other animals by infected mosquitoes after mosquitoes have bitten infected birds, which are the main hosts of the virus.
Most people bitten by infected mosquitoes may have flu-like symptoms or no symptoms. Those who develop symptoms may experience fever, nausea, headache and muscle aches around 3 to 14 days after the insect bite. In rare cases, a serious illness, including meningitis, encephalitis or even death, may occur. People over the age of 50 and people with weakened immune systems are at higher risk of contracting a serious West Nile virus disease.
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There is no specific treatment or vaccine against West Nile virus in humans.
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