Why the UK’s tick-borne disease threat is shifting

CURRENT BRIEF VERSION: Tick risk in the UK is no longer a static spring-and-summer story. Recent UK surveillance and veterinary guidance point to a shifting landscape in which Ixodes ricinus remains the country’s dominant tick species and key Lyme disease vector, while localized pockets of other medically important ticks, including Dermacentor reticulatus, continue to raise concern for canine babesiosis. UKHSA’s latest Tick Surveillance Scheme analysis, published in January 2026, logged 3,182 tick records and 27 species from 2021 to 2024, alongside updated distribution maps and a new local tick-bite incidence heat map for England and Wales. At the same time, UKHSA says roughly 4% of ticks in England and Wales are infected with Lyme-causing Borrelia on average, with some areas reaching 8% to 10%, and England recorded 281 laboratory-confirmed Lyme disease cases in Q2 2024, up from 253 in the same quarter a year earlier. Meanwhile, veterinary sources continue to flag Essex as an endemic focus for Babesia canis linked to D. reticulatus, reinforcing that autochthonous canine babesiosis is no longer just an imported-disease concern. Human occupational data from outside the UK also underline how intense exposure can become in high-risk outdoor settings: a Vermont farmworker survey found an average of three tick encounters over six months, with some workers reporting as many as 70, and 12% saying they had previously been diagnosed with a tick-borne disease. (researchportal.ukhsa.gov.uk)

Why it matters: For veterinary professionals, the practical change is that tick-borne disease risk is becoming more geographically dynamic, more relevant year-round, and more important to discuss as a One Health issue with pet parents. ESCCAP UK & Ireland notes that ticks in the UK can transmit a broad range of pathogens, including Borrelia burgdorferi sensu lato, Babesia spp., Anaplasma phagocytophilum, and others, while APHA has separately warned that the geographic distribution of tick-borne infections is likely to keep evolving with climatic and land-use changes. The experience of heavily exposed outdoor workers also helps illustrate how repeated tick contact can affect people sharing the same environments as pets. That means clinics may need a lower threshold for asking about travel and habitat exposure, checking for ticks during routine exams, and considering babesiosis or other vector-borne disease differentials even when a dog hasn’t left the UK. (esccapuk.org.uk)

What to watch: Watch for further expansion of local surveillance, updated risk maps, and whether endemic canine babesiosis remains confined to known hotspots or begins appearing more often outside them. (researchportal.ukhsa.gov.uk)