Stay Safe from Mosquitoes this Labor Day Weekend

Additional West Nile virus and more Saint Louis encephalitis virus activity confirmed

LOS ANGELES – 8/29/2016 – As the holiday weekend approaches, the Greater Los Angeles County Vector Control District (GLACVCD) is urging residents to use insect repellent and remove standing water to prevent further spread of West Nile virus (WNV) and Saint Louis encephalitis virus (SLE).

This past week, GLACVCD detected one additional SLE-positive mosquito sample in La Mirada. SLE is transmitted to humans by the bite of an infected mosquito, just like West Nile Virus. The viruses share the same symptoms: fever, headache, nausea and tiredness. Most people infected will not exhibit apparent symptoms. People who spend time outdoors when mosquitoes are active, such as dawn and dusk, are at increased risk. There is no cure or vaccine for WNV or SLE.

This past week, GLACVCD also confirmed 37 West Nile virus-positive mosquito samples and eight dead birds that tested positive for the virus. West Nile virus, similar to SLE, is primarily found in birds, and is transmitted between birds and to people and horses by mosquito bites. Learn more about West Nile and Saint Louis encephalitis viruses

Vector control detected WNV activity for the first time this year in the following cities or communities:

  • Commerce
  • South Park neighborhood (Los Angeles)
  • Norwalk
  • Silver Lake
  • Toluca Lake

See ALL cities with confirmed West Nile Virus


“If you are spending time outdoors, such as during Labor Day weekend, don’t forget about insect repellent,” said Levy Sun, the District’s public information officer. “Mosquitoes are more than just annoyances; One bite from these insects can mean a trip to the hospital or worse.”

See more tips on preventing mosquito breeding and staying bite-free

Invasive Aedes Mosquitoes Update

GLACVCD staff is also advising residents to be vigilant against invasive Aedes mosquitoes. These day-biting black-and-white mosquitoes have been confirmed in additional communities in Los Angeles County.

Residents experiencing mosquito problems during the day or at night, even after dumping all standing water, can receive help from the Greater Los Angeles County Vector Control District at (562) 944-9656 or visit