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Horse tests positive for West Nile, despite possibile vaccination

Flickr member Enrique Dans

An active case of West Nile Virus was reported in San Luis Obispo County Thursday, the first detected this year in the area. Santa Barbara and Monterey Counties still remain free of any reported activity.

Public Health says a horse in north county San Luis Obispo—whose owner says was vaccinated against the disease—tested positive for the virus.

The Centers for Disease Control and Prevention says West Nile can be fatal in 3 to 15 percent of human cases and is more serious for those older than 50.

The lack of West Nile activity on the Central Coast has been in great contrast to the rest of the state this year, where a record number of infected mosquitoes have turned up.

More than 300 human cases have been reported statewide with the largest concentration of those in Orange County.