A Single Tick Bite Can Change Everything
In the UK, Lyme disease is the most commonly reported tick-borne illness in both humans and dogs. Estimates suggest that in some high-risk areas, up to 5% of ticks carry the Borrelia burgdorferi bacterium responsible for the disease. For dog owners who walk woodland trails or grassy moorland, that is not a negligible risk — it is a genuine and growing concern.
How Ticks Transmit Lyme Disease
Lyme disease is caused by the spiral-shaped bacterium Borrelia burgdorferi, transmitted through the bite of infected Ixodes ricinus ticks — the sheep tick most commonly found in the UK. Transmission does not happen instantly. A tick typically needs to be attached for 24 to 48 hours before the bacterium passes into the host's bloodstream, which is why prompt tick removal remains one of the most effective preventive measures available.
Ticks are most active from March through October, with peak activity in spring and early autumn. They do not jump or fly; instead, they quest — holding onto vegetation with their back legs and reaching outward with their front legs until a host brushes past.
UK Risk Areas: Where to Be Most Vigilant
While ticks exist throughout the UK, certain regions carry a substantially higher risk. The following areas have consistently recorded elevated tick populations and confirmed Lyme disease cases:
- The Scottish Highlands and Islands, particularly around Loch Lomond and Cairngorms National Park
- The New Forest in Hampshire
- Exmoor and Dartmoor in the South West
- The Lake District in Cumbria
- The South Downs and Thetford Forest
- Parts of Wales, including Snowdonia
Urban parks with deer populations are also increasingly flagged as lower-level risk zones. The idea that Lyme disease is purely a rural problem no longer holds.
Recognising Symptoms in Your Dog
Dogs are often described as silent carriers of Lyme disease because many show no obvious signs. When symptoms do appear, they typically emerge two to five months after infection, which makes connecting the illness to a tick bite genuinely difficult.
Common Clinical Signs
- Shifting, intermittent lameness that moves between limbs
- Swollen joints and reluctance to bear weight
- Fever, lethargy, and reduced appetite
- Enlarged lymph nodes
- General stiffness or sensitivity to touch
Serious Complications
A small proportion of infected dogs develop Lyme nephritis — a severe kidney complication that can progress rapidly and is often fatal. Labrador Retrievers and Golden Retrievers appear to be disproportionately affected. Signs include vomiting, weight loss, excessive thirst and urination, and fluid accumulation. This is a veterinary emergency.
Testing and Diagnosis
Diagnosis is based on a combination of clinical history, known tick exposure, and blood testing. Your vet may use an in-clinic rapid antibody test (such as the C6 peptide ELISA) to detect exposure to Borrelia. A positive result confirms exposure but not necessarily active disease, since many dogs mount an immune response without becoming ill.
More comprehensive panels — including the Quantitative C6 test — can help distinguish between exposure and active infection and are used to monitor response to antibiotic treatment over time. Urine protein testing is recommended in confirmed cases to assess kidney function.
Treatment and Prevention
When Lyme disease is caught early, it typically responds well to antibiotic treatment, most commonly doxycycline, administered over four weeks. Improvement is usually seen within days, though some dogs experience recurring lameness. Always complete the full course as prescribed by your vet.
Practical Prevention Steps
- Use a veterinary-approved tick preventative — available as spot-ons, collars, or oral tablets
- Check your dog thoroughly after every outdoor walk, paying attention to ears, between toes, and around the collar
- Remove any attached ticks promptly using a tick hook or fine-tipped tweezers, twisting gently without squeezing the body
- A Lyme disease vaccine is available in the UK — discuss suitability with your vet, particularly if you walk regularly in high-risk areas
- Keep a record of tick exposure so your vet can factor it into any future diagnosis
What to Do If You Find a Tick
Remove the tick as soon as possible. Use a proprietary tick remover or fine-pointed tweezers. Grasp the tick close to the skin, twist gently, and pull upward with steady pressure. Do not apply petroleum jelly, nail varnish, or heat — these methods can cause the tick to regurgitate, increasing infection risk. After removal, clean the bite site with antiseptic. Monitor your dog over the following weeks and consult your vet if any of the symptoms above develop.
Lyme disease is a manageable condition when caught early. The key is awareness, consistent preventative care, and a prompt conversation with your vet if you suspect exposure. Given the expanding range of tick populations in the UK, that conversation is worth having sooner rather than later.