What Diseases Can Ticks Transmit to Cats?
At a Glance
- Short answer: Cats rarely get clinical Lyme disease — the bigger feline concerns are anaplasmosis, babesiosis, tick paralysis, and the danger of using a dog tick product on a cat.
- This is about: Ticks
- Why timing matters: attachment time drives disease risk
The short of it
Cats rarely get clinical Lyme disease — the bigger feline concerns are anaplasmosis, babesiosis, tick paralysis, and the danger of using a dog tick product on a cat.
The tick risk clock
Cat tick-disease risk looks different from dog and human risk in New Hampshire — genuinely lower for the disease most people worry about (Lyme), but not zero across the board.
The longer it feeds, the higher the risk — so remove it early.
Generally lower transmission risk for most tick-borne pathogens in cats, per veterinary sources.
The window in which most feline tick-borne pathogens are more likely to transmit — another reason for prompt removal.
Tick paralysis (a toxin, not an infection) doesn't follow the same clock and can develop from an attached tick regardless of exact timing.
What NH’s blacklegged tick can carry
- Watch for itLyme disease
Cats are strikingly resistant — Cornell's Feline Health Center reports no naturally acquired clinical case documented outside a lab in North America. Not a major worry for cats, unlike dogs or people.
- Watch for itAnaplasmosis / babesiosis
Documented in cats but uncommon; watch for fever, lethargy, or pale gums after a known bite.
- Rare · seriousCytauxzoonosis ("bobcat fever")
Severe, sometimes fatal, but mainly a southern and south-central US disease spread by the lone star and American dog tick — not a primary NH concern, though a cat with recent travel or unusual illness should still be evaluated.
- Watch for itTick paralysis (non-infectious)
A toxin in tick saliva can cause ascending weakness; animals typically improve within about 24 hours of the tick's removal.
Calibrated from: Cornell Feline Health Center; VCA; AVMA
What to do about it
For pets
- Lethargy or unusual quietness
- Fever
- Poor appetite
- Pale gums or jaundice (yellowing)
- Difficulty breathing
- Sudden hind-leg weakness (possible tick paralysis)
- Don't use a dog-labeled tick product (especially permethrin) on a cat — it can be lethal
- Don't assume 'cats don't get Lyme' means no tick disease is possible for your cat
- Don't self-treat a lethargic or feverish cat at home
- Don't wait if your cat shows sudden weakness in the hind legs — get veterinary care the same day
Call your veterinarian promptly if any of these develop in the days to weeks after a tick bite — several feline tick diseases can progress quickly, and tick paralysis in particular warrants same-day evaluation.
The full picture
Why cats are different from dogs and people
It's a genuinely reassuring, well-documented fact: cats are highly resistant to clinical Lyme disease. Per Cornell's Feline Health Center, no naturally acquired clinical case has been documented outside a laboratory setting in North America, even though cats are certainly exposed to infected ticks. Researchers aren't entirely sure why cats resist it so well, but the practical effect is that Lyme disease — the disease most owners have heard of and worry about — isn't the top feline tick concern the way it is for dogs and people.
The diseases that do matter for NH cats
Anaplasmosis and babesiosis are both documented in cats, though less commonly than in dogs, and can cause fever, lethargy, and anemia-related signs like pale gums. Cytauxzoonosis ("bobcat fever") is the disease with the scariest reputation — often severe or fatal — but it's spread mainly by the lone star tick and American dog tick and is predominantly a southern and south-central US problem; it's not a primary concern for indoor-outdoor cats in New Hampshire, though any cat with unexplained severe illness after tick exposure, especially with travel history, should be evaluated. Heavy tick infestation can also cause blood loss and skin irritation on its own, independent of any specific pathogen.
The bigger real-world risk: product misuse
Honestly, the most dangerous tick-related event for an NH house cat usually isn't the tick bite itself — it's a well-meaning owner applying a dog's tick product to the family cat, or letting a cat groom or rest against a dog treated with a concentrated permethrin/pyrethroid spot-on. Cats lack the liver enzyme needed to safely process permethrin, and dog products can contain it at levels that are toxic, potentially lethal, to cats. Never apply a dog product to a cat, and keep a freshly treated dog separated from cats for the period the label specifies. A specific product's cat-safety lives at /is-pest-control-safe-for-pets.
What to watch for and when to call the vet
After finding an attached (or recently removed) tick on your cat, watch for lethargy, fever, poor appetite, pale or yellowing gums, breathing difficulty, or sudden hind-leg weakness over the following days to weeks. None of these are cause for an automatic emergency-room trip the moment you find a tick — most single bites cause no illness at all — but any of them appearing is a reason to call your veterinarian rather than wait it out.
Key takeaways
- Cats are highly resistant to clinical Lyme disease — no naturally acquired case documented outside a lab in North America.
- Anaplasmosis and babesiosis do occur in cats, though uncommonly; cytauxzoonosis is real but mainly a southern-US risk, not a primary NH concern.
- The bigger practical danger for NH cats is a dog tick product used on a cat by mistake — permethrin can be lethal to cats.
- Call your vet for lethargy, fever, poor appetite, pale gums, or sudden hind-leg weakness after a tick bite.
Cats and ticks in New Hampshire
Indoor-outdoor cats in Manchester, Nashua, Concord, and the surrounding towns do pick up NH's blacklegged (deer) ticks, but the Lyme-heavy framing that applies to dogs and people mostly doesn't apply to cats. Anchor Pest Services treats the yard so fewer ticks make it onto your cat in the first place; product choice and any illness after a bite are always a conversation with your veterinarian.
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- NH-licensed applicator · #782664
- Same-day service
- Family-owned since 2017
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Southern New Hampshire
Fewer ticks in the yard, fewer risky product decisions
The best tick defense for a cat starts outside. Anchor treats the yard while your vet handles cat-safe, prescribed tick prevention.
Frequently asked questions
Sources(4)
- [1]Cornell Feline Health Center — Ticks and Your Cat
Cats and clinical Lyme resistance; general feline tick-disease overview
veterinaryverified 2026-07-14 - [2]Cornell Feline Health Center — Lyme Disease: A Potential, But Unlikely, Problem for Cats
No naturally acquired clinical Lyme case documented in North American cats
veterinaryverified 2026-07-14 - [3]VCA Animal Hospitals — Cytauxzoonosis in Cats
Cytauxzoonosis severity and geographic vector distribution
veterinaryverified 2026-07-14 - [4]AVMA — Safe Use of Flea and Tick Preventive Products
Permethrin toxicity to cats; species-specific product use
veterinaryverified 2026-07-14
Written & reviewed by
VerifiedDaniel Brady
NH-Licensed Pesticide Applicator · License #782664 (NHDAMF, RSA 430)
Daniel Brady is the New Hampshire–licensed applicator behind Anchor Pest Services, a family-owned pest control company serving the Manchester area since 2017.
Last updated 2026-07-14
Integrated Tick Reduction
The Yard Side of Cat-Safe Tick Control
Anchor Pest Services reduces the tick population in your yard so fewer ticks ever reach your cat, across southern and central New Hampshire. Pair it with your veterinarian's cat-safe, prescribed tick prevention — never a dog product. Family-owned since 2017, NH license #782664.
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