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Some mosquitoes are harmful and can spread viruses like West Nile, dengue, Zika, and parasites like malaria. Other mosquitoes bother people and are considered “nuisance” mosquitoes. Nuisance mosquitoes bite people, but don’t spread germs. Of the over 200 types of mosquitoes in the United States and US territories, about 12 types spread germs.
Local government departments and mosquito control professionals track the numbers and types of mosquitoes in an area and the germs they may be spreading. When infected adult mosquitoes are spreading germs to people, acting quickly can stop further spread and prevent people from getting sick. Professionals share prevention information with the public and use multiple methods at the same time to kill mosquito larvae and adult mosquitoes.
Apply EPA-registered insect repellent
Use Environmental Protection Agency (EPA)-registered insect repellents with one of the active ingredients listed below. When used as directed, EPA-registered insect repellents are proven safe and effective, even for people who are pregnant or breastfeeding.
Wear loose-fitting long clothing
Covering your skin with long-sleeved shirts and long pants can stop mosquitoes and ticks from biting.
Treat clothes with permethrin
Use 0.5 % permethrin to treat clothing and gear (such as boots, pants, socks, and tents) or buy permethrin-treated clothing and gear. It will remain protective through several washings. Permethrin is an insecticide that kills and repels mosquitoes and ticks. If treating items yourself, follow the product instructions. Do not use permethrin products directly on skin. To learn more, watch the video, What You Need to Know About Permethrin.
Know where to expect ticks
Ticks live in grassy, brushy, or wooded areas. Avoid wooded and brushy areas with high grass and leaf litter. Walk in the center of trails to prevent contact with ticks.
Prevent ticks on dogs
Dogs are very susceptible to tick bites and tickborne diseases. Vaccines are not available for most tickborne diseases that dogs can get, and vaccines don’t keep dogs from bringing ticks into your home.
Talk to your veterinarian about:
To further reduce the chance your dog gets sick from a tick bite:
Signs of tickborne disease may not appear for 7 to 21 days or longer after a tick bite. Watch your dog closely for changes in behavior or appetite if you suspect your pet has been bitten by a tick.
Note: Cats are extremely sensitive to a variety of chemicals. Do not apply any tick prevention products to your cats without first asking your veterinarian.
Check for ticks
Check your body for ticks after being outdoors. Conduct a full body tick check upon return from potentially tick-infested areas, including your own backyard. Use a hand-held or full-length mirror to view all parts of your body.
Check theses parts of your body and your child’s body for ticks:
If you find an attached tick, remove it as soon as possible. Dispose of a live tick by doing one of the following:
Take a shower
Showering within two hours of coming indoors has been shown to reduce your risk of getting Lyme disease and can be effective in reducing the risk of other tickborne diseases. Showering can help wash off unattached ticks. Showering is a good opportunity to do a tick check.
Tumble dry clothes
Ticks can be carried into the house on clothing. Any ticks found should be removed. Tumble dry clothes in a dryer on high heat for 10 minutes to kill ticks on dry clothing after you come indoors. If clothes are damp, additional time may be needed. If the clothes require washing first, hot water is recommended. Cold and medium temperature water will not kill ticks.
Use air conditioners and screens
To keep mosquitoes outside of your home, you can:
Empty standing water
Mosquitoes lay eggs in or near water. By dumping out standing water, you can prevent eggs from developing into adult mosquitoes.
Once a week, empty and scrub, turn over, cover, or throw out any items that hold water like tires, buckets, planters, toys, pools, birdbaths, flowerpot saucers, or trash containers. Tightly cover water storage containers so mosquitoes cannot get inside. For containers without lids, use wire mesh with holes smaller than an adult mosquito.
When a mosquito bites you, it pierces the skin using a special mouthpart (proboscis) to suck up blood. As the mosquito is feeding, it injects saliva into your skin. Your body reacts to the saliva resulting in a bump and itching.
Some people have only a mild reaction to a bite or bites. Other people react more strongly, and a large area of swelling, soreness, and redness can occur.
Mosquito bite signs include:
More severe reactions can occur in:
People experiencing more severe reactions may have the following signs: