Five counties in California have reported signs of West Nile Virus this year.
They are Los Angeles, Tulare, Fresno, Yuba, and now San Joaquin County where 2 mosquito samples found along its southern border tested positive for West Nile.
Aaron Devencenzi from San Joaquin County Mosquito Control says this is the earliest that West Nile has been found in almost 10 years.
"Well something like this certainly sets us up for a lot of West Niles Virus being found throughout the summer, so there is a risk to the human population, and we really want people to take precautions against mosquitoes," says Devencenzi.
No human cases of the virus have been found in the state this year.
In 2012 the number of human cases tripled to almost 500 statewide. And last year the virus was found in 42 of California's 58 counties.
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