Why the tick-borne disease threat is changing in the UK

The changing threat from ticks and tick-borne diseases is becoming harder for UK veterinary teams to dismiss as a seasonal or purely travel-linked issue. Public health surveillance continues to show broad exposure risk for Lyme disease, with UKHSA reporting 1,581 laboratory-confirmed human Lyme disease cases in 2024 and noting that confirmed counts likely underestimate the true burden. Its National Tick Survey also says roughly 4% to 6% of tested ticks in England and Wales carry the bacteria that can cause Lyme disease. (gov.uk)

That backdrop helps explain why longstanding veterinary concern about canine tick-borne disease is gaining new urgency. In the UK, Ixodes ricinus remains the primary tick vector associated with Lyme disease, but the bigger strategic issue is that the risk picture is no longer limited to one pathogen or one tick species. ESCCAP UK & Ireland guidance continues to frame vector-borne disease control as an active biosecurity issue, and UKHSA’s recent mapping work says Ixodes ricinus remains the most common tick in the UK, while updated surveillance is being used to track changing distribution and local bite incidence. The wider literature also shows what high exposure can look like in practice: a recent survey of 53 people across 46 farms in southern Vermont found an average of three tick encounters over six months, with some reporting as many as 70, a reminder that repeated contact in outdoor working environments can be intense where tick habitat and host activity overlap. (researchportal.ukhsa.gov.uk)

Babesiosis is the clearest example of why veterinary teams are being pushed toward a broader index of suspicion. Official UK imported-disease guidance says an outbreak of Babesia canis was reported in untraveled dogs in Essex and that ongoing cases continue to be identified in dogs without any travel history. Earlier peer-reviewed work linked infected dogs, associated ticks, and field-collected ticks back to Harlow, Essex, supporting local transmission involving Dermacentor reticulatus. Separate research on the distribution of D. reticulatus found known UK regions in western Wales, north and south Devon, and Essex, and warned that spread into urban greenspace heightened the need for surveillance. (gov.uk)

The clinical literature also shows why this matters in practice. A 2023 Journal of Small Animal Practice study reviewing 76 dogs diagnosed with tick-borne diseases at seven UK referral institutions between 2005 and 2019 identified ehrlichiosis, babesiosis, Lyme borreliosis, anaplasmosis, and coinfections. Most dogs with ehrlichiosis and babesiosis had traveled to or from endemic countries, but not all: three ehrlichiosis cases, plus one Babesia canis case and one Babesia vulpes case, had no travel history. BSAVA said those findings suggest local transmission can occur and advised vets not to rule out tick-borne disease solely because a dog has stayed in the UK. (pubmed.ncbi.nlm.nih.gov)

Expert and industry commentary has been moving in the same direction for several years. Ian Wright, co-owner of Mount Veterinary Practice and head of ESCCAP UK & Ireland, has repeatedly warned through veterinary media that tick-borne disease is a growing UK risk, including the possibility that exotic ticks and pathogens could establish through pet travel and importation. BVA has also linked emerging disease risk to import controls, arguing that mandatory testing should be considered for diseases not currently endemic in the UK, including babesiosis and ehrlichiosis, when animals come from higher-risk countries. The occupational-health side of the evidence adds another useful layer to those warnings: in the Vermont farm survey, 12% of respondents said they had previously been diagnosed with a tick-borne disease, and one farmer reportedly developed Lyme carditis severe enough to require open-heart surgery. While that study was US-based and not directly transferable to UK prevalence, it illustrates how serious the consequences of repeated exposure can be for people living and working in tick-heavy environments. (vettimes.com)

Why it matters: For veterinary professionals, the practical takeaway is that prevention, history-taking, and diagnostics may need to become more nuanced. A dog with pyrexia, anemia, thrombocytopenia, lethargy, pigmenturia, shifting-leg lameness, or vague multisystem illness may warrant questions not just about recent travel, but also import status, kennel exposure, geography, tick attachment, and local walking habits. The public health angle matters, too: Lyme disease remains a shared human-animal concern, and surveillance in people can serve as a signal of broader environmental exposure. Evidence from heavily exposed outdoor-worker populations also supports more explicit client conversations about cumulative exposure risk, especially for owners involved in farming, field sports, forestry, or other regular tick-habitat activity. Inference: while the human and canine evidence streams are not directly interchangeable, the combined trend supports a more One Health-oriented approach to tick conversations in practice. (gov.uk)

There’s also a communication challenge. Preventive treatment decisions in the UK now sit alongside environmental concerns about ectoparasiticides in waterways, which means practices may increasingly need to justify product choice, seasonality, and risk-based use more clearly to pet parents. That doesn’t reduce the need for control, but it does make individualized recommendations, tick checks, and prompt tick removal more important parts of the conversation. (veterinary-practice.com)

What to watch: The next phase will likely center on whether surveillance shows expansion of established risk areas, whether additional non-travel canine cases are documented, and how UK regulators and professional bodies balance parasite prevention, import biosecurity, and environmental stewardship over the next 12 to 24 months. Expect, too, more attention to occupational and lifestyle exposure patterns as practices refine advice for clients whose dogs and households spend prolonged time in tick-prone settings. (gov.uk)