Cyclospora Warning Hits UK Travellers
July alert flags cyclosporiasis risk for international travellers after UK infections linked to holiday exposure
What Changed
Who It Affects
UK travellers are being warned about cyclospora, a food and water-borne infection that can cause severe diarrhoea after holidays abroad.
UK travellers were warned on 2026-07-30 about cyclospora, a parasite-linked infection that can cause severe diarrhoea after overseas travel. The illness, known as cyclosporiasis, is usually not life-threatening for healthy adults, but it can be deeply unpleasant and disruptive, especially if symptoms appear during a trip or shortly after returning home. The warning is particularly relevant for holidaymakers who have eaten fresh produce or consumed food and drink in destinations where water hygiene may be uncertain.
What Cyclospora Is
Cyclospora is a microscopic parasite that infects the intestine and is usually spread through food or water contaminated with human faeces. It is not the same as ordinary traveller’s diarrhoea, and symptoms may last longer or come and go if untreated. Common symptoms include watery diarrhoea, stomach cramps, bloating, nausea, tiredness, loss of appetite and weight loss. Some reports describe the diarrhoea as sudden and severe, which is why travellers should take persistent symptoms seriously rather than dismissing them as a routine holiday stomach upset.
Why Travellers Are Being Warned
The warning issued on 2026-07-30 focuses on international travellers because cyclosporiasis is often linked to exposure abroad and can be diagnosed only after a person returns to the UK. The infection is commonly associated with contaminated fresh foods, particularly items eaten raw, such as salads, berries, herbs and pre-cut fruit. Cooking food thoroughly reduces risk, but washing produce may not remove all contamination if unsafe water has been used. That makes buffet items, raw garnishes and uncooked vegetables more important to assess carefully in higher-risk settings.
Symptoms To Watch For After A Holiday
Travellers should look out for watery diarrhoea that persists, returns after seeming to improve, or is accompanied by cramps, bloating, fatigue or loss of appetite. Symptoms do not always begin immediately, so the connection with a recent holiday can be missed. If you become unwell after returning to the UK, write down where you travelled, when symptoms began, what you ate, and whether anyone else in your party became ill. This information can help a GP or health professional decide whether stool testing for parasites is needed.
Practical Tips
- Tip 1: If you develop persistent or severe diarrhoea after travelling, contact your GP or NHS 111 and clearly mention your destination, travel dates and any high-risk foods you ate, as cyclospora may need specific testing.
- Tip 2: Avoid uncooked foods abroad when hygiene is uncertain, especially salads, fresh herbs, berries, pre-cut fruit and garnishes that may have been washed in unsafe water.
- Tip 3: Drink sealed bottled water where tap water safety is uncertain, and use it for brushing teeth if local advice recommends avoiding tap water.
- Tip 4: Wash hands thoroughly before eating and after using the toilet, and carry alcohol gel, but remember hand gel does not make contaminated food safe.
Mistakes to Avoid
- ✕Mistake 1: Assuming diarrhoea after a holiday is always a short-lived stomach bug, because cyclospora can persist and may require targeted treatment.
- ✕Mistake 2: Taking leftover antibiotics or medication without medical advice, as the wrong treatment may not help and could complicate diagnosis.
- ✕Mistake 3: Forgetting to tell a doctor about recent travel, which can delay stool testing for parasites such as Cyclospora.
- ✕Mistake 4: Relying only on food that looks clean, because contaminated fresh produce can appear normal and still carry infection risk.
Quick Checklist
- Note your destination, accommodation, restaurants and foods eaten if symptoms develop
- Check GOV.UK travel advice before departure and again before returning
- Pack oral rehydration sachets, hand gel and travel insurance details
- Verify whether local tap water is safe for drinking and brushing teeth
- Have NHS 111, your GP and insurer contact details ready
