TL;DR: What You Need to Know About Lyme Disease in Cats
- Yes, cats can get Lyme disease: While Lyme disease is common in dogs, it remains rare in cats because many have a natural resistance. Still, infection is possible, so awareness matters for every cat’s health.
- Spread through tick bites: Lyme disease is one of several diseases spread by ticks, transmitted when an infected tick stays attached long enough to pass bacteria into the bloodstream.
- Signs can be easy to miss: When illness occurs, cats may show subtle symptoms like lameness, low energy, fever, joint discomfort, or decreased appetite — and some cats may show no obvious signs at all.
- Diagnosis requires veterinary expertise: Vets combine physical exams, blood testing, and exposure history to confirm infection and rule out other conditions with similar symptoms.
- Treatment is usually successful: Early treatment with antibiotics and supportive care helps most cats recover well and prevents complications when addressed promptly.
- Prevention makes the biggest difference: Routine tick prevention, regular checks after outdoor time, and removing the tick quickly reduce the risk of infection for pets and even humans in the household.
Need guidance for your pet? Contact us today. Our veterinary team can help you build a tick prevention plan and answer questions to keep your cat protected.
Lyme disease is widely recognized as a tick-borne illness affecting people and dogs, but many pet owners are surprised to learn that cats can also be exposed. Although infections in felines are rare, the possibility still exists—especially for cats living in tick-prone environments or spending time outdoors.
Because cases are uncommon and symptoms can be unclear, Lyme disease in cats is often misunderstood or overlooked. In this guide, we'll explore how cats may be exposed to Lyme disease, the signs and symptoms, treatment, and prevention to help support your cat’s long-term health and well-being.
Can Cats Get Lyme Disease?
Yes, it is possible for a cat to develop Lyme disease, but it is considered extremely rare and uncommon in cats. While Lyme disease is common among humans and dogs, and even considered a much more common disease in dogs, cats have a natural resistance that makes infection less likely.
Most experts in veterinary medicine agree that many cats exposed to the bacteria that cause Lyme disease do not become clinically ill. This means that even if a cat is exposed, it may not show symptoms or display signs of Lyme disease at all.
There are only a few documented cases of cats being diagnosed with Lyme disease, suggesting a form of natural immunity. Still, cats may become infected with Lyme disease under the right conditions, so it’s important for cat owners to understand the risks—especially in areas where ticks are common.
What Causes Lyme Disease in Cats
Lyme disease is caused by the bacterium Borrelia burgdorferi, a type of bacteria that is spread by ticks. The disease is primarily carried by the black-legged tick, also known as the deer tick, which is one of the known species of ticks capable of infecting animals.
These types of ticks can transmit the bacteria through a tick bite, but only if the tick is attached long enough. Typically, the tick attaches and must remain feeding for about 24–48 hours before it can transmit Lyme disease.
Not every tick carries the infection—only an infected tick can infect a host. Once the tick’s bite occurs, the bacteria may enter the bloodstream, making it possible for a cat to become infected with Lyme.
Additionally, ticks can transmit diseases to humans, so understanding tick prevention and tick control is essential—especially during tick season when pets are more likely to get exposed.
Symptoms of Lyme Disease in Cats
When cats do get sick, the signs and symptoms can be very subtle and easy to miss. Unlike dogs with more obvious illnesses, cats often hide discomfort, making early signs of Lyme disease harder to detect.
Common signs of infection may include:
Lameness in Limbs
Often shifting between legs, this affects the limb and joint areas and may appear suddenly or come and go, making the signs of disease easy to miss.
Joint Swelling and Pain
Inflammation and sensitivity in the limb and joint can cause stiffness or reluctance to move, sometimes mistaken for minor injuries or age-related issues.
Fever and Lethargy
Cats may sleep more than usual, show reduced activity, or appear withdrawn—subtle but important early signs of Lyme disease.
Loss of Appetite
A noticeable decrease in food intake may develop as the disease affects overall comfort and energy levels.
Difficulty Breathing (rare)
In uncommon situations, Lyme disease may progress and cause respiratory discomfort, usually linked to more advanced signs of infection.
Kidney Problems (uncommon)
In rare cases, the disease affects vital organs, and untreated illness may contribute to serious complications requiring prompt care to treat Lyme disease.
Some cats may not show noticeable symptoms, while others display signs of disease similar to arthritis or other infections, which can delay diagnosis. If left untreated, Lyme disease may lead to irreversible tissue damage, making early recognition essential to help treat Lyme disease effectively.
How Vets Diagnose Lyme Disease in Cats
Diagnosing Lyme disease in cats can be challenging, especially since the condition is uncommon in cats and symptoms often overlap with other illnesses. Veterinarians use both clinical evaluation and lab tests to make sure they get the right diagnosis.
The process usually involves:
- Physical examination first: The vet checks for joint pain, swelling, fever, and overall health changes that may suggest infection or inflammation.
- Blood antibody tests (ELISA): These laboratory tests serve as an initial screening to detect whether a cat has been exposed to the bacteria linked to Lyme disease.
- Western blot confirmation test: A follow-up test used to confirm positive ELISA results and improve diagnostic accuracy.
- Joint fluid analysis: Samples from affected joints help identify inflammation, infection, or other conditions that may cause similar symptoms.
- Additional tests: Vets may run imaging, urinalysis, or other additional tests to rule out diseases that cause similar symptoms and mimic Lyme disease.
- Check tick exposure history: Your vet will ask whether you recently found a tick, noticed bites, or if your cat has visited environments where ticks commonly live.
It's important to check your cat for ticks and let your vet know right away if you find one or think your pet has been around Lyme disease. Even indoor cats are not completely safe, as ticks can hitch a ride indoors on people, clothing, or other pets.
Understanding how the disease progresses helps veterinarians determine whether a cat is truly infected with Lyme disease or affected by another condition requiring different treatment.
Treatment of Lyme Disease in Felines
When a cat is diagnosed with Lyme disease, treatment focuses on eliminating the infection and managing symptoms to support recovery. Fortunately, most cats that are treated respond well when care begins early and follows veterinary guidance.
The standard approach includes:
- Doxycycline antibiotic (primary): The most common antibiotic treatment used to target the bacteria responsible for Lyme disease and control infection effectively.
- 4-week treatment course: A full month of medication helps ensure the infection is thoroughly addressed and reduces the risk of relapse.
- Amoxicillin as an alternative: May be prescribed when doxycycline is not appropriate for your cat, depending on age, health status, or medication tolerance.
- Pain management medications: Help ease joint soreness and discomfort, allowing affected cats to rest and move more comfortably during recovery.
- Anti-inflammatory drugs: Reduce swelling and stiffness, improving mobility and supporting overall healing.
If symptoms don't go away or come back, a second round of treatment may be necessary. Early intervention is still very important because waiting too long to get care can make complications more likely if the infection isn't treated.
Prevention Tips to Keep Your Cat Safe
Because Lyme disease is spread by ticks, prevention plays a major role in helping keep your cat safe and reducing exposure risks:
- Practice regular tick control and tick prevention: Use veterinarian-recommended preventatives to protect your cat from ticks, which are one of the most common external parasites affecting pets.
- After your cat has been outside, check for ticks: Regular checks can help you find them early and stop the spread of disease before it gets worse.
- Focus on safely and correctly getting rid of ticks: Prompt removal of ticks is important. This lowers the risk of infection and keeps both you and your pet safe.
- Wear gloves and store the tick in a jar if needed for identification: Always wear gloves when removing a tick, and placing the tick in a jar can help your veterinarian confirm the species if concerns arise.
- Talk to your vet about whether a vaccine is recommended: While not always necessary, discussing a Lyme disease vaccine can help determine the best prevention plan to keep your cat safe from Lyme disease.
By staying proactive with prevention and early care, you can greatly reduce risks and keep your cat safe while supporting long-term health.
Final Thoughts
Although Lyme disease is capable of infecting cats, it remains rare compared to its prevalence in dogs. Still, awareness matters. Knowing how the disease is transmitted, what signs to watch for, and how to act quickly can make all the difference in helping your cat stay healthy.
Keeping up with tick prevention, regular vet visits, and regular checks at home greatly lowers the risks. Even small changes in behaviour or movement should be looked into, especially for cats that live outside.
Frequently Asked Questions
Can cats naturally resist Lyme disease?
Yes, cats have a natural resistance that makes Lyme disease infections extremely rare.
Natural Immunity Advantage: Most cats that come into contact with Borrelia burgdorferi do not get sick, which shows that they have strong natural defences against infection.
Low Infection Rates: There aren't many documented cases, which shows how rare Lyme disease is in cats.
Asymptomatic Exposure: Many cats don't show any signs of infection even when they are around it, making it hard to find.
Stronger Resistance Than Dogs: Compared to dogs, cats are far less likely to develop noticeable illness from Lyme disease.
Risk Still Exists: Despite resistance, infection can still occur in tick-heavy environments or prolonged exposure.
How do ticks transmit Lyme disease to cats?
Ticks spread Lyme disease through prolonged attachment and feeding on a host.
Carrier of Bacteria: Ticks, especially deer ticks, carry Borrelia burgdorferi, the bacteria responsible for Lyme disease.
Transmission Timing: The tick must stay attached for about 24–48 hours before transmitting the infection.
Infected Tick Requirement: Not all ticks carry Lyme disease—only an infected tick can pass it to a cat.
Entry Through Bite: The bacteria enter the bloodstream through the tick’s bite during feeding.
Risk of Environmental Exposure: Being outside in areas with tall grass, animals, or trees increases the chance of getting ticks.
What are the early signs of Lyme disease in cats?
Early symptoms are often subtle and easy to overlook, requiring close observation.
Shifting Lameness: Cats may limp on different legs, which can make the problem seem like it's not always there or is only temporary.
Joint Pain: Swelling and stiffness in joints can make it hard to move and feel like a small injury.
Low energy levels: Feeling tired and sleeping more often are two common early warning signs.
Reduced Appetite: Cats may eat less due to discomfort or overall illness.
Mild Fever Indicators: A slight fever may occur, though it is not always easily noticeable at home.
How does a Veterinarian diagnose Lyme disease in cats?
A Veterinarian uses a combination of physical exams, lab tests, and history to confirm infection.
Initial Physical Examination: The vet checks for joint pain, swelling, fever, and other clinical signs.
ELISA Blood Testing: This test looks for antibodies that are linked to being exposed to Lyme disease.
Western Blot Confirmation: A second test that confirms positive ELISA results makes the test more accurate.
Joint Fluid Analysis: Samples of fluid can help find inflammation or rule out other joint problems.
Exposure History Review: Information about tick exposure or outdoor activity helps guide diagnosis.
What is the treatment for Lyme disease in cats?
Antibiotics and supportive care are usually used to treat Lyme disease and help with symptoms.
Doxycycline as Primary Antibiotic: This is the most commonly prescribed medication to eliminate the infection.
Full Treatment Duration: A 4-week course makes sure that the bacteria are effectively targeted and lowers the risk of relapse.
Other Medications: If doxycycline doesn't work for the cat, amoxicillin may be used instead.
Pain Relief Support: Medicines help ease joint pain and make recovery more comfortable.
Anti-Inflammatory Care: These medicines help the cat heal by reducing swelling and making it easier for them to move around.
