West Nile virus detected in 11 mosquito pools
Aug 6, 2025, 6:15 PM | Updated: 7:52 pm
Vector control intern Abby Pickett sorts mosquitoes by type at the Salt Lake Mosquito Abatement laboratory in Salt Lake City on Thursday, May 27, 2021. Samples collected in Cache County have tested positive for West Nile virus. (Laura Seitz/Deseret News)
(Laura Seitz/Deseret News)
SALT LAKE CITY — 11 mosquito pools in Davis County tested positive for West Nile virus, according to the mosquito abatement district’s Facebook.
West Nile was detected in the following cities, as of July 31:
- West Point
- Fruit Height
- Layton
- Kaysville
- Farmington
- Syracuse
- West Bountiful
According to the Centers for Disease Control, cases mostly occur during summer and autumn, which are the mosquito seasons.
Most of the people infected with West Nile do not experience any symptoms. However, some may experience flu-like symptoms, including headache, joint pains, vomiting, diarrhea or a rash.
The CDC said approximately 1 in 150 people develop a severe nervous system illness, such as encephalitis or meningitis.
In some cases, both illnesses have led to death. People of all ages can contract the illnesses, although older people and those with certain health conditions, like cancer and diabetes, are at a greater risk.
Per the CDC, one in 10 people who develop a severe illness die.
Blood and spinal fluid tests are required to diagnose West Nile.
Humans are considered dead-end hosts since they can’t transmit the virus to other mosquitoes. Although it is possible to pass West Nile to another human, the CDC said that it is rare. It spreads through blood transfusions, organ transplants, pregnancy and breastfeeding.
Preventing West Nile virus
The Davis County Mosquito Abatement District provided some tips for preventing West Nile.
Insect repellents that contain DEET, picaridin, IR3535, or lemon or eucalyptus oil are suitable to prevent mosquito bites.
(Getty Images)
Regardless of the repellant you choose, Davis County Mosquito Abatement District said to adhere to instructions printed on the product label.
In addition to bug repellent, long, loose, light colored clothing is also advised.
Mosquito Joe said that mosquitoes can bite through clothing, but wearing loose-fitting clothing can decrease the likelihood of a bite because there’s more room between the fabric and your skin.
Dusk to dawn is when mosquitoes are most active. Davis County Mosquito Abatement District recommends minimizing your time outdoors during those periods to reduce exposure.
Finally, empty containers that hold water, and check your home’s window and door screens for holes.
Related: West Nile virus found in Cache County mosquitoes
