Health

San Mateo County Reports Its First Cases Of West Nile Virus This Year

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An Asian Tiger mosquito feeds from the blood from a person. (Jack Leonard/New Orleans Mosquito and Termite Control Board/Getty Images)

An Asian Tiger mosquito feeds from the blood from a person. (Jack Leonard/New Orleans Mosquito and Termite Control Board/Getty Images)

CBS SF Bay (con't)

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SAN MATEO (KCBS)— Two dead birds found in San Mateo have tested positive for West Nile virus, the San Mateo County Mosquito and Vector Control District announced on Tuesday.

A Scrub Jay was reported Thursday in the Hillsdale area east of Alameda De Las Pulgas and an American Crow was reported Sunday in the Hayward park area, San Mateo County Mosquito and Vector Control District Vector Ecologist Theresa Shelton said.

They are the county’s first cases of West Nile virus this year, according to the district.

As of Friday, 20 cases of West Nile virus have been found in seven counties statewide, which includes one human case in Sacramento County, according to the California Department of Public Health.

The San Mateo County Mosquito and Vector Control District reported five positive cases of West Nile virus found in birds last year.

Birds are the primary hosts of the virus, which are transmitted by an infected mosquito’s bite.

“West Nile virus activity is likely to increase as we head into the summer months,” Shelton said.

The district will be putting out mosquito traps in the neighborhoods and testing mosquitoes for West Nile virus in the coming weeks, Shelton said.

To prevent mosquito breeding people are advised to drain standing water in flower pots, rain gutters, pet bowls and others places where mosquitoes tend to lay their eggs.

Anyone who finds bird or tree squirrel carcasses are advised to report them to the West Nile virus hotline at (877) 968-2473 or online at www.westnile.ca.gov.

(Copyright 2013 by CBS San Francisco. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. Wire services may have contributed to this report.)

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