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The incidence of Lyme disease continues to rise in Quebec, with the Institut national de santé publique du Québec (INSPQ) expanding its list of endemic municipalities to 685 this year. Driven by climate change, including milder winters and warmer temperatures, black-legged tick populations are establishing themselves in new regions, increasing the risk of human and animal exposure across the southern parts of the province.
The Expansion of Lyme Disease in Quebec
According to the INSPQ, the geographical distribution of these ticks has shifted significantly over the past decade.
Caren Leblanc, director general of the Association québécoise de la maladie de Lyme, notes that longer, warmer seasons directly facilitate the survival and reproductive success of tick populations.
Clinical Presentation and Patient Experience
Common initial signs include a "bull’s-eye" rash known as erythema migrans, which appears in many, though not all, cases. Systemic symptoms often mimic influenza, including fatigue, dizziness, and intense headaches.
However, as reported in individual accounts, some patients experience lingering symptoms or complications if the infection is not addressed promptly.
Protecting Pets and Managing Risks
Domestic animals, particularly dogs, are frequently exposed to ticks during outdoor activities. While the clinical severity of Lyme disease can differ between humans and canines, the risk remains a concern for pet owners.
Unlike in human medicine, where no vaccine is currently available for Lyme disease, veterinary vaccines exist to help protect dogs from the infection. Owners are encouraged to:
Prevention and Surveillance
As tick populations continue to establish, tracking the expansion of these vectors remains a priority for the INSPQ.
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