West Nile Virus is carried by mosquitos





News Release [ [link removed] ]




*For immediate release:* Sept. 25, 2023                         (23-129)

*Contact:* DOH Communications  <[email protected]>

*West Nile virus reported in humans and horses from four counties in Washington state *

"West Nile Virus is carried by mosquitos "

*OLYMPIA* – The Washington State Department of Health, Benton-Franklin Health District, and Walla Walla County Department of Community Health have confirmed two cases of West Nile virus in residents from Walla Walla and Franklin counties, diagnosed within the past week. Both people were most likely exposed within their county of residence.

In addition, today WSDA announced two horse cases of West Nile virus [ [link removed] ], in Grant and Benton counties most likely exposed within their counties..

We caution the public to avoid mosquito bites, contact your healthcare provider if you develop symptoms consistent with West Nile virus, and encourage human and animal healthcare providers to consider West Nile virus in patients with symptoms. Horses can be vaccinated for West Nile virus, with an annual booster shot available. There is currently no West Nile virus vaccine available for humans. 

“Most cases of West Nile virus are mild. However, serious illness and death are also possible. That’s why we urge people to take precautions to avoid mosquito bites and to contact their healthcare provider if they develop symptoms," said Dr. Amy Person, WA DOH Regional Medical Officer - Benton-Franklin Health District.

West Nile virus is a virus carried by mosquitos that can cause illness in people and animals. Disease due to West Nile virus occurs during mosquito season in Washington state, which starts in the summer and continues through the early fall. Washington state sees a few cases of West Nile virus every year, particularly in areas with hot summer temperatures. The virus is most often reported in south central Washington, but it has been identified throughout the state.

Most people and animals who are bitten by mosquitos infected with West Nile virus develop no symptoms. About 1 in 5 people who are infected will develop fever with other symptoms such as headache, body aches, joint pains, vomiting, diarrhea, or rash. Most people recover completely, but fatigue and weakness can last for weeks or months. Serious illness occurs in less than 1 in 100 people infected with West Nile virus. The risk of severe infection is highest among people 60 or older and people with certain medical conditions such as cancer, diabetes, hypertension, and kidney disease.

The best protection measures against diseases carried by mosquitos are bite prevention and habitat reduction.

* **Avoid mosquito bites: *


* *Use EPA-registered insect repellent* when spending time in areas with mosquitos. Read the label and carefully follow instructions. 
* Use screens on windows and doors, and repair holes in screens to keep mosquitos outside. *Stay indoors* at dawn and dusk, if possible, when mosquitoes are the most active. 
* *Cover up.* Wear a long sleeve shirt, long pants, and a hat when going into areas with mosquitos. 
* *Treat clothing and gear* with permethrin to kill or repel mosquitos.

*Mosquitoes require water for their larvae*, such as puddles that gather in tarps, old tires, buckets, and clogged roof gutters; removing such prime breeding habitat helps control mosquito populations. Take steps to remove mosquito habitat:


* First, *identify sources of standing water* such as tires, buckets, planters, toys, pools, birdbaths, animal troughs, flowerpots, trash containers or other places where standing water may collect. 
* *Empty anything that holds standing water*. If emptying is not possible, cover water sources or change water at least twice per week.

Each year, DOH works with the Washington Department of Fish & Wildlife, the Washington State Department of Agriculture, local public health agencies, mosquito control districts, and academic partners to monitor the virus in mosquitos, birds, horses and other animals, and people. Data is updated in real-time on the DOH website [ [link removed] ]. In addition to the cases announced here, 80 mosquito pools, from Yakima, Grant, and Benton counties, have tested positive this season for West Nile virus.

Learn more about West Nile virus and the steps you can take to protect, yourself, your family, and animals here: [link removed]

Contact: Washington State Department of Health (DOH): Mark Johnson, [email protected]

 

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