Introduction
Lyme disease has become an increasingly important concern for dog owners across Ontario, including Brampton and surrounding areas.
As tick populations continue to grow, more dogs are being exposed to tick-borne diseases each year. Many infected dogs show no obvious symptoms early on, making prevention and testing extremely important.
What is Lyme Disease?
Lyme disease is caused by the bacterium Borrelia burgdorferi and is transmitted primarily through the bite of infected blacklegged ticks.
The Blacklegged Tick: The Most Important Tick in Ontario
The blacklegged tick (Ixodes scapularis) is the primary carrier of Lyme disease in Ontario.
Ticks are commonly found in:
- Tall grass
- Wooded areas
- Trails and parks
- Leaf litter and brush
Symptoms of Lyme Disease in Dogs
- Lameness or limping
- Joint swelling
- Fever
- Lethargy
- Reduced appetite
- Stiffness or pain
Why Annual Testing is Important
Annual testing is recommended even for dogs receiving tick prevention medication.
- No prevention is 100% perfect
- Many infected dogs show no early symptoms
- Dogs may be exposed to multiple tick-borne diseases
- Early detection improves management
- Testing confirms prevention is working
Tick Prevention: The Foundation of Protection
Tick prevention helps reduce the risk of disease transmission and protects dogs throughout tick season.
Lyme Vaccination: An Additional Layer of Protection
For dogs at risk of tick exposure, Lyme vaccination may provide an additional layer of protection.
Vaccination should always be combined with tick prevention and annual testing for the best protection.
Book Your Pet’s Preventive Care
Call McQueen Animal Hospital at 905-455-7387 to discuss Lyme testing, prevention, and vaccination for your dog.
FAQs’
Can dogs get Lyme disease in Ontario?
Yes. Lyme disease is increasingly common in Ontario due to expanding tick populations.
Does my dog still need testing if on prevention?
Yes. Annual testing confirms protection and helps detect infection early.
Does Lyme vaccination replace prevention?
No. Vaccination should be combined with prevention and testing.

