Toxocara cati and Toxocara Canis 

Roundworms from dogs and cats are responsible for an infection in people called toxocariasis.    This happens when roundworm eggs in dogs and cats poo are swallowed this can infect organs such as the liver, lungs, eyes or brain and the sy mpto ms may be severe: fatigue, loss of appetite, breathing problems, and blurred or cloudy vision with a risk of permanent vision loss are possible. However, often there are no symptoms and the parasite dies within a few months but some people may experience mild symptoms such as a cough, headache or stomach pain.  Young children are most at risk especially those aged between 2 and 4  as they are more likely to come into contact with contaminated soil and put their hands in their mouths. A survey found that 15-25% of sandpits tested were found to be infected. Public Health England state that 2-10% of people in the western world have positive antibodies for toxocara.



Infection is from eggs passed through dogs and cats poo and into the ground then it takes only small particles to reach peoples mouths for them to get infected. Roundworm eggs are sticky which may make it easier for them to attach themselves to hands, food and even toys. Poop scooping is essential and should be done as soon as possible as fresh poo is not infectious. It takes a few weeks for the eggs to become dangerous. Worming cats and dogs at least every three months is essential.


Prevention through worming and awareness is key 


  • Worm with a suitable  dog wormer or  cat wormer  regularly.
  • Explain to children the health problems that may be caused by puppies, kittens, and dogs and cats.
  • The eggs that cause Toxocara can live in soil or sand so poop scoop and bin it.
  • Be quick fresh dog and cat poo poses less danger as it takes a few weeks for them to become infectious.
  • Keep sandpits covered and pets away.
  • Clean and vacuum around your dogs bed and where they hang out.
  • Puppies are born with worms- using  Panacur liquid for dogs appropriately on a pregnant dog can reduce or eliminate this.

Good hygiene is good prevention

  • Educate children to wash their hands after playing with dogs and cats.
  • Try to stop children eating dirt and soil.
  • Wash food that has been in contact with soil.
  • Keep an eye out for dog and cat poo in play areas and remove kids if unacceptable.

By Ben Watson Amtra SQP updated 28/09/2021