UK tick threats shift as Lyme and babesiosis risks evolve
CURRENT BRIEF VERSION: Ticks are becoming a more complex, year-round threat for UK pets, and not just because of Lyme disease. Recent UK surveillance and veterinary commentary point to a shifting landscape: Ixodes ricinus remains the country’s dominant tick and the main vector for Lyme disease, but tick distribution maps are being updated, local bite-risk heat maps are now in use, and concern is growing around other pathogens, including Babesia canis, carried by Dermacentor reticulatus. UKHSA said England recorded 1,581 laboratory-confirmed Lyme disease cases in 2024, while noting that confirmed cases still underestimate the true burden. Separate UKHSA research found Borrelia burgdorferi s.l. in 5.8% of I. ricinus nymphs sampled at recreational sites in England and Wales from 2021 to 2023, with some sites much higher. Meanwhile, veterinary parasitology experts writing in the UK trade press say canine exposure risk is being shaped by climate, habitat change, pet movement, and the spread or persistence of non-native and locally established tick species. Broader occupational research also underscores how intense tick exposure can become in outdoor settings: in a 2025 Binghamton University report from farms in southern Vermont, participants reported an average of three tick encounters over six months, but some reported as many as 70, and 12% said they had been diagnosed with a tick-borne disease. (gov.uk)
Why it matters: For veterinary teams, the story is less about a single outbreak and more about a surveillance and prevention challenge that’s broadening. Babesiosis remains comparatively focal in the UK, but it’s no longer purely a travel-associated concern: the Essex outbreak in untraveled dogs in 2015-2016 remains the clearest warning, and newer commentary suggests risk may now exist in additional pockets, including a positive B. canis finding in the south-west of England. APHA guidance already treats Babesia canis as a veterinary and pet parent concern, and recent VMD-approved ectoparasiticides have added label claims around reducing transmission risk from infected D. reticulatus ticks, reflecting how seriously manufacturers and regulators now view vector-borne disease prevention. The wider point, echoed by farm-worker research showing how repeated tick exposure can disrupt health and work, is that heavy environmental exposure can have real consequences even when national prevalence looks low. For practices, that means sharper conversations about geography, travel, seasonality, diagnostics, and consistent tick control, especially for dogs with outdoor exposure. (gov.uk)
What to watch: Expect closer attention to UK tick surveillance, localized canine babesiosis risk, and whether changing climate, habitat, and pet travel continue to push tick-borne disease from a seasonal issue toward a routine part of preventive care. (researchportal.ukhsa.gov.uk)