Orange County Mosquito and Vector Control District

Child tests positive for West Nile virus in O.C., …

A field sample of mosquitoes that could carry West Nile Virus is seen at offices of the Riverside County Department of Environmental Health on April 26, 2007, in Hemet. (David McNew/Getty Images)

Top Orange County Mosquito and Vector Control District Headlines

Mosquitoes infected with West Nile virus found in 3 Orange …

Culex mosquitoes, which most Californians are familiar with, spread West Nile virus. (Credit: Bob Chamberlin / Los Angeles Times)

O.C. sees rise in mosquito activity as neighboring counties …

A field sample of mosquitoes that could carry West Nile Virus is seen at offices of the Riverside County Department of Environmental Health on April 26, 2007, in Hemet. (David McNew/Getty Images)

Mosquitoes With St. Louis Encephalitis Virus Found in …

A mosquito is seen on a person's arm on Aug. 23, 2016, in Lille, France. (Credit: PHILIPPE HUGUEN/AFP/Getty Images)

2 L.A. County Residents Recovering From West Nile; Virus …

A field sample of mosquitoes that could carry West Nile Virus is seen at offices of the Riverside County Department of Environmental Health on April 26, 2007, in Hemet. (David McNew/Getty Images)

More Than 2 Dozen Mosquitoes Test Positive for West Nile …

Culex mosquitoes, which most Californians are familiar with, spread West Nile virus. (Credit: Bob Chamberlin / Los Angeles Times)

O.C. Officials Warn of West Nile Virus as 1st Infected …

Culex mosquitoes, which most Californians are familiar with, spread West Nile virus. (Credit: Bob Chamberlin / Los Angeles Times)

More Orange County Mosquito and Vector Control District

Newport Harbor High School Students, Teachers Stage …

The campus of Newport Harbor High School in Newport Beach, Calif. on Nov. 28, 2012. Vector control learned of complaints of a rat infestation at the Newport Beach campus on Tuesday from the Orange County Environmental Health Division. (Credit: Mark Boster / Los Angeles Times)

Invasive Mosquito Population Spikes 330 Percent in …

A female mosquito begins to bite a photographer's hand. (Credit: Tom Ervin/Getty Images)

‘It’s a Big Mystery’: Authorities Baffled After Dozens …

Officials Investigate After Lake Forest Elementary …

O.C. West Nile Spraying Suspended Over Lack of Disneyland …