Yakima man tests positive for West Nile virus | Local

“Please remain cautious and take extra measures to protect yourself and your loved ones to avoid being bitten by mosquitoes,” said Shawn Magee, director of environmental health for the health district. “Although we have confirmed our first human case of West Nile virus, more cases may be reported.”

Transmission often continues until the first night frost, usually in late October or early November.

The health district also reported a case in a horse in Yakima County and said 16 mosquito pool samples tested positive for the virus.

Most people with West Nile virus have no symptoms. In 20% of cases, people may have fever, headache, body aches, joint pain, vomiting, diarrhea, or rash. In some cases, the virus can cause serious illness and death.

There is no specific treatment for West Nile virus. A vaccine is available that can prevent infection in horses, but it is not approved for human use.

A woman in the Tri-Cities area was diagnosed with West Nile virus in early August, according to the Benton Franklin Health District.

People are encouraged to avoid outdoor activities at dusk and dawn, wear long sleeves and pants, and use mosquito repellent. Use repellents that contain DEET, picaridin, or lemon eucalyptus oil and follow label directions carefully. Eliminate standing water where mosquitoes can lay their eggs.

Insects and mosquito traps have not been shown to reduce the risk of West Nile virus, the health district said.