Avoiding mosquito bites is the only method available to steer clear of West Nile virus
infection. Stay indoors especially at dawn and dusk when it's prime mosquito
feeding time. If you need to be outside between dusk and dawn, wear long pants and
a long-sleeved shirt. Also, you should use a mosquito repellent with a 30%-35% or less
solution of DEET to "Fight the Bite." Children between 2 months and 12 years can use repellents containing between 10-30% DEET (always follow product label directions). Do not put DEET on children's hands or feet.
Know The Enemy
The two most likely vectors (disease carriers) of West Nile virus in Utah are Culex tarsalis and Culex
pipiens.
Culex tarsalis
Culex tarsalis prefers biting birds in the spring and large mammals (including humans) as
the summer progresses, making it a particularly dangerous vector. The Culex tarsalis only
bites at dawn and dusk. The Mosquito Abatement District-Davis spends most
of its time battling these mosquitoes along the wetlands of the Great Salt Lake and other
large bodies of permanent and semi-permanent water. Since Culex tarsalis can fly several
miles, they are within range of homes within Davis County located far from the mosquitoes'
breeding sites. Correctly using a DEET-based repellent works in avoiding bites from this
as well as other types of mosquitoes living in Utah.
Culex pipiens
Combating Culex pipiens begins at your home. Commonly known as the house mosquito,
Culex pipiens breed in rain gutters, garbage cans, discarded tires, ornamental pools,
etc. This mosquito likes "yard junk" just as much as it likes yard decorations, and
sprinkler water as much as rain. It lives almost exclusively around houses,
preferring to sneak inside, buzz about, and bite at night. Remember, mosquitoes are
tirelessly persistent. If you have standing water somewhere on your property, Culex
pipiens will likely find it.
Preventing Mosquito Breeding Sites Near Your Home
Eliminate standing water:
Drill holes in or discard old tires
Cap hollow, open fence posts
Clear leaves and debris from rain gutters and downspouts
Clear grass clippings and gravel from street gutters
Drain water from yard decorations
Turn unused containers upside down. Wading pools, buckets, cans, barrels, scrap
metal, and "yard junk" are Culex pipiens' favorites.
Prevent standing water from becoming a breeding place:
Change birdbath water twice every week
Change trough water or contact Mosquito Abatement District-Davis for products
that can be used in potable water
Pour excess water from plant pots weekly
Examine these places after rain and watering
Ornamental ponds are a major source for the WNV carrying house mosquito, Culex
pipiens. Call Mosquito Abatement District-Davis at (801) 544-3736 and ask for
tiny, mosquito-larvae eating fish. (There is no additional cost for this
service to Davis County residents.)
Contact Information
Physical Address
22 South State St.
2nd Floor
Clearfield, Utah 84015 For a map, click here.
Mailing Address
Davis County Health Department
Attn: Communicable Disease & Epidemiology Division
P.O. Box 618
Farmington, Utah 84025