Can Cats Get Lyme Disease? What the Evidence Means for Owners
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By Dr Duncan Houston
Finding a tick on your cat is a reason to act, but it is not a diagnosis of Lyme disease. Cats can be exposed to the bacteria that cause Lyme disease, while the evidence linking natural infection to illness in cats is much less established than it is in dogs or people.
Quick Answer
Cats can become infected with Borrelia bacteria and develop antibodies after exposure to infected ticks. However, naturally occurring clinical Lyme disease in cats remains poorly understood, with limited evidence and rare suspected reports. An unwell cat needs assessment for a range of causes, alongside prompt tick removal and prevention appropriate for cats.
Exposure is different from proven disease
An antibody result can indicate that the immune system has encountered an organism. It does not automatically show that the organism caused a cat's current symptoms. The ACVIM consensus emphasises this uncertainty in cats, including the difficulty of separating Lyme exposure from other infections carried by similar ticks.
Rare published reports have described suspected Lyme-associated illness, including heart rhythm abnormalities, but individual reports cannot establish a typical feline disease pattern. It would be misleading to present a standard list of kidney, nerve or joint complications as though they are well-established feline outcomes. Equally, uncertainty about Lyme disease should not lead to dismissing a sick cat.
Where your cat has been matters
Risk of exposure depends on geography, suitable tick vectors and outdoor access. Lyme bacteria occur in recognised regions overseas, including parts of North America and Europe. Tell your veterinarian about travel or importation and where your cat may have encountered ticks.
Current Australian public health guidance reports no evidence that Australian ticks cause Lyme disease. Australian cats still need protection from ticks, particularly paralysis ticks in relevant regions. Local tick hazards should guide the prevention plan rather than assuming all tick-associated illness is Lyme disease.
What to do after finding a tick
- Assess your cat's condition. Breathing changes, weakness, collapse or difficulty walking require urgent veterinary care.
- Arrange prompt removal. Use a suitable tick-removal tool as instructed, or ask your clinic to remove the tick if you are unsure or your cat resists handling.
- Record the exposure. Note the date, location and any recent travel. A clear photograph or securely contained tick may help identification if the clinic requests it.
- Check prevention. Confirm that the product used covers the relevant ticks and is labelled for cats of your cat's age and weight.
Do not burn a tick, apply essential oils or delay care while trying several home remedies. Removal does not eliminate the need to assess symptoms, particularly where tick paralysis is possible.
If your cat is unwell
| Sign | Examples of other explanations | Recommended response |
|---|---|---|
| Limping or reluctance to jump | Injury, arthritis, a bite wound or joint inflammation | Arrange an examination; seek urgent care for severe pain or sudden inability to use a limb |
| Fever, hiding or poor appetite | Infection, inflammation, pain and many systemic illnesses | Contact your veterinarian promptly, especially if eating stops |
| Weakness or an altered voice after tick exposure | Tick paralysis or other neurological illness | Seek urgent assessment |
| Laboured or open-mouth breathing, or collapse | A serious respiratory, cardiac or systemic problem | Go to emergency care immediately |
Testing is chosen after the history and examination. Blood tests, imaging or tests for other infections may be more informative than a Lyme test alone. A positive antibody result needs careful interpretation in a cat; it should not end the investigation prematurely.
Treatment is based on the individual findings
There is no well-established routine feline Lyme treatment pathway that owners should start themselves. If a veterinarian suspects a bacterial infection, they will choose medication, duration and monitoring based on the whole case. Do not use leftover antibiotics or follow a canine dose. Treatment response alone may not identify which disease was present.
Prevent ticks without creating another hazard
Use only a product specifically appropriate for cats, following the label and veterinary advice. Some dog flea and tick products are dangerous to cats; do not divide a dog dose or assume a smaller amount is safe. Follow separation instructions when another household pet has received a topical product. Contact a veterinarian immediately after accidental exposure to an unsuitable product.
Check your cat after outdoor access, maintain a manageable garden and consider a secure enclosure to limit roaming. There is no routine Lyme vaccine for cats, so a canine vaccine is not an alternative to safe tick control.
Frequently Asked Questions
Does a positive Lyme test prove my cat has Lyme disease?
No. Exposure and illness are different questions. The result must be considered with the symptoms, geography and other investigations.
Should every tick bite be treated with antibiotics?
No. Ask your veterinarian what monitoring or tests are appropriate. Unnecessary antibiotics can cause harm and distract from the actual problem.
Do indoor cats need a prevention discussion?
Yes. Exposure can occur through escapes, other pets or local conditions. Your veterinarian can assess the realistic risk and suitable protection.
Sources and Further Reading
- ACVIM: Consensus on Lyme borreliosis in dogs and cats
- Journal of Feline Medicine and Surgery Open Reports: Two suspected feline Lyme carditis cases
- Cornell: Feline Lyme exposure and tick protection
- US EPA: Safe flea and tick product use
- NSW Health: Lyme disease and Australian context
Safe tick prevention and timely assessment are useful even where the Lyme evidence is uncertain. Focus on how your cat is feeling and give your veterinarian the full exposure history.
ASK A VET™ can help you understand tick risks and prepare questions about test results. Weakness, breathing difficulty or collapse needs immediate in-person veterinary care.
