Yes, cats can be infected with the bacteria that cause Lyme disease — but they very rarely become ill from it. Cats appear to be naturally resistant, and confirmed cases of a cat actually getting sick with Lyme disease are uncommon, unlike in dogs and people, where the disease is well known and frequently diagnosed. So if you pull a tick off your cat, Lyme disease is not the first thing to fear.
That said, “rare” is not “impossible,” and ticks carry other diseases that are genuinely dangerous to cats. This guide explains how Lyme transmission works, the symptoms vets watch for, and — most importantly — the tick prevention habits that actually protect your cat.
Can cats really get Lyme disease?
Lyme disease is caused by a spiral-shaped bacterium called Borrelia burgdorferi. According to the Cornell Feline Health Center, the bacteria are capable of infecting cats, but the disease itself has essentially never been seen in a cat outside a laboratory setting. Cats that live in tick-heavy areas can test positive for antibodies — proof they were exposed and their immune system responded — yet stay perfectly healthy.
What this resistance means in practical terms:
- A tick bite on your cat is exposure, not a diagnosis.
- A positive antibody test in a healthy cat usually means monitoring, not panic.
- The odds are far higher that a tick is carrying something else, or that the bite itself causes a local sore, than that your cat develops Lyme disease.
Compare that with dogs, who commonly develop fever, joint pain, and loss of appetite after infection, and the difference is striking. Your cat shares your home and garden, not your dog’s level of risk.
How do ticks pass Lyme disease to cats?
Ticks cannot jump or fly. They wait on grass and low plants, grab onto a passing animal, crawl to a good spot, and bite. The Lyme bacteria are carried mainly by black-legged ticks (often called deer ticks), including the tiny young nymph stage, which is easy to miss in a cat’s coat.
The bacteria live inside the tick and move into the host while the tick feeds. Feeding takes time — ticks stay attached for days — and this works in your favour. Transmission of Borrelia generally needs the tick to be attached and feeding for roughly a day and a half to two days. A tick you find and remove the same day, while it is still flat and small, is very unlikely to have passed anything on. This is why daily tick checks during tick season are such powerful protection.
Cats pick up ticks in predictable places:
- Gardens with long grass, leaf litter, or woodpiles
- The edges of fields, woods, and walking trails
- Anywhere deer, mice, and other wildlife pass through
- From hunting: a cat that catches mice and birds meets the very animals ticks feed on
What are the symptoms of Lyme disease in cats?
Because illness is so rare in cats, vets base their expectations on the infection itself and on what is seen in other species. If a cat did become ill, signs would be expected in the weeks after the bite and would most likely include:
- Fever — a warm, quiet cat that feels “off” is often running one
- Lethargy — sleeping far more than usual and losing interest in play
- Joint pain and stiffness — limping, reluctance to jump, or pain that seems to move from leg to leg as different joints flare up
- Loss of appetite — a cat that feels feverish and achy often stops eating; if yours has skipped meals for more than a day, our guide on why a cat won’t eat covers what to check
Notice how general these signs are. Fever, tiredness, stiffness, and poor appetite fit dozens of other feline problems. That is precisely why Lyme disease in cats is so hard to pin down — and why a tick history and proper testing matter more than any single symptom.
How is Lyme disease diagnosed in cats?
There is no single test that proves a cat is sick because of Lyme bacteria. Diagnosis is difficult for several reasons:
- Antibody tests show exposure, not illness. Many healthy cats in tick areas carry antibodies. A positive result in a cat with no signs usually changes nothing.
- The bacteria hide well. Borrelia lives in tissues rather than floating freely in the blood, so blood tests rarely find the organism itself.
- The signs have many other causes. Your vet must rule out injuries, arthritis, infections, and other tick diseases first.
In practice, a vet who suspects Lyme disease will combine the story — a known tick bite, time spent outdoors, compatible signs — with antibody testing and a process of elimination. One clue vets use is response to treatment: a cat that improves quickly on the right antibiotic likely had a tick-borne infection, even if Lyme itself cannot be proven beyond doubt.
How is Lyme disease treated in cats?
When a vet decides treatment is justified, the standard choice is an antibiotic — most often doxycycline, given for a course of several weeks. Tetracycline-family antibiotics are the usual weapons against Borrelia and several related tick-borne bacteria, which is one reason the “treat and watch the response” approach is common: the same drug covers the most likely culprits. The Cornell Feline Health Center notes that antibiotics such as doxycycline are apt to be effective against tick-borne diseases, especially when treatment starts early.
Two firm rules apply:
- Vet only, always. Doxycycline dosing in cats matters, and the tablets can irritate or damage a cat’s esophagus if given carelessly. Never start leftover antibiotics, and never use medicine prescribed for a dog or a person.
- Healthy, positive-testing cats usually get no treatment. If your cat has antibodies but no signs, most vets will recommend tick prevention and observation rather than antibiotics.
How can you protect your cat from ticks?
This is where your effort pays off — not just against Lyme disease, but against every tick-borne illness.
Use a cat-safe tick prevention product
Ask your vet for a product made for cats that covers ticks, and use it on schedule through tick season (year-round in mild climates). Because cats are unusually sensitive to many insecticides, only use products your vet recommends for cats specifically.
Never use dog tick products on a cat. Many dog spot-ons contain concentrated permethrin, which is highly toxic to cats. A cat treated with a dog product — or even one that grooms or snuggles a freshly treated dog — can develop tremors and seizures, and it can be fatal. Check every label for “safe for cats,” keep treated dogs and cats apart until the product dries, and if a mistake happens, wash the cat with mild dish soap and call your vet or a poison helpline immediately.
Check your cat daily
Run your hands slowly over your cat after outdoor time, feeling for small bumps. Pay attention to the ears, around the head and neck, under the collar, the armpits, the belly, and between the toes — the warm, sheltered spots ticks prefer. Removing a tick within the first day or so dramatically cuts the chance of Lyme transmission.
Remove ticks safely
Found one? Do not panic, and do not use old remedies like burning it, nail polish, or oil — these do not work and can hurt your cat.
- Use fine-tipped tweezers or a tick hook.
- Grasp the tick as close to the skin as possible, without squeezing its body.
- Pull upward with steady, even pressure (or twist gently if using a tick hook, following its instructions).
- Clean the bite area and your hands with antiseptic or soap and water.
- Save the tick in a sealed container with the date written on it, in case your cat develops signs and your vet wants it identified.
Watch the spot for a few weeks for swelling or a sore, and note the date of the bite — the timeline helps your vet later.
Make the garden less tick-friendly
Keep grass short, clear leaf litter and brush, and stack firewood neatly in a dry spot. If your cat roams, understand that long grass and wildlife corridors are tick habitat, and a daily check matters even more.
What other tick diseases should cat owners know about?
Lyme gets the headlines, but for cats it is not the main event. The Cornell Feline Health Center’s overview of ticks and cats lists several tick-transmitted illnesses far more serious for cats:
Cytauxzoonosis (bobcat fever)
The one to take most seriously. This protozoal infection, carried by ticks that have fed on bobcats, causes severe anemia, high fever, lethargy, jaundice (yellowing of the eyes and gums), and breathing difficulty, and it is often fatal even with treatment. It occurs mainly in the south-central and southeastern United States. A cat that becomes suddenly feverish, weak, and starts breathing fast during tick season in those regions needs an emergency vet visit, the same day.
Hemobartonellosis (feline infectious anemia)
A bacterial parasite that attacks red blood cells, causing anemia. Signs include pale gums, tiredness, and loss of appetite. Unlike cytauxzoonosis, it often responds well to antibiotics when caught early.
Tularemia (rabbit fever)
Uncommon but dangerous, and one of the few that can spread to people. It causes fever, swollen lymph nodes, and abscesses. Cats that hunt rabbits are most at risk.
The practical lesson: tick prevention is not about Lyme disease at all, really. It is about this whole group of infections, several of which can kill a cat quickly.
When should you call the vet?
Contact your vet promptly if:
- You find a tick that has clearly been attached and feeding (swollen/engorged) and your cat becomes unwell in the following weeks
- Your cat develops a fever, stops eating, or becomes unusually tired after tick exposure
- You notice limping, stiff or swollen joints, or reluctance to jump
- Your cat has pale or yellow gums, weakness, or fast or laboured breathing after time outdoors in tick season — treat breathing changes as urgent
- A bite site becomes swollen, hot, oozing, or forms a lump that does not settle
- Your cat shows tremors or wobbliness after any flea or tick product was applied — this is an emergency, especially if a dog product was involved
Mention the tick bite and its date when you call. It is the single most useful detail you can give your vet.
Conclusion
Can cats get Lyme disease? Technically yes — the bacteria can infect them — but cats are so resistant that vets almost never see a cat made ill by it. The real reasons to take ticks seriously are the other diseases they carry, like cytauxzoonosis and feline infectious anemia. A vet-approved, cat-safe tick preventive, daily hands-on checks in tick season, and prompt, proper tick removal will protect your cat far better than worrying about Lyme disease ever could.
Frequently asked questions
Can my cat give me Lyme disease?
No, not directly. Lyme disease is not passed from a cat to a person by touch, bites, or scratches. The only route is the bite of an infected tick. However, a roaming cat can carry unattached ticks into your home and garden, where they may later bite people — one more reason daily tick checks protect the whole household.
My cat tested positive for Lyme antibodies but seems fine. What now?
This is common in tick-heavy regions and usually means your cat was exposed at some point and fought the bacteria off. Most vets will not prescribe antibiotics for a healthy cat — just consistent tick prevention and a watch for signs like fever, stiffness, or appetite loss.
Is there a Lyme vaccine for cats?
No. Lyme vaccines exist for dogs, but there is no licensed Lyme vaccine for cats. For cats, protection means tick prevention products, daily checks, and fast removal.
How long must a tick be attached to transmit Lyme disease?
Generally around 36 to 48 hours of feeding. The bacteria need time to move from the tick’s gut into the cat. This is why a tick found and removed on the same day, still flat and unengorged, is very unlikely to have transmitted anything.
Can indoor cats get ticks?
Rarely, but yes. Ticks are brought indoors on dogs, on clothing and shoes, and on firewood or plants. An indoor cat’s risk is low, not zero — so if you find a tick on a house cat, check the dog, too.
Are dog flea and tick products really that dangerous for cats?
Yes. Concentrated permethrin, found in many dog spot-on products, is one of the most common causes of poisoning in cats. Signs include tremors, twitching, and seizures, and it can be fatal without treatment. Only ever use products clearly labelled for cats.
