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When we think about outdoor dangers we usually think of falls, maybe a dog bite ... but very few of us think about the tiny little tick, other than as a nuisance. But tiny ticks, especially the deer tick, carry big diseases that can be spread to humans. One of the most dangerous of those diseases is Lyme disease.
Here at Cook Children's, our neurosciences team is very experienced in the care and treatment of Lyme disease, and especially the complications it can cause.
Lyme disease is caused by the bacterium Borrelia burgdorferi, which is found in small animals like mice and deer. Ixodes ticks (also called black-legged or deer ticks) that feed on these animals can then transmit Borrelia burgdorferi to people through tick bites.
Ticks are small and can be hard to see. Immature ticks, or nymphs, are about the size of a poppy seed; adult ticks are about the size of a sesame seed.
It's important to know and watch for symptoms of Lyme disease because ticks are hard to find and it's easy to overlook a tick bite – in fact, many people who get Lyme disease don't remember being bitten. The good news is that most tick bites don't result in Lyme disease.
You should know how to remove a tick just in case one lands on you or your child. First, don't panic. The risk of developing Lyme disease after being bitten by a tick is only about 1% to 3%. On top of that, it takes at least 24 to 48 hours for the tick to transmit the bacteria that cause Lyme disease. (To be safe, though, you'll want to remove the tick as soon as possible.) This is why a daily tick check is a good idea for people who live in high-risk areas.
If you find a tick:
One note of caution: Don't use "folk remedies" like petroleum jelly or a lit match to kill and remove a tick. These methods don't get the tick off skin and might just cause the insect to burrow deeper and release more saliva (which increases the chances of disease transmission).
Tick bites don't generally hurt – that's part of the difficulty in knowing whether someone has Lyme disease because pain usually helps to call attention to problems. So be on the lookout for ticks and rashes, and call your doctor if you're at all concerned.
Lyme disease affects people of all ages, across all ethnic and socioeconomic lines. While it is more common in certain parts of the U.S. and around the globe, it can be found worldwide, including your own backyard, literally. Lyme disease is not contagious, so it can't be transmitted from person to person. But people can get it more than once from ticks that live on deer, in the woods, or travel on pets. So continue to practice caution even if you or your child has already had Lyme disease.
There's no surefire way to avoid getting Lyme disease. But you can minimize your family's risk.
Be aware of ticks in high-risk areas like shady, moist ground cover or areas with tall grass, brush, shrubs, and low tree branches. Lawns and gardens may harbor ticks, too, especially at the edges of woods and forests and around old stone walls (areas where deer and mice, the primary hosts of the deer tick, thrive).
If you or your kids spend a lot of time outdoors, take precautions:
If you use an insect repellent containing DEET, always follow the recommendations on the product's label and don't over apply it. Place DEET on shirt collars and sleeves and pant cuffs, and only use it directly on exposed areas of skin. Be sure to wash it off when you go back indoors.
No vaccine for Lyme disease is currently on the market in the United States.
Lyme disease is a bacteria that caused by tick bites, especially the deer tick, but also European sheep ticks, fleas and body lice that carry the bacteria. Ticks can attach to any part of the human body but are often found in hard-to-see areas such as the groin, armpits, and scalp. In most cases, the tick must be attached for 36-48 hours or more before the Lyme disease bacterium can be transmitted.
Most humans are infected through the bites of immature ticks called nymphs. Nymphs are tiny (less than 2 mm) and difficult to see; they feed during the spring and summer months. Adult ticks can also transmit Lyme disease bacteria, but they are much larger and may be more likely to be discovered and removed before they have had time to transmit the bacteria. Adult Ixodes ticks are most active during the cooler months of the year.
Although dogs and cats can get Lyme disease, there is no evidence that they spread the disease directly to their owners. However, pets can bring infected ticks into your home or yard. Consider protecting your pet, and possibly yourself, through the use of tick control products for animals.
You will not get Lyme disease from eating venison or squirrel meat, but in keeping with general food safety principles meat should always be cooked thoroughly. Note that hunting and dressing deer or squirrels may bring you into close contact with infected ticks.
There is no credible evidence that Lyme disease can be transmitted through air, food, water, or from the bites of mosquitoes, flies, fleas, or lice.
Ticks not known to transmit Lyme disease include Lone star ticks (Amblyomma americanum), the American dog tick (Dermacentor variabilis), the Rocky Mountain wood tick (Dermacentor andersoni), and the brown dog tick (Rhipicephalus sanguineus).
Lyme disease can affect different body systems, such as the nervous system, joints, skin, and heart. Symptoms are often described as happening in three stages (although not everyone experiences all three):
The rash sometimes has a characteristic "bull's-eye" appearance, with a central red spot surrounded by clear skin that is ringed by an expanding red rash. It also can appear as an expanding ring of solid redness. It is usually flat and painless, but sometimes can be warm to the touch, itchy, scaly, burning or prickling. The rash may appear and feel very different from one person to the next, and it might be more difficult to see on people with darker skin tones, where it can look like a bruise. It expands over the course of days to weeks, and eventually disappears on its own. Along with the rash, a person may have flu-like symptoms such as fever, fatigue, headache, and muscle aches.
Having such a wide range of symptoms can make Lyme disease difficult for doctors to diagnose, although certain blood tests can be done to look for evidence of the body's reaction to Lyme disease.
If you think your child could be at risk for Lyme disease or has been bitten by a tick, call your doctor. Although other conditions can cause similar symptoms, it's always wise to contact your doctor, especially if your child develops a red-ringed rash, prolonged flu-like symptoms, joint pain or a swollen joint, or facial paralysis. That way your child can get further evaluation and treatment, if necessary, before the disease progresses too far.
Lyme disease is usually treated with a 2- to 4-week course of antibiotics. Cases that are diagnosed quickly and treated with antibiotics almost always have a good outcome. Your child should be feeling back to normal within several weeks after beginning treatment.
If your child has been diagnosed, you probably have lots of questions. We can help. If you would like to schedule an appointment, refer a patient or speak to our staff, please call our offices at 682-885-2500.