We've been fortunate this year; up until this point, no West Nile cases have been reported in Montana.

However, state and local health officials recently announced the first detection of West Nile in Montana this year.

Four counties—Blaine, Dawson, Prairie, and Wibaux—have identified mosquitoes carrying the virus.

West Nile Virus Detected In Montana Mosquitos

According to the Department of Health and Human Services, six mosquito pools in the counties listed above tested positive for West Nile virus.

According to authorities, Montana generally sees the first human or horse West Nile virus cases within about two weeks of the virus' detection.

West Nile Virus Risk Of Infection

“Infection can result in minor or severe illness, including death,” warns DPHHS Vectorborne Disease Epidemiologist Devon Cozart.

Even a mild West Nile virus can leave a person feeling fatigued and sick for weeks.

Horses are also at risk of WNV infection.

Symptoms of West Nile Virus

According to health officials, most people who are infected with West Nile virus won't have any symptoms at all.

Only about one and five people will develop a minor illness.

Symptoms of West Nile and the virus include headaches, rashes, body aches, joint pain, fatigue, vomiting, and diarrhea.

Some people will experience body aches weeks after the initial infection.

Only about one in every 150 infections develop a severe disease which is known as neuroinvasive West Nile.

This disease can cause severe neurological symptoms such as disorientation, paralysis, vision loss, and even death.

The 4 Ds of Mosquito Bite Prevention

1. DEET: Use insect repellent containing DEET or picaridin.
2. Drain: Regularly drain standing water around the house to prevent mosquito breeding.
3. Dawn/Dusk: Avoid being outdoors when mosquitoes are most active during dawn and dusk.
4. Dress: Wear long-sleeved shirts and pants to reduce exposure to mosquito bites.

For more information about WNV protection and surveillance activities, contact your local health department or the Montana Department of Public Health and Human Services.

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