By Dial A Vet Veterinary Team
Parasites are a routine part of feline preventive care, even for indoor cats. Fleas hitchhike on clothing and other pets, worm eggs contaminate litter areas and prey, and mites can spread in multi-cat homes. Knowing the main groups, the signs they cause, and why veterinary prevention beats random supermarket products keeps your cat healthier and reduces risks to people.
Key takeaways
- Fleas, roundworms, hookworms, tapeworms and ear mites are among the most common issues.
- Indoor cats still need parasite prevention tailored by your vet.
- Some cat parasites can affect people, especially children. Hygiene matters.
- Scratching, scooting, weight loss, diarrhoea and ear shaking are common clues.
- Related guides: external parasites A to Z, cat fleas, and ear mites.
External parasites
Fleas
Cat fleas cause itching, flea allergy dermatitis, and tapeworm infection when cats groom and swallow fleas. Black flea dirt in the coat is a classic clue. See also the flea life cycle.
Mites
Ear mites create dark, coffee-ground debris and intense head shaking. Other mites (including Demodex and Notoedres) are less common but cause crusting and hair loss. Our mange in cats page covers skin mites.
Ticks
In Australia, paralysis ticks (Ixodes holocyclus) are a medical emergency for cats as well as dogs. Sudden weakness, wobbly gait or breathing change after outdoor access needs urgent care. See tick paralysis for the syndrome (cats are also at risk).
Internal parasites
Roundworms and hookworms
Kittens often acquire roundworms from the queen. Hookworms can damage the gut and blood. Pot-bellied appearance, poor coat, vomiting or diarrhoea can appear, though some cats show few signs. Related worm topics for dogs (similar principles): roundworms and hookworms.
Tapeworms
Often linked to fleas. Owners may see rice-grain segments near the anus or on bedding.
Other parasites
Lungworm, heartworm (region-dependent risk), Giardia and coccidia can cause respiratory or gut signs. Toxoplasma is a protozoal parasite of cats with special pregnancy hygiene implications for people. Your vet will advise based on lifestyle and location.
Signs to watch for
- Scratching, chewing or over-grooming
- Hair loss, scabs or small red bumps on people in the household
- Head shaking, smelly ears
- Vomiting, diarrhoea, scooting or visible worms
- Weight loss, pot belly in kittens, lethargy
- Coughing or breathing change
When it is an emergency
Seek urgent care for collapse, pale gums, laboured breathing, continuous vomiting or diarrhoea with weakness, or suspected paralysis tick. Kittens dehydrate quickly.
How vets diagnose parasites
Coat combing, ear swabs, skin scrapings, faecal flotation or antigen tests, and sometimes blood tests or imaging are used depending on signs. Do not guess with multiple random products; some combinations are unsafe, especially in cats.
Multi-cat homes and shelters
When several cats share space, parasites move quickly. Isolate new cats until a vet has checked them, wash bedding in hot cycles where fabric allows, and treat all in-contact cats when fleas or mites are found. Litter trays should be scooped daily. Kittens need age-appropriate products only; never split adult pipettes by guesswork.
Treatment and prevention overview
Your veterinarian will select parasite preventives suited to your cat's age, weight and health. Year-round flea control and regular worming schedules are common recommendations. Environment treatment may be needed for heavy flea infestations. Never use dog-only parasite products on cats. Avoid tea tree oil and other essential oils marketed for fleas; they can be toxic. See tea tree oil and fleas.
Protecting people
Wash hands after litter duties, keep children's sandpits covered, and cook meat properly. Pregnant people should discuss Toxoplasma hygiene with their doctor and avoid cleaning litter if possible, or use gloves and daily scooping.
FAQ
Does an indoor cat need flea prevention?
Usually yes. Fleas readily enter homes on people and other animals.
Are supermarket spot-ons fine?
Some are incomplete or unsafe. Ask your vet which products are appropriate for Australian parasites and your cat.
Can I catch worms from my cat?
Some parasites have zoonotic potential. Good hygiene and veterinary worming reduce risk.
My cat hunts. Does that change the plan?
Hunting increases exposure to intermediate hosts. Tell your vet so prevention can match lifestyle.
Talk with a vet
If your cat is scratching, losing weight, or due for a prevention review, a Dial A Vet veterinarian can help you choose a sensible parasite plan with your local clinic. Book a Dial A Vet consult.
References
- Merck Veterinary Manual. Parasitic Diseases of Cats.
- Companion Animal Parasite Council and Australian veterinary parasitology guidance (regional risk discussion with your vet).
- RSPCA Australia. Cat parasite prevention information.
Disclaimer: Educational only. This page does not replace an examination or advice from your own veterinarian. If you are worried about your pet right now, contact your local vet or nearest emergency animal hospital.
