LOS ANGELES --
The West Nile virus is spreading in birds and mosquitoes in Los Angeles County, according to health officials.The Greater Los Angeles County Vector Control District said two infected mosquito samples were collected from Woodland Hills and Pico Rivera and two dead virus-infected birds were found in Hacienda Heights and Winnetka.
In the state of California alone, there have been 45 human cases of the potentially deadly virus in 2010 so far.
Mosquito bites are the most common rote of infection.
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