Lyme Disease

Be on the lookout for ticks!

The deer tick or black-legged tick (Ixodes scapularis) can transmit Lyme disease and anaplasmosis. Since ticks are increasingly common in Québec, it's important to take certain necessary precautions.

When taking part in outdoor activities from April to November:

  • Use a mosquito repellent that contains DEET or icaridin.
  • Wear long clothing and cover your body as fully as possible. 
  • Walk along cleared trails and avoid rubbing up against any vegetation.
  • When coming in after the activity, take a shower. Then check your body for ticks and remove any you find.

Lyme Disease

Common Symptoms

The most common symptom is a rash around the tick bite that is present in 60% to 80% of infections. The rash expands daily, generally reaching 5 cm in diameter. Other symptoms may be associated with this disease, including: fever, fatigue, headache, stiff neck, muscle pain or joint paint.


Common Symptoms

  • Fever and chills
  • Fatigue
  • Headache
  • muscle pain
  • Nausea, vomiting, diarrhea or loss of appetite (about 20% of cases)
  • In rare cases, a rash (less than 10% of cases)

Most people experience mild to moderate symptoms, but those who are immunosuppressed, aged 50 and older or who delay consulting after the onset of the first symptoms may present with more severe cases.


Unlike Lyme Disease, there is no preventive treatment for anaplasmosis after a tick bite. Even if the tick has been removed within a 24-hour window, you may still develop anaplasmosis. It is therefore essential to apply preventive measures before going to the great outdoors in order not to get bitten by a tick.

Have you been bitten by a tick?

Were you bitten by a tick in Haute-Yamaska, Brome-Missisquoi, Val-Saint-François or near Val-des-Sources?

  • Remove the tick with a fine tweezers, such as an eyebrow tweezers.
  • Call Info-santé at 811: preventive treatment might be recommended.
  • Put the tick in a container (e.g., a pill bottle). Write down the date and location where you were bitten. This information could be useful if you consult a doctor.
  • See your doctor or go to a walk-in medical clinic if Lyme-disease or Anaplasmosis symptoms appear from 3 to 30 days after you were bitten.

Were you bitten by a tick somewhere else in Estrie?

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