Toxocariasis - Symptoms of toxocariasis

Many people infected with the roundworm larvae responsible for toxocariasis don't have any symptoms.

Symptoms only tend to develop if you're infected with a high number of larvae, or if your body is particularly sensitive to them.

If there are any symptoms, these are often mild and can include:

• a cough
• a high temperature (fever) of 38ºC (100.4ºF) or above
• stomach pain
• headaches

As well as the symptoms above, signs of a severe infection may include:

• fatigue
• loss of appetite
• weight loss
• skin rashes
• wheezing
• breathing difficulties
• seizures (fits)
• blurred or cloudy vision, usually only affecting one eye
• a very red and painful eye

If one of your eyes is affected by toxocariasis, there is a risk of permanent vision loss. However, prompt treatment can help reduce the chances of this happening.

When to see your GP

You should see your GP as soon as possible if you think you or your child may have toxocariasis.