Singer Justin Timberlake is the latest celebrity to announce he’s been battling Lyme disease, but experts say cases of the tick-borne illness are on the rise in Canada, too, largely because warmer summers have extended tick season.

Ontario

Lyme disease, a bacterial infection transmitted by ticks, is on the rise in Canada. The number of reported cases has grown from just over 500 to more than 5,000 in the past decade. Experts attribute this increase to climate change, which is causing warmer temperatures and longer summers, allowing ticks to spread to previously unaffected areas and remain active for longer periods.

Early symptoms of Lyme disease often include a bullseye-shaped rash, fever, chills, and joint pain. If left untreated, the disease can progress to severe neurological and muscular complications. Most cases can be effectively treated with antibiotics if caught early. Health officials advise people to protect themselves by wearing long clothing, using insect repellent containing DEET, and performing regular tick checks.

Lyme disease more common as warmer summers bring more ticks

As his world tour came to an end amid criticism from some about lacklustre low-energy performances singer Justin Timberlake revealed he'd been diagnosed with Lyme disease. Living with this can be relentlessly debilitating, he wrote on Instagram adding he was shocked by the diagnosis but at least I could understand why I would be on stage and in a massive amount of nerve pain or just feeling crazy fatigue or sickness. He's the latest celebrity to speak out about Lyme disease caused by a bacteria carried by some ticks. Canadian singers Shania Twain and Avril Lavigne have also spoken about their past struggles. I was in Los Angeles and it was like literally like the worst time of my life. It needs to be caught and treated early. This infectious disease specialist says Lyme disease appears in three phases usually starting with a rash that often looks like a bullseye. It can lead to fever, chills and joint pain and can progress sometimes over months if untreated. Stage three, that's when you really have some pretty dangerous neurological involvement or you can also have involvement of your muscles and joints. In Canada, Lyme disease cases have been climbing over the past decade. There were just over 500 in 2014. In 2024, there were more than 5,000 according to preliminary estimates. Experts say climate change is one factor bringing ticks to regions once too cold for them. Rising temperatures and longer summers, they extend the tick season and they keep them active and that means biting for more time of the year. This specialist says most cases can be treated early on with antibiotics. The faster we treat them, the easier it is for the patient and the less side effects and residual symptoms they have. With ticks spreading to more parts of the country, experts say people need to protect themselves with long clothing, bug spray with deed and frequent tick checks. Alison Northcott, CBC News, Montreal.

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