After a dead American crow found in the Willows area of Menlo Park tested positive for West Nile virus on April 20, the county's Mosquito and Vector Control District collected and tested mosquitoes in the area. The mosquitoes tested negative for West Nile virus, the county reported on April 24.
The mosquito control district continues to conduct West Nile virus surveillance throughout San Mateo County, said Megan Caldwell, the county's public health education officer.
Residents are asked to help by reporting fresh carcasses of birds or tree squirrels to the California West Nile Virus Hotline at westnile.ca.gov or by calling (877) 968-2473.
Go to smcmvcd.org or call 344-8592 to contact the district.
● Earlier story: Dead bird in Menlo Park tests positive for West Nile virus.