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Your cat stays indoors, sleeps on clean furniture, and eats food from a spotless bowl—so how could they possibly get worms?

The truth is that cats do not need to roam through dirty streets to pick up parasites. Worm eggs can be microscopic, fleas can enter the home unnoticed, and mosquitoes do not stop at the front door. Even a carefully protected indoor cat may still be exposed.

Understanding how cats get worms can help you recognize the risks, notice warning signs earlier, and take practical steps to keep your cat healthy.

What Types of Worms Can Cats Get?

The word “worms” covers several different parasites. The most common types affecting cats include:

• Roundworms, which live in the intestines and are especially common in kittens
• Tapeworms, often connected to fleas or infected prey
• Hookworms, which attach to the intestinal lining and feed on blood
• Lungworms, which can affect a cat’s respiratory system
• Heartworms, which are transmitted by mosquitoes and mainly damage the lungs and nearby blood vessels in cats

Each parasite has a different life cycle. That means cats can become infected in several surprisingly ordinary ways.

1. Swallowing an Infected Flea

One of the most common ways cats get tapeworms is by swallowing a flea.

When a cat feels an itchy flea and begins grooming, the cat may accidentally ingest it. If that flea is carrying tapeworm larvae, the larvae can develop into adult tapeworms inside the cat’s intestines.

This is why treating the worms without controlling fleas may not solve the problem for long. A cat can become infected again if fleas remain in the home, bedding, carpets, or on other pets.

You may notice small tapeworm segments around your cat’s rear, in the bedding, or near fresh stool. They are often described as looking like white grains of rice.

2. Contact With Contaminated Feces or Soil

Roundworm and hookworm eggs or larvae can be present in soil, litter, shared outdoor spaces, and areas contaminated by infected animal feces.

A cat does not necessarily have to eat feces directly. Parasite eggs may stick to paws or fur and then be swallowed during grooming. Cats may also encounter contaminated material in a shared litter box, garden, shelter, boarding facility, or multi-cat household.

Because many parasite eggs are too small to see, a clean-looking environment is not always parasite-free.

3. Hunting and Eating Infected Prey

Cats that hunt mice, birds, lizards, insects, or other small animals have a greater chance of encountering parasites.

Rodents can carry roundworm larvae, while prey animals may also transmit certain tapeworms or other parasites. Some stomach worms can be acquired when a cat eats infected insects such as cockroaches or crickets.

Even when a cat does not eat the entire animal, biting, chewing, or consuming part of infected prey may be enough to create a risk.

4. Passing From a Mother Cat to Her Kittens

Kittens may become infected with roundworms through their mother’s milk.

This is one reason worms are so common in young kittens, including kittens that have never been outdoors. Their small bodies are also more vulnerable to the effects of parasites, such as poor growth, diarrhea, dehydration, anemia, or a swollen-looking abdomen.

Routine veterinary care and an appropriate deworming schedule are especially important during the first months of a kitten’s life.

5. Mosquito Bites

Heartworms are different from intestinal worms. Cats get heartworms when an infected mosquito bites them and deposits heartworm larvae into the bloodstream.

Indoor cats are not completely protected because mosquitoes can enter through doors, windows, damaged screens, and small openings.

Heartworm disease can be particularly serious in cats. Even a small number of worms may cause significant inflammation and breathing problems, and cats do not have the same heartworm treatment options available to dogs. Prevention is therefore especially important.

6. Eating Raw or Undercooked Meat

Some parasites can be transmitted when cats eat raw meat or tissues containing infective parasite stages.

A raw diet may appear fresh and carefully prepared but can still carry biological risks that are impossible to detect by sight or smell. Ask your veterinarian about a nutritionally complete diet and whether your cat’s food choices create additional parasite risks.

Can Indoor Cats Get Worms?

Yes. Indoor cats can still get worms.

They may swallow an infected flea, be bitten by a mosquito, encounter another infected pet, or come into contact with parasite material carried into the home. Soil, fecal particles, and flea eggs may also enter on shoes, clothing, pet carriers, or recently adopted animals.

An indoor lifestyle can reduce certain risks, especially hunting and contact with outdoor feces, but it does not make a cat completely immune.

What Are the Signs of Worms in Cats?

Some infected cats look completely normal, particularly during the early stages. When symptoms do occur, they can vary depending on the parasite and the severity of the infection.

Possible warning signs include:

• Worms or rice-like segments in the stool or around the anus
• Vomiting or diarrhea
• A swollen or pot-bellied appearance
• Weight loss despite a normal appetite
• Reduced appetite
• A dull or rough coat
• Scooting or licking around the rear
• Pale gums
• Weakness or poor growth in kittens
• Coughing, gagging, or difficulty breathing

These symptoms can also be caused by many other health conditions. Seeing one symptom does not confirm that your cat has worms, and not seeing worms in the stool does not rule them out.

What Should You Do If You Think Your Cat Has Worms?

Contact your veterinarian rather than choosing a dewormer based only on appearance.

Different medications target different parasites, and the correct treatment depends on the type of worm, your cat’s weight, age, health, and exposure history. Products intended for dogs or people may be inappropriate or unsafe for cats.

Your veterinarian may request a fresh stool sample for examination. However, certain parasites—especially some tapeworm infections—may not always be detected during a routine stool test, so tell the veterinarian about anything unusual you have seen around your cat’s stool, bedding, or rear.

Taking a clear photograph of any visible worm or segment can also be helpful.

Treatment may need to include more than a deworming medication. For example, a cat with flea-related tapeworms will also need effective flea control to reduce the chance of reinfection.

When Is It an Emergency?

Arrange prompt veterinary care if your cat is a young kitten or shows signs such as:

• Repeated vomiting or severe diarrhea
• Blood in the stool
• Pale or white-looking gums
• Significant weakness
• Rapid weight loss
• A painful or severely swollen abdomen
• Labored breathing, collapse, or sudden distress

Parasites can cause blood loss, dehydration, nutritional problems, and respiratory complications. These effects may become serious more quickly in kittens, elderly cats, and cats with existing health conditions.

How Can You Help Prevent Worms?

Prevention begins with reducing the routes parasites use to reach your cat.

Keep your cat on a veterinarian-recommended parasite prevention program that matches your location and lifestyle. Maintain reliable flea control for every pet in the household, clean litter boxes frequently, and wash your hands after handling animal waste.

Keeping cats indoors can reduce exposure to prey and contaminated soil. Avoid allowing them to hunt or eat rodents, insects, raw meat, or animal remains. New cats should receive a veterinary examination and appropriate parasite testing before being introduced closely to other pets.

Regular fecal examinations are also valuable because a cat can carry intestinal parasites without showing obvious symptoms.

Frequently Asked Questions

Can I get worms from my cat?

Some feline parasites have the potential to infect people, although the route depends on the parasite. Good hygiene, regular veterinary care, prompt disposal of feces, and consistent flea control help reduce the risk.

Wash your hands after cleaning the litter box, gardening, handling soil, or touching animal waste. Extra care is important for young children, pregnant people, and anyone with a weakened immune system.

Can I see cat worms with the naked eye?

Sometimes. Roundworms may look like pale strands of spaghetti, while tapeworm segments may resemble grains of rice. Hookworms and many parasite eggs are usually too small to see without laboratory testing.

Will worms go away without treatment?

You should not assume that they will. Some infections can continue contaminating the environment, affect your cat’s health, or spread to other animals. Proper diagnosis and treatment provide a safer path than waiting for visible symptoms.

How often should cats be checked for worms?

The appropriate schedule depends on age, health, outdoor access, hunting behavior, travel, and contact with other animals. Kittens generally require more frequent testing and parasite control than healthy adult cats. Your veterinarian can recommend a schedule based on your cat’s individual risk.

Final Thoughts

Cats get worms through more routes than many owners realize. A flea swallowed during grooming, microscopic eggs on a paw, an infected mouse, a mother’s milk, or a single mosquito bite may be enough.

The good news is that most intestinal worm infections can be managed when they are identified and treated correctly. Consistent flea control, regular veterinary testing, clean litter habits, and suitable preventive medication can greatly reduce your cat’s risk.

You may not be able to see every parasite—but you can make it much harder for them to reach your cat.

This article is for general educational purposes and is not a substitute for veterinary diagnosis or treatment.