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Worm infection via intermediate hosts

Many people know that pets can infect each other with worms. But did you know that worms can also be transmitted via intermediate hosts? Intermediate hosts are animals that temporarily carry worms and contribute to the spread of parasites. In this blog, we explain which intermediate hosts play a role in worm infections and how you can protect your pet against them.

Which worms use intermediate hosts?
Several types of worms in dogs and cats require an intermediate host to complete their life cycle. The main ones are:

  • Tapeworm
    The tapeworm species Dipylidium caninum is transmitted via fleas. Dogs and cats can become infected by swallowing an infected flea. The fox tapeworm and dog tapeworm use rodents and grazing animals as intermediate hosts. When dogs or cats eat these infected animals, they become infected themselves.
     
  • French heartworm
    The larvae of the French heartworm are transmitted through slugs and frogs. Dogs and cats become infected by eating an infected slug or frog, or indirectly through contaminated water.
     
  • Coccidia: Toxoplasma
    Cats become infected with Toxoplasma by eating infected rodents or raw meat. The cat itself does not become ill. Dogs and humans can become infected through cat feces or undercooked meat.

The infection
Worm infections usually occur when a dog or cat eats the intermediate host. Pets that hunt are especially at risk of infection through rodents, birds, and other small animals. A dog or cat may also swallow an infected flea, often while licking or biting its fur.
Feces from an intermediate host, or slime in the case of slugs, can also lead to infection. When a pet comes into contact with or eats this, infection can occur.

If a dog or cat becomes infected via an intermediate host, worms can cause serious health problems. Symptoms vary depending on the type of worm and can include diarrhea, weight loss, breathing problems, and heart failure.


How can you prevent infection via intermediate hosts?
To reduce the risk of worm infections through intermediate hosts, there are some important measures you can take.

  • Flea prevention
    Use effective flea treatments year-round to prevent worm infections.
    Prevent contact with intermediate hosts
    Try to prevent your pet from eating slugs, frogs, rodents, or birds. If this is not possible due to your pet’s lifestyle, be aware of the increased infection risk.
  • Good hygiene
    Clean your pet’s food and water bowls regularly. Remove your dog or cat’s feces promptly to prevent contamination.
  • Regular fecal testing
    Have your pet’s feces tested regularly (4 times per year). This helps detect infections early, even when preventive measures are in place.


Do you have any further questions? Please contact us. Our enthusiastic team will be happy to help!

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