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Cyclospora

Find out about cyclospora, including how you get it, where it's found and what the symptoms are.

About this information

This NHS content is written for people in England. Services, entitlements and contact routes may differ in other countries.

Check if you're at risk of cyclospora

You can get a cyclospora infection from drinking unclean water or eating food that has been contaminated, not been cooked thoroughly or washed with clean water.

Cyclospora is a common parasite found in parts of:

  • Central and South America
  • south and southeast Asia
  • the Middle East
  • Africa

You cannot catch it from close contact with someone who has it.

How to avoid cyclospora while travelling

If you're travelling to an area where cyclospora is found, there are things you can do to reduce the chances of getting it.

Do

  • wash your hands with soap and clean water or alcohol hand gel regularly

  • only drink bottled, boiled or purified water

  • only drink pasteurised dairy products such as milk and yoghurt that are sealed

  • only eat food that has been cooked thoroughly

  • only eat fruit you can peel yourself, such as bananas or oranges

  • only have drinks from cans or bottles with intact seals – hot drinks made with boiling water are usually safe

Don't

  • do not eat fruits, salads or raw vegetables that may have been washed in contaminated water

  • do not have ice in your drinks

  • do not drink tap water or use it to clean your teeth

Symptoms of cyclospora

Not everyone with cyclospora gets symptoms. If you do get symptoms, they usually start about a week after getting infected.

Symptoms of cyclospora include:

  • diarrhoea
  • loss of appetite and weight loss
  • stomach cramps
  • bloating and farting
  • tiredness
  • feeling sick
  • muscle aches
  • high temperature (fever)

Ask for an urgent GP appointment or get help from NHS 111 if:

You have diarrhoea and you've recently travelled abroad and:

  • the diarrhoea is severe and has lasted for more than 3 days
  • you have bloody diarrhoea or bleeding from your bottom
  • you have a high temperature (fever)
  • you are dehydrated
  • you have a weakened immune system or other condition

You can call 111 or get help from 111 online .

If you're still abroad, get medical advice where you are as soon as possible.

Treatment for cyclospora

Cyclospora usually gets better on its own within a few days or weeks. People with a weakened immune system may be at higher risk of more severe symptoms. Make sure you have lots of fluids to avoid dehydration.

Sometimes you may be asked to provide a sample of poo (stool sample) so it can be checked for cyclospora.

If your symptoms are severe or do not go away, you may need antibiotics.

Cyclospora

Symptoms

Cyclospora

Causes

Cyclospora

Prevention

Cyclospora

Medical treatments

Diarrhoea is the main symptom of cyclospora. Other symptoms can include loss of appetite, stomach cramps and bloating.

Cyclospora is spread in unclean water and food. It's found in tropical areas, such as parts of South America, Asia, the Middle East and Africa.

You can lower your chances of getting cyclospora while travelling by washing your hands and making sure you do not eat or drink unclean water or food.

Cyclospora often gets better in a few days or weeks without treatment. If it’s severe or does not go away, you may need antibiotics.

Content supplied by the NHS website

Content supplied by the NHS website, refreshed 19 August 2026. View the original NHS article ↗

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