Public health officials across Canada are urging residents to adopt rigorous preventative measures as tick activity peaks during the summer months, increasing the risk of Lyme disease transmission. According to the Public Health Agency of Canada, the blacklegged tick—the primary vector for the bacteria Borrelia burgdorferi—is now established in several regions across Ontario, British Columbia, Manitoba, Quebec, and the Maritimes.
How to identify and avoid tick habitats
Ticks thrive in humid, shaded environments, particularly in tall grasses, shrubs, and leaf litter. Because they cannot jump or fly, they wait on the tips of vegetation for a host to brush past. To minimize exposure, the Government of Ontario recommends walking in the center of cleared trails and avoiding tall grass or dense brush.
When venturing into high-risk areas, wearing light-colored, long-sleeved clothing makes it easier to spot ticks before they attach to the skin. Applying an insect repellent containing DEET or icaridin, as approved by Health Canada, provides an additional layer of protection against bites.
Why performing a tick check is critical
Early detection is the most effective way to prevent Lyme disease. If a tick is removed within 24 to 36 hours of attachment, the risk of transmitting the bacteria is significantly reduced, according to the Centers for Disease Control and Prevention (CDC).
After returning from outdoor activities, conduct a full-body scan. Ticks often migrate to warm, hidden areas of the body, including:
- The scalp and behind the ears
- Under the arms
- Inside the belly button
- The groin area and behind the knees
If you find a tick, use fine-tipped tweezers to grasp it as close to the skin as possible and pull upward with steady, even pressure. Do not twist or crush the tick, as this can force bacteria into the bloodstream.
What are the symptoms of Lyme disease?
Lyme disease manifests differently in every patient, but early symptoms typically appear three to 30 days after a bite. The most recognizable sign is the erythema migrans rash, often described as a "bullseye" pattern, which occurs in approximately 70% to 80% of infected individuals, per the Mayo Clinic.
Other early symptoms include:
- Fever and chills
- Fatigue and body aches
- Headaches and stiff neck
- Swollen lymph nodes
If you develop these symptoms after spending time in a known tick-endemic area, consult a healthcare provider immediately. Early intervention with antibiotics is highly effective at preventing the long-term complications associated with untreated Lyme disease, such as neurological issues or chronic joint inflammation.
Seasonal risk trends
While tick activity is highest in the spring and summer, the risk persists well into the autumn months until the first deep frost. Public health units, including those in the Waterloo Region, emphasize that as climate patterns shift, tick populations are expanding their geographical range. Residents should treat tick safety as a standard part of their summer health routine, regardless of whether they live in a previously "low-risk" area.