The California Department of Public Health reported five additional human West Nile virus (WNV) cases in the past week, bringing the total in 2018 to nine in six counties to date.

Image/francok35
Image/francok35

The new cases were reported from Fresno (1), Kern (1), Los Angeles (1), Sacramento (1), and San Bernardino (1) counties.

In 2017, California reported 553 human WNV cases, including 44 fatalities.

Los Angeles County reports 1st human West Nile virus case of 2018

West Nile virus can be transmitted to humans, horses and other animals by infected mosquitoes after the mosquitoes have bitten infected birds, which are the primary hosts of the virus.

Most people bitten by infected mosquitoes may experience mild flu-like symptoms or no symptoms at all. Those whom develop symptoms may experience fever, nausea, headaches and muscle aches approximately 3 to 14 days after the insect bite. In rare cases, severe illness including meningitis, encephalitis, or even death can occur. People older than 50 and individuals with weakened immune systems are at higher risk for severe illness from West Nile virus.

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There is no specific treatment or vaccine for West Nile virus in people.

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