Why the UK tick-borne disease threat is changing for dogs

The threat from ticks and tick-borne diseases in the UK is changing from a largely seasonal, location-specific concern into a broader surveillance and clinical challenge. Lyme disease remains the best-known endemic risk, but babesiosis has become part of the conversation for dogs that have never left the country, underscoring how vector distribution, pathogen establishment, and pet movement are reshaping veterinary risk assessments. (vettimes.com)

That shift has been building for years. A veterinary review published by Vet Times, written by Mount Veterinary Practice co-owner Richard Wall and ESCCAP UK & Ireland chair Ian Wright, described Lyme disease caused by Borrelia burgdorferi as the most common tick-borne pathogen of veterinary significance to UK dogs, while also warning that the threat landscape was evolving. A companion article on babesiosis described Babesia canis as an emerging threat, especially after cases in untravelled dogs in Harlow, Essex, pointed to local transmission rather than importation alone. (vettimes.com)

Subsequent government and surveillance material supports that trajectory. Defra’s imported disease summary for dogs and cats says ongoing cases of babesiosis continue to be found in dogs without travel history, following the original Essex outbreak. UKHSA’s Tick Surveillance Scheme and associated mapping work show that Ixodes ricinus remains the most commonly reported UK tick and the primary vector for Lyme disease and tick-borne encephalitis, while enhanced tick surveys also monitor species linked to veterinary pathogens, including Dermacentor reticulatus. (gov.uk)

The public health backdrop matters here, too. UKHSA reported 1,581 laboratory-confirmed Lyme disease cases in England in 2024, with seasonal peaks aligning with spring and summer tick exposure. Government climate and health guidance also notes that tick distribution and disease risk may change with climate, land use, host availability, and travel patterns. That doesn’t automatically translate into uniform risk across the UK, but it does support the broader veterinary message that historical assumptions about where ticks matter most may age quickly. (gov.uk)

There’s also a wider One Health lesson in newer research beyond companion animals. A 2026 Journal of Agromedicine study led by Amanda Roome at Binghamton University found that farmers and farmworkers in southern Vermont reported an average of three tick encounters over six months, with some reporting as many as 70, and 12% saying they had been diagnosed with a tick-borne disease. While that study is US-based, not UK-specific, it reflects the same broader pattern seen in UK surveillance: tick exposure is increasingly an occupational, environmental, and animal health issue at the same time. (pubmed.ncbi.nlm.nih.gov)

Why it matters: For veterinary teams, the practical takeaway is that tick conversations need to be more tailored, more local, and more proactive. Dogs presenting with pyrexia, anaemia, lethargy, thrombocytopenia, or shifting lameness may warrant a different differential list than they did a decade ago, especially if they live in or have visited known tick areas. Preventive advice for pet parents should account for travel, habitat exposure, seasonality, and the fact that some clinically important infections, including babesiosis, may now be acquired domestically in defined UK areas. ESCCAP’s 2024 vector-borne disease guideline reinforces that tick-borne pathogens, including Babesia and Borrelia, remain central to parasite control planning. (vettimes.com)

Expert and industry commentary has largely converged around surveillance and prevention rather than alarm. UKHSA continues to encourage tick submission and local monitoring, and BSAVA has highlighted evidence that some non-endemic tick-borne diseases have already been identified in UK dogs without travel history. Taken together, that suggests the profession should think less in terms of “imported versus endemic” as a strict divide, and more in terms of changing exposure pathways and uneven but real local establishment. That last point is an inference from the surveillance and case data, rather than a direct quote, but it is consistent with the direction of the evidence. (gov.uk)

What to watch: The next signals to watch are updated Tick Surveillance Scheme maps, any new UKHSA or Defra alerts on unusual tick species or locally acquired canine cases, and whether veterinary guidance evolves further as climate, wildlife ecology, and pet movement continue to influence where tick-borne disease risk shows up in practice. (researchportal.ukhsa.gov.uk)