Lyme Disease

Lyme disease is caused by the bacterium Borrelia burgdorferi and is transmitted to humans through the bite of infected black-legged ticks. Typical symptoms include fever, headache, fatigue, and a characteristic skin rash called erythema migrans. If left untreated, infection can spread to joints, the heart, and the nervous system. Lyme disease is diagnosed based on symptoms, physical findings (e.g., rash); and the possibility of exposure to infected ticks.

But ready or not, ticks are out. Lyme disease is the most common tick-borne illness; but it’s not the only concern, says Dr Bobbi Pritt, a parasitic diseases expert at Mayo Clinic.

“There are other tick-borne diseases like anaplasmosis, babesiosis, Powassan virus and Borrelia miyamotoi infection; and those are just diseases transmitted by the black-legged tick; formerly known as the deer tick,” Pritt said. “We have other ticks that will transmit the disease-causing agents of ehrlichiosis. Now there are new viruses, such as Bourbon virus and Heartland virus. And there is also Rocky Mountain spotted fever.”

Transmit an infectious organism

Approximately 300,000 people each year are infected with Lyme disease due to a tick bite; according to the Centers for Disease Control and Prevention. “It’s the most common vector-borne disease in the Northern Hemisphere and in North America, in the U.S. specifically,” Pritt said.

“By vector-borne, we mean something that can transmit an infectious organism, be it a bacterium; a virus or a parasite, to a human. But Lyme disease is caused by Borrelia burgdorferi. It’s also caused by Borrelia mayonii, which we helped to identify here at Mayo Clinic.”

Here are some tips to protect yourself from ticks and mosquitoes:

  1. When possible, avoid areas where ticks and mosquitoes are more frequently found.
  2. Use repellent with 30% or more of DEET.
  3. Wear clothing that covers your arms and legs.
  4. Tuck pants into socks while hiking.

If bitten by a tick, you should:

  1. Remove the tick promptly and carefully. Use fine-tipped forceps or tweezers to grasp the tick as close to your skin as possible. Gently pull out the tick using a slow and steady upward motion. Avoid twisting or squeezing the tick. Don’t handle the tick with bare hands. But experts don’t recommend using petroleum jelly, fingernail polish or a hot match to remove a tick.
  2. If possible, seal the tick in a container. But put the container in a freezer. Your health care provider may want to see the tick if you develop new symptoms.
  3. Wash your hands and the bite site. Use warm water and soap, rubbing alcohol, or an iodine scrub.

Before You Go Outdoors

Ticks live in grassy, brushy, or wooded areas, or even on animals. Spending time outside walking your dog, camping, gardening, or hunting could bring you in close contact with ticks. Many people get ticks in their own yard or neighborhood.

Treat clothing and gear with products containing 0.5% permethrin. Permethrin can be used to treat boots, clothing and camping gear and remain protective through several washings. Alternatively, you can buy permethrin-treated clothing and gear.