Post Theresa Shelton

First Positive Bird of 2017 in San Mateo County

It is unusual to detect West Nile Virus in dead birds during the winter months.  West Nile Virus season begins mid-April, with most activity in the summer.  However, residents can report some species of dead birds (crows, ravens, scrub-jays, finches, sparrows, hawks and owls) year-round online at westnile.ca.gov and the District laboratory will test fresh specimens without signs of trauma (roadkill or partially decomposed specimens cannot be tested).The first West Nile Virus positive bird of 2017 in San Mateo County was detected in Redwood City. The bird was an American crow, reported on January 30. Statewide, this was the second West Nile Virus positive bird of 2017 (the first was in San Diego). Laboratory staff conducted typical surveillance, setting traps for mosquitoes in the surrounding neighborhood. The traps did not reveal a high mosquito population or any other unusual circumstances. All Culex mosquitoes captured were tested for West Nile Virus in the District laboratory, and all were negative.

It is unusual to detect West Nile Virus in dead birds during the winter months.  West Nile Virus season begins mid-April, with most activity in the summer.  However, residents can report some species of dead birds (crows, ravens, scrub-jays, finches, sparrows, hawks and owls) year-round online at westnile.ca.gov and the District laboratory will test fresh specimens without signs of trauma (roadkill or partially decomposed specimens cannot be tested).

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