Paralysis Ticks in Cats: Signs, What to Do and How to Prevent Them in Australia

Every spring, vets along Australia's east coast start seeing the same emergency: a cat that was perfectly well yesterday is now wobbly, wheezing or refusing food, and somewhere in its fur is a small grey tick. The paralysis tick is one of the most serious everyday threats to cats in Australia, but it is also one where quick action makes a real difference.

This guide explains where paralysis ticks live, how to recognise the early signs in cats (which are often different from the signs in dogs), what to do the moment you find a tick, how vets treat tick paralysis, and how to protect your cat through the season.

What is the paralysis tick?

The Australian paralysis tick, Ixodes holocyclus, lives along the eastern coast of Australia, from Queensland through New South Wales and into Victoria, including some areas inland of the coast. It is most common in bushland and scrub, and in suburbs that back onto it.

The tick's natural hosts are native animals such as bandicoots and possums, which have built up a degree of immunity to its toxin. Cats and dogs have not. When a female tick attaches and feeds, she injects a toxin that interferes with the way nerves signal muscles. The result is weakness that can spread to the muscles used for breathing and swallowing.

The MSD Veterinary Manual describes I. holocyclus as causing the most severe form of tick paralysis seen anywhere. In Victoria and Tasmania, a related species, the southern paralysis tick (Ixodes cornuatus), has also been linked to cases.

When is paralysis tick season?

RSPCA NSW says paralysis tick season usually runs from spring to autumn, with most cases in spring and summer. RSPCA Queensland puts the main season at October to March, and notes that mild winters and heavy rain early in spring and summer tend to mean more cases.

Ticks can still turn up at other times of year, so a cat with suspicious signs should never be ruled out just because it is winter.

How quickly does tick paralysis develop?

According to the MSD Veterinary Manual, signs of paralysis from I. holocyclus usually appear three to five days after the tick attaches (rarely up to 18 days), and then progress quickly over the next 24 to 48 hours.

That window is why daily checks matter. A tick found and removed early, before the toxin has built up, is far less likely to cause serious illness than one that has been feeding for several days.

Signs of tick paralysis in cats

Cats often show tick paralysis differently from dogs. The classic picture of a dog with wobbly back legs is well known, but in cats the early signs can be subtle and are easy to mistake for a cold, asthma or simply a grumpy mood.

Early signs

RSPCA NSW lists these signs in cats:

• Agitation or unusual anxiety
• A change in the sound of the meow
• A soft grunt at the end of each breath out
• Weakness
• Gagging or drooling
• Not wanting to eat

The MSD Veterinary Manual notes that cats can develop an asthma-like narrowing of the airways while they are only mildly weak, with a wheeze when breathing out, visible effort from the belly to push air out, and tiring easily. RSPCA Queensland adds that some cats and dogs don't show the typical back-leg weakness at first, and that a gurgling or choking cough may be the first thing you notice.

Later signs

As the toxin takes effect, a cat may:

• Stagger, sway or walk unsteadily
• Become weak in the back legs, then all four legs
• Have obvious difficulty breathing
• Be unable to stand

Any of these signs in a cat that lives in a tick area should be treated as an emergency, whether or not you have found a tick.

Ticks you might not find

Ticks are often hidden in thick fur, in skin folds or around the face. You may also find a "crater": a small raised lump or scab where a tick was attached and has since dropped off or been groomed away. RSPCA NSW advises treating a crater the same way as a tick, because the cat may already have received toxin.

What to do if you find a tick on your cat

RSPCA NSW's advice is straightforward.

1. Stay calm and keep your cat calm. Stress and handling can make breathing problems worse.
2. Search for more ticks. It is common to find more than one.
3. Don't give food, water or anything by mouth. The toxin can affect swallowing, which raises the risk of food or water going into the lungs.
4. Call a vet straight away, even if your cat seems completely normal. If it is after hours, go to a 24-hour emergency hospital. Don't wait until the morning.

How to remove a paralysis tick

If you can remove the tick safely, do it as soon as possible rather than leaving it to keep feeding. RSPCA NSW suggests:

• Wear gloves if you can, and have a sealed container with some alcohol ready for the tick.
• Use fine-tipped tweezers or a tick remover.
• Grip the tick by its head, right at the skin, without squeezing its body.
• Twist as you pull, so the mouthparts come out with it.
• Keep the tick in the container in case your vet wants to see it.

If you're not confident, ask your vet to show you the technique. Many clinics are happy to do this during a routine visit before the season starts.

Why your cat still needs a vet after the tick is out

The MSD Veterinary Manual explains that removing the tick does not immediately stop the illness. Signs can keep getting worse for around 24 hours afterwards, because toxin already in the body continues to act. A cat that looks fine when the tick comes out can deteriorate later that day.

If your vet examines your cat and finds no signs of paralysis, they may simply remove the tick and ask you to monitor your cat closely at home. That decision should come from the vet, not from how your cat looks in the first hour.

How vets treat tick paralysis in cats

Treatment depends on how unwell the cat is, but usually involves some or all of the following.

Finding and removing every tick

Vets search the whole body, often several times, because a missed tick will keep releasing toxin. Most ticks are found around the head and neck. Some clinics clip the fur to make searching easier.

Tick antitoxin serum

Tick antitoxin serum (TAS) neutralises toxin that is still circulating in the blood. The MSD Veterinary Manual describes it as the only effective option for cats with tick paralysis and recommends giving it as early as possible. Like any antiserum, it carries some risk of reactions, and cats that have had TAS before have a higher risk of a serious allergic reaction. Your vet will weigh this up.

Supportive care

Cats with tick paralysis are often hospitalised in a quiet, dark, low-stress area. Depending on the case, care may include:

• Sedation to reduce anxiety
• Oxygen support for breathing difficulties
• Nursing care, including keeping the cat clean and comfortable while it can't move normally
• In severe cases, help with breathing through a ventilator at a specialist or emergency hospital

The MSD Veterinary Manual notes that cats can be very anxious with this condition, and that forcing procedures on a stressed cat can be dangerous. This is one reason vets handle these patients gently and keep them in quiet wards.

Recovery

Cats generally have a better outlook than dogs, according to the MSD Veterinary Manual. Before going home, a recovering cat should be able to walk and land normally. Vets may watch how the cat lands when lowered gently to the floor: a cat that has recovered lands lightly with good control of its head.

Once home, keep your cat quiet and indoors for the period your vet recommends, and follow any instructions about when to reintroduce food and water. Recovery can take days, and a cat that has had tick paralysis is not protected against a future tick.

How to protect your cat from paralysis ticks

No single measure is perfect. The safest approach combines several.

1. Keep your cat indoors or contained

RSPCA Queensland lists keeping pets indoors as a way to reduce exposure to ticks. A cat that doesn't roam through bushland or long grass has far fewer chances to pick one up. Contained cats are also safer from cars and fights, and protect native wildlife.

If you'd like to give your cat outdoor time safely, a cat enclosure or catio is a good option. See our guide to cat enclosures and catios. Keep grass and plants around the enclosure trimmed, because ticks wait on vegetation for a host to brush past.

Some parts of Australia now require cats to be contained. Our guide to cat laws in Australia explains the rules by state and territory.

2. Search your cat every day

RSPCA NSW recommends a tick search at least once a day during the season, even if your cat is on a tick prevention product. Products reduce the risk; they don't remove it.

How to do a daily tick search:

• Use your fingertips, not your eyes. Ticks and craters feel like small lumps, and they're easy to miss in fur.
• Start at the head and work back. Most ticks attach in front of the front legs, so spend extra time on the face, ears, chin and neck.
• Check under the collar if your cat wears one, and inside the ears.
• Then move over the rest of the body: armpits, between the toes, the paws, the groin and the tail.
• Do it at the same time every day, so it becomes routine. Many cats come to enjoy it as a slow, gentle grooming session.

3. Use a tick prevention product made for cats

There are products registered in Australia for paralysis tick control in cats, including some spot-on treatments. They differ in how long they last and what else they cover, such as fleas and worms. Ask your vet which suits your cat's age, weight and health, and always check that the pack specifically says it is for cats and for paralysis ticks.

4. Never use dog products on cats

This is the most important safety rule. RSPCA NSW warns that some dog products can kill cats. Many dog flea and tick treatments contain permethrin, which is highly toxic to cats. A cat can be poisoned by a dog product applied to it by mistake, and sometimes even by close contact with a dog that has just been treated.

Signs of permethrin poisoning include twitching, tremors and seizures. If you think your cat has been exposed, call your vet or an emergency hospital immediately.

5. Reduce ticks around your home

You can't remove ticks from the environment completely, but you can make your yard less inviting:

• Keep lawns short and cut back long grass and leaf litter.
• Keep the area around cat enclosures and doors tidy.
• Be aware that ticks are carried by native animals such as bandicoots, so yards that back onto bushland carry a higher risk.

Paralysis tick checklist for cat owners

Save or print this list for tick season:

• [ ] Ask your vet about a tick prevention product made for cats, before the season starts.
• [ ] Never use dog flea or tick products on your cat.
• [ ] Keep your cat indoors or in an enclosure, especially in bushland areas.
• [ ] Search your cat with your fingertips every day, head first.
• [ ] Keep tweezers or a tick remover, gloves and a small container in your first aid kit.
• [ ] Save the number of your nearest 24-hour emergency vet in your phone.
• [ ] If you find a tick or crater: remove the tick, give nothing by mouth, and call the vet straight away.

When to see a vet urgently

Go to a vet immediately, day or night, if your cat:

• Has a tick or tick crater, even if it seems well
• Has a change in its meow, a grunt when breathing out, a cough or gagging
• Is breathing with effort, wheezing or breathing with its mouth open
• Is wobbly, weak or unable to stand
• Is drooling or refusing food

For a broader look at signs that something is wrong, see our guide on how to tell if your cat is sick.

Frequently asked questions

Can indoor cats get paralysis ticks?

Yes, although the risk is much lower. Ticks can be carried inside on clothing, on other pets or on firewood and plants. Indoor cats in tick areas still benefit from regular checks during the season, and your vet may recommend prevention depending on where you live.

My cat seems fine after I removed a tick. Do I still need a vet?

Yes. Signs can keep getting worse for around 24 hours after the tick is removed, so call your vet straight away and follow their advice. Don't give food or water until a vet says it is safe.

What does a paralysis tick look like?

Before it feeds, a paralysis tick is small and flat, with a grey-blue body and legs near the front. As it feeds, its body swells and becomes rounder and lighter in colour. Because many tick species look similar to an untrained eye, it is safest to treat any tick on a cat in a paralysis tick area as a paralysis tick.

Can I use a tick collar on my cat?

Only use a product that is clearly labelled for cats, and ask your vet first. Some collars and other tick products are made only for dogs and can be dangerous for cats.

Will my cat be immune after surviving tick paralysis?

No. Your cat can be affected again by another tick, and the next episode can be just as serious. Keep up prevention and daily checks.

Are paralysis ticks found in Perth or Adelaide?

The eastern paralysis tick, Ixodes holocyclus, is found along the east coast. If you live elsewhere, your vet can tell you about the ticks in your area. If you travel to the east coast with your cat, ask your vet about protection before you go.

Sources

• RSPCA NSW, How to protect your pets from deadly paralysis ticks this season
• RSPCA Queensland, What you need to know about ticks
• MSD Veterinary Manual (Australia), Overview of tick paralysis

This guide is general information only and is not a substitute for advice from your vet. If you think your cat has tick paralysis, contact a vet immediately.