Boots WebMD Partners in Health
Return To Boots

Roundworm

Roundworms are common parasites in dogs and cats.

As well as making your pet unwell, the worms are a threat to humans, too.

An infected pet can contaminate soil, sand or water with tiny eggs.

Children may ingest the eggs by putting dirty fingers in their mouths.

Infection can also come from unwashed vegetables from the garden or not washing hands thoroughly after gardening in areas where pets are allowed.

In rare cases, toxocariasis from the worms' larvae can cause blindness and other tissue damage.

Ask your vet about regular deworming. Roundworm infection from parks and gardens can also come from fox poo.

It is possible for people to be infected with roundworms and not notice any symptoms before the parasites die off.

Accurate figures are difficult to compile for roundworm infections, but the NHS says there are around 80 cases reported a year in England, Wales and Northern Ireland. Roundworm infections are much more common in tropical and sub-tropical areas of the world and most cases in the UK are contracted abroad, either by travellers or migrants.

If roundworm infection is suspected, a stool (poo) sample may be taken to look for worms or eggs, or a person may notice them after going to the toilet before flushing.

Roundworms can grow up to 30-35cm long.

Medication may be recommended to kill off the parasites in the body.

Roundworm prevention

The key to preventing roundworm infection is good handwashing and hygiene, and avoiding unnecessary contact with animal poo. Take special care with hygiene measures in parts of the world where roundworm is common and local sanitation is poor.

Teach children about leaving animal poo alone, and cover sandpits when they are not in use to stop cats using them as a litter tray.

Food grown in gardens with cats and dogs needs to be washed carefully to remove any parasites.

WebMD Medical Reference

Medically Reviewed by Dr Sheena Meredith on October 30, 2015

Stay informed

Sign up for BootsWebMD's free newsletters.
Sign Up Now!

Popular slideshows & tools on BootsWebMD

woman blowing nose
How to tell the difference
smiling baby
Causes and remedies
bowl of soup
Small changes that lead to weight loss
boy looking at broccoli
Simple tips for feeding fussy eaters
cold sore
How to cope with cold sores
boy coughing
Treatments for cold and fever
bain illustration
Best foods for your brain
bucket with cleaning supplies in it
Cleaning for a healthy home
avacado on whole wheat crackers
Plenty to choose from
african american woman wiping sweat from forehead
Tips to stay dry