SAN DIEGO (FOX 5/KUSI) -- Mosquitoes in Imperial County tested positive for a virus that causes brain inflammation, the county health department announced.

A mosquito pool collected near Palm Avenue in the City of Brawley that was tested on Aug. 25 came back positive for Saint Louis Encephalitis (SLE), a severe neuroinvasive disease that often involves encephalitis, an inflammation of the brain, the Imperial County Health Department announced Friday.

The CDC and county health department says there are no vaccines to prevent or medicines to treat St. Louis Encephalitis, which is spread to people through the bite of an infected mosquito.

Symptoms include fever, headache, nausea, vomiting and tiredness.

The CDC says the St. Louis Encephalitis virus causes some people to develop a neuroinv

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