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West Nile Virus Update

The Orange County Mosquito and Vector Control District (OCMVCD) confirmed West Nile virus (WNV) activity for the first time this year in the following cities:


  • Costa Mesa
  • Dana Point
  • Huntington Beach
  • Santa Ana


West Nile virus is transmitted to people and animals though the bite of an infected mosquito. Mosquitos acquire WNV when they feed on infected birds, and then pass the virus along when they bite humans. In areas where West Nile virus has been detected, OCMVCD staff are deployed to canvass te area to look for mosquito breeding sources, expand public education, and work with city officials to correct infrastructure issues.


With increasingly warm average daily temperatures, above average mosquito samples and dead birds, and a human infection in a neighboring country, the current risk of WNV transmission has been assessed as elevated.


The Orange County Mosquito and Vector Control District makes the following recommendations to help reduce teh threat of mosquitoes and West Nile virus in Orange County:


  • eliminate any standing water around your home or office
  • make sure all window and door screens on your house are in good repair
  • wear a repellent containing DEET, Picaridin, Oil of Lemon Eucalyptus, or IR 3535
  • contact the OCMVCD to report dead birds or neglected pools

Contact 714-971-2421 or 949-654-2421 or for more information.