Can Your Pet’s Worms Affect Your Family?

Understanding how intestinal parasites spread can help you care for your dog or cat—and reduce your family’s exposure.

Cleaning up after your pet is about more than keeping your yard tidy. Some intestinal worms carried by dogs and cats can also infect people. Their eggs or larvae may enter the environment through pet waste, creating opportunities for exposure in gardens, playgrounds and other shared outdoor spaces.

The risk depends on the parasite and how contact occurs. Learning the main transmission routes makes everyday prevention easier.

Can People Get Worms from Dogs and Cats?

Yes. Certain roundworms, hookworms and tapeworms associated with dogs and cats can infect humans. However, each parasite spreads differently. People may become infected by accidentally swallowing parasite eggs, swallowing an infected flea, or exposing bare skin to contaminated soil.

Simply being near an infected pet does not mean you will become infected. Understanding the specific route of transmission is what helps you reduce the risk.

Roundworms: A Risk Hidden in Contaminated Soil

Dogs and cats infected with roundworms can pass microscopic eggs in their stool. People can become infected when they accidentally swallow these eggs through dirty hands, contaminated food or soil.

Children may be particularly vulnerable because they often play on the ground and put their hands in their mouths.

Roundworm eggs generally need two to four weeks in the environment to become infectious. Once developed, they can survive for months or even years under suitable conditions. Removing pet waste promptly helps prevent eggs from building up in outdoor areas.

Why Early Care Matters for Puppies and Kittens

Young pets deserve particular attention when it comes to parasite care. Puppies can acquire certain roundworms before birth or through nursing, and kittens can also acquire roundworms through their mother’s milk.

Rather than waiting for visible worms or signs of illness, ask your veterinarian about appropriate testing and treatment for your young pet.

Tapeworms: Understanding the Flea Connection

One common tapeworm in dogs and cats, Dipylidium caninum, relies on fleas to complete its life cycle. Pets become infected when they swallow an infected flea, often while grooming.

People can acquire this tapeworm in the same way—by accidentally swallowing an infected flea. Human infections are uncommon, and most reported cases involve children.

You may notice small tapeworm segments resembling rice grains near your pet’s bottom, in their stool or on bedding. Some infected pets otherwise appear healthy.

Because fleas are part of the transmission cycle, effective flea control is an essential part of preventing this type of tapeworm.

Can Other Tapeworms Infect People?

Certain other tapeworms spread differently. People can develop echinococcosis after accidentally swallowing Echinococcus eggs shed in the feces of infected dogs.

Exposure can occur through contaminated hands, food, water or soil. The relevance of this parasite depends on location and a dog’s activities, including access to infected livestock tissues. Your veterinarian can help assess your pet’s risk.

Hookworms: When Bare Skin Meets Contaminated Ground

Hookworm eggs passed in animal waste can hatch and develop into infective larvae in soil or sand. Some dog and cat hookworm larvae can penetrate human skin.

Walking barefoot or sitting with exposed skin on contaminated ground can allow infection. This may cause an intensely itchy rash with raised, winding red tracks.

Wearing shoes, avoiding bare-skin contact with potentially contaminated soil and promptly collecting pet waste can help reduce exposure.

What About Whipworms?

Whipworms can affect dogs that swallow infective eggs from contaminated environments. Infected dogs may develop diarrhea, weight loss or dehydration, although some show few outward signs.

Whipworm infections are uncommon in domestic cats in North America.

The Companion Animal Parasite Council does not currently consider the canine whipworm, Trichuris vulpis, an established zoonotic parasite because reports of human infection lack sufficient validation. Even so, an infected dog still needs appropriate veterinary care.

Everyday Habits That Help Reduce Exposure

A few consistent habits can support a cleaner environment for pets and people:

• Collect dog waste promptly and clean litter boxes regularly.

• Wash your hands after handling pet waste, gardening or playing outdoors.

• Help children wash their hands before eating.

• Keep children away from areas contaminated with animal feces.

• Wear shoes outdoors where soil or sand may be contaminated.

• Maintain effective flea control for household pets.

• Arrange veterinary parasite testing and treatment appropriate for your pet.

These steps address the main routes through which common pet-associated worms reach people.

Build a Parasite Care Plan with Your Veterinarian

Parasite care is most useful when it matches your pet’s needs. Talk with your veterinarian about testing, treatment and ongoing prevention, especially for young pets and animals that spend time outdoors.

Combining veterinary care with prompt waste removal and good hand hygiene can help reduce environmental contamination and your family’s exposure to parasites.