JACKSON, Wyo. — The Wyoming Department of Health (WDH) is reminding people to protect themselves from mosquito bites this summer to help prevent West Nile virus (WNV).

“We have already had mosquitoes with positive tests for WNV this season,” said Courtney Tillman, epidemiologist with the WDH. “As the weather warms up and we spend more time outdoors, we need to remember to take steps to prevent mosquito bites and potential WNV infection.”

Earlier this week, the City of Cheyenne Weed & Pest reported that mosquitoes from multiple locations in Cheyenne had tested positive for WNV. City of Cheyenne Weed & Pest Manager Steven Trowbridge told Buckrail that they test mosquito pools one to two times per week. So far this year, seven out of 113 samples have tested positive.

No human cases have been reported.

“Mosquitoes acquire the virus from infected birds when taking a blood meal and are capable of infecting other birds during additional feedings,” Trowbridge wrote. “An infected bird has the potential to carry the virus a substantial distance.”

According to WDH, the virus is spread to humans through bites from infected mosquitoes. Most people with WNV don’t have symptoms, but if symptoms develop, they can include fever, headache, body aches, skin rash and swollen lymph nodes. Symptoms can begin up to two weeks after a mosquito bite. People over the age of 50 with chronic diseases are more likely to develop serious illness.

Follow these tips to prevent mosquitoes near the home and to prevent mosquito bites:

  • Drain standing water – Mosquitoes lay eggs in shallow, still water. Drain water or get rid of objects that hold water, and keep gutters clean and free of debris.
  • Kill mosquito larvae – Use larvicides in water that does not drain, such as ornamental ponds and water features.
  • Use window screens – Use tightly-fitted screens in windows to prevent mosquitoes from coming indoors.
  • Keep lawns trimmed and free of weeds – Mosquitoes like to use tall grass and weeds as resting spots.
  • Use insect repellent – When outdoors, use a repellent approved by the Environmental Protection Agency that contains DEET, picardin, lemon eucalyptus oil or IR3535.
  • Wear long-sleeved shirts and pants – Treating outdoor clothing with permethrin can add an extra layer of protection.
  • Avoid dawn and dusk – Mosquitoes that carry WNV are most active during dawn and dusk. Avoid being outdoors during these times.

Monica is a Staff Reporter who studied journalism at Syracuse University and has been in the valley since 2015. She loves writing about the local food and bev scene, especially craft beer. When she’s not on the clock, you can find her paddle boarding, sewing, or whipping up a new recipe at home.