Paralysis ticks are among the most dangerous parasites your dog or cat can encounter in eastern coastal Australia. A single tick can inject a potent neurotoxin that leads to progressive muscle weakness and can be fatal. Prevention, daily tick searches and prompt veterinary care all matter.
What Are Paralysis Ticks?
Australian paralysis ticks (Ixodes holocyclus) are small, eight-legged parasites that attach to a host animal and feed on blood. As they feed, they secrete a neurotoxin through their saliva.
This toxin interferes with communication between nerves and muscles. Affected animals can develop progressive weakness, eventually affecting breathing. Both dogs and cats are susceptible. Signs may be delayed, so an apparently well pet can still be at risk.
Where Paralysis Ticks Live
Paralysis ticks occur along eastern coastal areas of Australia. They favour warm, humid environments with dense vegetation, including coastal scrubland, rainforest margins and bushy areas where native wildlife act as hosts.
Ticks are often more active during warmer, wetter months, but can remain active year-round in some regions. Even a short walk through long grass or leafy bush trails can expose your pet.
Urban areas are not immune. Wildlife corridors, overgrown backyards and parklands bordering bushland can also harbour paralysis ticks.
Signs of Tick Paralysis in Dogs and Cats
Warning signs can be subtle. They include:
- Changed bark or meow — the voice may sound weaker or hoarse.
- Wobbly legs or weakness — your pet may stumble, sway or have trouble jumping.
- Gagging, retching or difficulty swallowing.
- Heavy or laboured breathing.
These symptoms require emergency veterinary care immediately. Do not wait to find a tick.
What to Do If You Find a Tick
If you find a tick or a tick crater where one may have detached, contact a vet promptly, even without symptoms. Do not wait for symptoms or monitor at home instead of seeking veterinary advice. Removing the tick does not end the risk; signs can develop or worsen afterwards.
For removal, follow your tick-removal tool's instructions; different tools use different techniques. If using fine-tipped tweezers, grasp close to the skin and pull steadily without squeezing the tick's body. Do not delay veterinary contact while attempting removal.
How to Protect Your Pet
Ask your vet about prevention specifically labelled for paralysis ticks and suitable for your pet's species, weight and age. Follow the label's application and repeat-treatment instructions. Dog tick products can poison cats; never use a dog-only product on a cat.
No preventative guarantees complete protection, and tick-killing times vary by product. In affected areas, discuss year-round prevention with your vet. Keep grass and shrubs trimmed and avoid dense bush where practical.
Daily Full-Body Tick Checks
A daily hands-on, full-body tick search should remain routine, even when your pet receives prevention.
Start at the nose and work backwards, feeling carefully through the coat over the entire body. Pay particular attention around the lips, eyelids, ears, neck, armpits, groin and between every toe. Continue the search if you find one tick, as there may be others.
For further guidance, see UQ VETS: Cat and dog tick paralysis.