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Worms as a zoonosis: transmissible to humans

Worms in dogs and cats are not only a problem for the animals themselves but can also pose a risk to humans. Some worms are zoonotic, meaning they can be transmitted from animals to humans. This can cause serious health issues, especially in children, the elderly, and people with weakened immune systems. In this blog, we explain which worms are dangerous, what the risks are, and how to prevent infection.

Which worms are transmissible to humans?
Several types of worms found in dogs and cats can also infect humans. Here are the most important ones.

  • Roundworm
    Humans can become infected by ingesting microscopic worm eggs. This happens through contact with contaminated soil, sandboxes, or animals. In humans, the larvae can migrate through the body and damage organs or even the eyes.
  • Tapeworm
    Dipylidium caninum is transmitted through infected fleas. People can accidentally ingest a flea and become infected. Echinococcus multilocularis (fox tapeworm) and Echinococcus granulosus (dog tapeworm) can cause serious organ damage by forming cysts in the liver, lungs, and brain.
  • Hookworm
    Humans can be infected through direct skin contact with contaminated soil, for example, when walking barefoot. The larvae can penetrate the skin and cause irritation.
  • Whipworm
    Although human infections are rare, eggs can be transmitted through contaminated soil or dog feces. Fox and dog tapeworms are found only in dogs.
  • Giardia
    Giardia is a parasite that causes diarrhea and gastrointestinal issues. While transmission from dog or cat to human is rare, infection via contaminated water or feces is possible.

How can you prevent infection?
Fortunately, with good hygiene and preventive measures, you can significantly reduce the risk of infection. Here are some tips:

  • Good hygiene
    Always wash your hands after contact with animals or soil, especially before eating.
  • Clean up pet feces
    Pick up dog poop immediately and clean the litter box regularly. Prevent dogs and cats from defecating in high-risk areas such as sandboxes.
  • Regular fecal testing
    Have your dog or cat’s feces tested regularly (4x per year) for worms. Only deworm when testing shows it is necessary to prevent resistance.
  • Prevent fleas
    Treat dogs and cats preventively against fleas to reduce the risk of tapeworm infections.
  • Avoid contact with wild animals
    Wild animals like foxes and rodents can carry dangerous worms. Prevent contact with their feces or carcasses.
    If control is not possible, take extra precautions due to the increased risk of infection.
  • Keep the environment clean
    Clean food bowls, water dishes, and your pet’s sleeping area regularly, and wash your hands afterwards.


We can conclude that worms not only affect your pet’s health but can also pose a risk to humans. By maintaining good hygiene and conducting regular fecal tests, you can minimize the risk of (re)infection. Want to know if your pet is worm-free? Then have a fecal test done.
If you have any further questions, feel free to contact us!

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