Quick answer: Common cat parasites include fleas, ticks, ear mites, roundworms, tapeworms, hookworms and heartworm. Even indoor cats can get them. Your vet can recommend cat-safe prevention and run fecal tests. Never use dog flea products on cats, since some are toxic to cats.
Parasites are some of the most common health problems in cats. Some just cause itching. Others can lead to anemia, weight loss, or serious disease, and a few can spread to people.
The good news is that prevention is simple and effective when you use the right products for cats.
Common Parasites in Cats
| Parasite | Signs | How cats get it |
|---|---|---|
| Fleas | Scratching, overgrooming, flea dirt, hair loss | Other pets, people, the environment |
| Tapeworms | Rice-like segments near the rear or in stool | Swallowing fleas while grooming, or eating prey |
| Roundworms | Pot belly in kittens, vomiting, worms in stool | From mother’s milk, prey, or contaminated soil |
| Hookworms | Diarrhea, anemia, weight loss | Contaminated soil or skin contact |
| Ear mites | Head shaking, scratching ears, dark coffee-ground debris | Close contact with other animals |
| Ticks | Visible ticks, especially around head and neck | Outdoor time |
| Heartworm | Coughing, breathing trouble, vomiting, sometimes sudden collapse | Mosquito bites |
Why Indoor Cats Need Protection
Fleas hitch rides on people and dogs. Mosquitoes, which spread heartworm, get indoors easily. And cats who catch the occasional mouse or bug can pick up worms. That’s why many vets recommend year-round prevention even for indoor-only cats.
Prevention
- Use a cat-specific monthly preventive recommended by your vet. Many protect against several parasites at once.
- Never use dog products on cats. Some contain permethrin, which can cause seizures and death in cats.
- Dose by weight and don’t split doses between pets.
- Treat every pet in the home if one has fleas.
- Have a fecal test done at yearly checkups.
- Scoop the litter box daily and keep cats from hunting.
Treatment
Your vet can choose the right dewormer or treatment based on the parasite. Flea infestations need treatment of every pet plus the home: wash bedding in hot water and vacuum often, since flea eggs and pupae can keep hatching for weeks. Over-the-counter dewormers don’t treat every type of worm, so a vet diagnosis helps you use the right one.
Protecting People Too
Some cat parasites, like roundworms and hookworms, can infect people, especially children. Wash hands after scooping litter, cover sandboxes, and keep up with your cat’s prevention. Pregnant people should ask their doctor about toxoplasmosis and avoid scooping litter when possible.
Helpful Products
- Flea combs: Easy way to check for fleas and flea dirt.
- Washable cat beds: Makes hot-water washing simple during a flea problem.
- Litter scoops and disposal systems: Daily scooping helps control parasites.
Frequently Asked Questions
Do indoor cats need flea treatment?
Many vets recommend it, since fleas can come inside on people and other pets.
Can cats get heartworm?
Yes. It’s less common than in dogs, but it can cause serious lung disease, and there’s no approved treatment for cats, so prevention matters.
How do I know if my cat has worms?
Sometimes you’ll see worms or rice-like segments, but often there are no signs. A fecal test at your vet is the best way to know.
Can I use my dog’s flea medicine on my cat?
No. Some dog flea products are toxic to cats.
The Bottom Line
Parasites are common, but they’re also very preventable. Use a cat-safe preventive your vet recommends, keep up with fecal tests, treat all pets if fleas show up, and never use dog products on cats.
Keep reading:
- Flea and Tick Prevention for Dogs and Cats: Types, Safety and Tips
- Common Cat Health Problems: Causes, Signs and When to See a Vet
- Keeping Indoor Cats Happy and Healthy
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