Get SF Weekly Newsletters

Wednesday, September 26, 2012

S.F. Man Infected With West Nile Virus

Posted By on Wed, Sep 26, 2012 at 7:35 AM

  • Alvesgaspar/Wikimedia
  • freeloader!

Health officials have confirmed that a San Francisco man tested positive for the West Nile Virus, the first human case since 2005. What's more, the man has not traveled outside the Bay Area, which almost certainly means he contracted the disease right here.

The good news is that the man is recovering at home, and should be just fine.

Also See: West Nile Virus Makes Its Way to San Francisco.

Health officials say they there's no way to know if the man picked up the virus in

San Francisco or one of the surrounding counties; either way, they are once again warning residents to watch out for those freeloading mosquitoes.

Last week, health officials papered neighborhoods with flyers alerting residents to the presence of West Nile Virus after they found a dead bird that had been infected with the disease. That was the third case reported since 2007.

But health officials are concerned, as West Nile Virus has been on the rise in California and across the nation. As of

Sept. 25, there were 165 human cases of WNV reported.

Nationally, 3,142 cases have been reported to the Centers for Disease

Control and Prevention, making this year the highest number of

cases reported since 2003.

Almost 40 percent of the reported cases

are from Texas. Of the 134 deaths nationwide, eight have occurred in


However, the local case is the first human to report having West Nile Virus in San Francisco since 2005 when the virus first became reportable. In 2010 one San Francisco resident became infected with the virus from an organ transplant.

The San Francisco Department of Public Health has issued a health update to all medical

providers in San Francisco, requesting that clinicians be on the lookout for

human cases of West Nile Virus and to report all cases to the local health


You should know that four out of five infected people don't usually experience any symptoms or illness. Most of those who become ill develop mild symptoms, such as fever, fatigue, nausea, headache, muscle aches, skin rash, or swollen lymph nodes. However, it does

sometimes cause more severe illness, including encephalitis or

meningitis, particularly in the elderly and in folks with not-so -great  immune systems.

WNV is most often transmitted to humans and animals through a mosquito bite. Mosquitoes become infected when they feed on infected birds (yuck). Human-to-human transmission of WNV occurs with organ transplants.

Currently, there is no human vaccine available, although several are in trials. So what can you do? Well, control those blood-sucking mosquito sources and get bug spray. Health officials have doled out the following advice:

  • Drain standing water; as little as a tablespoon of water can support mosquito breeding.

  • Report significant mosquito activity or standing water in San Francisco to DPH by calling 311

  • Report dead birds to the State WNV hotline at (877) WNV-BIRD (877-968-2473)

  • Install or repair screens on doors and windows.

  • Wear protective clothing with long pants and long sleeves (even in Oakland, where it's warmer). Treat clothing, hats, and mosquito netting with Permethrin insecticide to further discourage mosquitoes.

  • Apply an insect repellent containing at least 20 percent DEET or 20 percent Picaridin to exposed skin when mosquitoes are active. For guidance on use of DEET on children, refer to the CDC.

Good luck.
Follow us on Twitter at @TheSnitchSF and @SFWeekly

  • Pin It

Tags: , , , , ,

About The Author

Erin Sherbert

Erin Sherbert

Erin Sherbert was the Online News Editor for SF Weekly from 2010 to 2015. She's a Texas native and has a closet full of cowboy boots to prove it.


Subscribe to this thread:

Add a comment

Popular Stories

  1. Most Popular Stories
  2. Stories You Missed

Like us on Facebook


  • clipping at Brava Theater Sept. 11
    Sub Pop recording artists 'clipping.' brought their brand of noise-driven experimental hip hop to the closing night of 2016's San Francisco Electronic Music Fest this past Sunday. The packed Brava Theater hosted an initially seated crowd that ended the night jumping and dancing against the front of the stage. The trio performed a set focused on their recently released Sci-Fi Horror concept album, 'Splendor & Misery', then delved into their dancier and more aggressive back catalogue, and recent single 'Wriggle'. Opening performances included local experimental electronic duo 'Tujurikkuja' and computer music artist 'Madalyn Merkey.'"