First West Nile virus case discovered in 2021 in Bear Lake County

West Nile mosquito | Photo file

The following is a press release from the Southeast Idaho Public Health District.

BEAR LAKE – Public health officials in Southeast Idaho have confirmed the identification of the very first pool of mosquitoes positive for West Nile virus in Bear Lake County, located at the southern end of the county near the Utah-Idaho border on the west side of the lake. This is the first pool of WNV positive mosquitoes in the eight departments of SIPH for 2021.

West Nile is a potentially serious disease that is usually spread to animals and humans through the bite of an infected mosquito. Most people infected with West Nile do not have symptoms, more serious illnesses can occur. People with symptoms may have fever, headache, body aches, fatigue, nausea, vomiting, eye pain, and sometimes swollen lymph nodes or a rash usually occurring two to 14 days after treatment. bite of an infected mosquito. More serious infections can involve the central nervous system.

To reduce the risk of WNV, the following precautions should be taken:

  • Outdoors, use an insect repellant that contains an active ingredient registered by the EPA, such as DEET or Picaridin (apply according to manufacturer’s instructions.) Additionally, some products containing permethrin are recommended for use on clothing, shoes, mosquito nets and camping equipment. Follow the directions on the package.
  • Use insect repellant and wear long sleeves, pants, and loose clothing at dawn and dusk when mosquitoes are most active and feeding. If possible, consider staying indoors during these hours.
  • Make sure you have good screens on windows and doors to keep mosquitoes out.
  • Get rid of mosquito breeding sites by draining standing water from flowerpots, buckets and barrels. Change the water in animal dishes and replace the water in birdbaths and feeders, at least twice a week. Drill holes in swings or old tires for the water to drain. Keep children’s wading pools empty or on their side when not in use.
  • Do not overwater your lawns, gardens or pastures.

For more information on the WNV visit the SIPH website or Click here.


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