Why the UK’s tick threat is becoming harder to predict

CURRENT BRIEF VERSION: Ticks are becoming a less predictable, more year-round threat in the UK, and the disease picture is broadening beyond Lyme disease. Recent UK surveillance and veterinary commentary point to longer tick activity seasons, ongoing Lyme risk from Borrelia burgdorferi, and continued concern about canine babesiosis caused by Babesia canis, including UK cases in dogs with no travel history. ESCCAP UK’s 2025 parasite forecast says SAVSNET data showed a prolonged tick activity peak from early spring to late autumn in 2024, while UKHSA says the rise in laboratory-confirmed Lyme disease cases in England and Wales likely reflects a mix of better awareness and testing, changing human and wildlife behavior, and shifts in tick distribution and activity periods. A separate U.S. study in farmers and outdoor workers is not UK-specific, but it underlines the occupational exposure side of the issue: participants reported an average of three tick encounters over six months, some reported as many as 70, and 12% said they had previously been diagnosed with a tick-borne disease. (esccapuk.org.uk)

Why it matters: For veterinary professionals, this is less about a single emerging pathogen than a changing risk environment. Dogs can act as sentinels for tick exposure shared with pet parents, and the clinical differential may need to stay wider for longer through the year. That includes Lyme disease, but also babesiosis in the right geographic or clinical context, especially because APHA and GOV.UK guidance note that Babesia canis has been reported in untraveled dogs in the UK, and BSAVA has highlighted non-endemic tick-borne infections in UK dogs, including presumed locally acquired cases. The practical implication is a stronger case for individualized, year-round tick prevention, travel histories that include UK hotspots as well as overseas movement, and low thresholds for diagnostics such as blood smear review or PCR when compatible signs appear. The farmer data also reinforce a useful clinic message for rural and outdoor clients: repeated tick exposure can be substantial, especially during seasonal tasks, so prevention advice should cover both pets and the people handling them. (gov.uk)

What to watch: Expect more emphasis on surveillance, seasonal risk messaging, and targeted prevention as UK data clarify where tick activity is extending and where pathogens such as Babesia canis may be establishing. For practices serving farm or outdoor-working clients, watch too for more discussion of occupational exposure and One Health messaging around tick checks, repellents, and habitat-related risk. (esccapuk.org.uk)