News Release
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313 N. Figueroa Street, Room 806  |  Los Angeles, CA 90012  |  (213) 240-8144  |

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For Immediate Release:

July 18, 2012

First Human Case of West Nile Virus of 2012 Reported in LA County
Reminder to all residents to take precautions against mosquitoes

LOS ANGELES - The first human case of West Nile virus (WNV) in 2012 has been reported in the county. The middle-aged adult, who lives in the San Gabriel Valley, was hospitalized for a short time earlier this month and has other chronic health conditions not related to WNV. The patient is now home and expected to recover. West Nile virus is passed to people through the bite of an infected mosquito; mosquitoes obtain the virus by feeding on infected wild birds. The Los Angeles County Health Officer would like to remind all residents to take precautions against mosquito bites.

"While most people bitten by a mosquito are not exposed to West Nile virus, some individuals may become infected with this disease and may experience symptoms that can last for months, or even years, such as fatigue, malaise, and depression," said Jonathan E. Fielding, MD, MPH, Director of Public Health and Health Officer. "I urge all residents to protect themselves and their family and friends from mosquito bites by getting rid of stagnant water around their homes; wearing long-sleeved shirts and long pants when outdoors; and using a repellant when in mosquito-prone areas, especially around dawn or dusk."

As of today, vector control districts have detected WNV in 16 dead birds in LA County. The samples were taken in various parts of Los Angeles County, demonstrating that the virus can affect any location. While agencies such as the Greater Los Angeles County Vector Control District and the San Gabriel Valley Mosquito and Vector Control District are actively treating areas with high mosquito populations, residents are urged to do their part.

"Vector control agencies in LA County cannot do it alone. It is imperative that the public help us by minimizing the risk of being bitten and removing sources of water on their property that can breed mosquitoes. This is not a virus to take lightly," said Kenn Fujioka, District Manager for the San Gabriel Valley Mosquito and Vector Control District. "Additionally, residents should report dead birds, and also report sources of standing water to their local vector control agencies."

  • Dead birds may be reported by calling (877) 968-2473 or logging onto
  • Stagnant swimming pools or green pools should be reported to the Public Health Environmental Health Bureau at (626) 430-5200, or to a local vector control agency.
  • More about West Nile Virus:

  • WNV is not spread though person-to-person contact or directly from birds to humans.
  • Most mosquitoes do not carry the virus.
  • In most cases, people who are infected with West Nile virus never become sick, or have only very mild symptoms that include fever, headache, nausea, body aches, and a mild skin rash.
  • Symptoms of WNV could appear within three to 12 days after infection.
  • Fewer than one in 150 people who are bitten by an infected mosquito become severely ill, according to the Centers for Disease Control and Prevention (CDC). In these rare cases, the virus can cause encephalitis and even death.
  • People over 50 years of age and those with weakened immune systems are most at risk for developing severe symptoms, which may require hospitalization.
  • Recovery from any infection with the virus can take months to years, and some individuals may never fully recover.
  • There is no specific treatment for this disease.
  • More tips to decrease risk of infection:

  • Repellants containing DEET, picaridin, or oil of eucalyptus, when used as labeled, are effective defenses against mosquitoes.
  • Check window screens for holes.
  • Do not allow water to collect and stagnate in old tires, flowerpots, swimming pools, birdbaths, pet bowls, or other containers. These are prime breeding grounds for mosquitoes.
  • Clean and chlorinate swimming pools; drain water from pool covers.
  • Stock garden ponds with goldfish or other mosquito- eating fish. These eat mosquito eggs and larvae.
  • Empty and wash birdbaths and wading pools weekly.
  • More information:

  • Information on West Nile Virus by phone: (800) 975-4448.
  • Information on West Nile Virus on the web:
  • Where to call with questions about mosquitoes:

  • Greater Los Angeles County Vector Control District: (562) 944-9656
  • Los Angeles County West Vector Control District: (310) 915-7370
  • San Gabriel Valley Mosquito and Vector Control District: (626) 814-9466
  • Antelope Valley Mosquito and Vector Control District: (661) 942-2917
  • Compton Creek Mosquito Abatement District: (310) 933- 5321
  • Pasadena City Health Department: (626) 744-6004
  • City of Long Beach Vector Control Program: (562) 570- 4132
  • The Department of Public Health is committed to protecting and improving the health of the nearly 10 million residents of Los Angeles County. Through a variety of programs, community partnerships and services, Public Health oversees environmental health, disease control, and community and family health. Public Health comprises nearly 4,000 employees and has an annual budget exceeding $750 million. To learn more about Public Health and the work we do please visit, visit our YouTube channel at, find us on Facebook at, or follow us on Twitter: LAPublicHealth.

    Report dead birds | More about West Nile virus