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Seattle & King County
401 5th Ave., Suite 1300
Seattle, WA 98104

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Phone: 206-296-4600
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Home » Press Release Archives » 5-19-04: West Nile virus in 2004

West Nile virus expected in King County in 2004, Public Health says
Wednesday, May 19, 2004

KING COUNTY, WASHINGTON - Today, Dr. Alonzo Plough, Director of Public Health - Seattle & King County said that King County should expect to see cases of West Nile virus this summer, but that the public can protect itself by removing artificial mosquito habitat and taking steps to avoid getting bitten by mosquitoes.

"West Nile virus is highly preventable, if people take sensible precautions," said Dr. Plough. "We all need to be on the alert for mosquitoes, and avoid being bitten."

Dr. Plough offered the following suggestions:

  • Remove standing water near your home
  • Repair screens on windows and doors
  • Wear clothing with full coverage when mosquitoes are biting
  • Use an insect repellent to keep from being bitten

Not all mosquito species that live in King County are capable of carrying the West Nile virus, and not all capable carriers are infected. Dr. Sharon Hopkins, Public Health - Seattle & King County's veterinarian, said that the mosquito of biggest concern was Culex pipiens, or the northern house mosquito.

Culex pipiens prefers to lay eggs in small amounts of standing water commonly found around houses in buckets, wheelbarrows, clogged drains and discarded tires. Removing this habitat will reduce the number of mosquitoes near people's homes.

Dr. Plough and Dr. Hopkins also discussed how people can report dead crows and other birds to Public Health. A small percentage of reported crows will be tested for West Nile virus, but Public Health's emphasis is on recording where the dead birds were found. A spike in bird deaths may indicate that West Nile virus has arrived, and possibly the areas of the county where the virus is circulating.

In 2003 West Nile virus killed over 250 people in the United States, and nearly 10,000 illnesses were confirmed by the (Centers for Disease Control and Prevention) CDC. Many more people were likely sickened by the virus, but did not seek medical care.

Experts believe that 20% of people bitten by an infected mosquito come down with West Nile fever, which may result in illness that ranges from mild to severe, flu-like symptoms. One-in-150 infected people have more serious neurological illnesses such encephalitis or meningitis. The majority of people bitten by infected mosquitoes do not experience any symptoms.

West Nile virus is a mosquito-borne virus that is spread to humans through the bite of an infected mosquito. A mosquito becomes infected by biting an infected bird that carries the virus. West Nile virus is not spread by person-to-person contact, nor is it transmitted directly from birds or other animals to people. Mosquito season, when West Nile virus is of most concern, runs from spring through late fall.

Tips for reducing habitat and preparing the home:

  • Tip out barrels, buckets and wheelbarrows
  • Tip out containers such as toys, cans or plant saucers
  • Empty children's wading pools when not in use
  • Change water in birdbaths and animal troughs at least once a week
  • Get rid of used tires
  • Clean garden ponds
  • Recycle old bottles, buckets and cans
  • Clean leaf-clogged gutters
  • Empty water from flower pot dishes
  • Dump water off of tarps and plastic sheeting
  • Repair leaky outdoor faucets
  • Cover rain barrels with mosquito screens
  • Repair ripped windows and door screens and make sure they fit tight
  • Consider adding a screen door to doors that often are left open

Tips to avoid getting bitten when mosquitoes are out - often at dawn and dusk:

  • Wear long sleeve shirts and long pants. Hats are also useful.
  • Consider using an insect repellent. Repellents containing the chemical N,N-diethyl-meta-toluamide (DEET) are known to be very effective. It is important to read the label and follow the instructions on the label carefully.

More information:

# # #

Updated: Wednesday, May 19, 2004 at 12:51 PM

All information is general in nature and is not intended to be used as a substitute for appropriate professional advice. For more information please call 206-296-4600 (voice) or TTY Relay: 711. Mailing address: ATTN: Communications Team, Public Health - Seattle & King County, 401 5th Ave., Suite 1300, Seattle, WA 98104 or click here to email us. Because of confidentiality concerns, questions regarding client health issues cannot be responded to by e-mail. Click here for the Notice of Privacy Practices. For more information, contact the Public Health Privacy Office at 206-205-5975.

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