Roundworms in Cats

Think your indoor cat is safe from parasites? Think again. Even indoor cats can be exposed to intestinal parasites like roundworms. In New York State, eleven counties report positive roundworm tests in more than 10% of cats.

How Indoor Cats Can Be Exposed

• Other animals and humans: Pets or family members who spend time outdoors can bring in parasites.
• Insects and rodents: Flies, roaches, and rodents can carry roundworm eggs, which cats may encounter while exploring.
• Soil exposure: Approximately 15% of potting soil contains roundworm eggs—your cat’s curiosity can put them at risk.

Why Roundworms Are a Concern

• Roundworms are prolific: a single worm can produce up to 24,000 eggs per day.
• Human health risk: 40% of immune-compromised people have a pet at home, increasing the potential for parasite transmission.

Protect Your Cat

Regular intestinal parasite testing and deworming are essential—even for indoor cats—to keep both pets and people safe.