The Cascade County Weed & Mosquito Division said in a press release on Monday afternoon that it has detected its first West Nile Virus- positive mosquito sample of the year.
A WNV positive sample of adult Culex tarsalis mosquitos was collected approximately six miles north of Great Falls on Thursday, July 12.
The sample was confirmed to be West Nile Virus positive by the lab at the Montana Department of Public Health & Human Services in Helena on Monday.
There has been no known infection in humans detected in Cascade County so far this year, but since a WNV positive mosquito sample has been detected, residents are encouraged to take steps to protect themselves.
Approximately 80% of people infected experience no symptoms, but up to 20% can develop a mild illness, called West Nile fever.
West Nile fever generally resolves itself without treatment, but dangerous brain infections such as encephalitis or meningitis can develop in 1 out of 150 people, according to the press release. Symptoms of these diseases might include headache, rash, high fever, stiff neck, mental confusion, muscle weakness, tremors, convulsions, coma, and paralysis. People who develop any of these symptoms should see their healthcare provider immediately.
The best defense against WNV is bite prevention.
To protect yourself, public health officials stress the "4 Ds" of prevention:
- DEET-Apply repellent containing an EPA-registered active ingredient, such as DEET, and follow the directions on the package.
- DUSK and DAWN-This is when mosquitoes are most active. Try to avoid outdoor activities during these times.
- DRAIN STANDING WATER-Standing water is the perfect breeding ground for mosquitoes. Drain such areas around your home (gutters, pools, tires, buckets, water bowls, etc.).
- DRESS APPROPRIATELY-Wear long-sleeved shirts, long pants, and socks.
For more information about West Nile Virus, visit the Centers For Disease Control & Prevention website.
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