UK Cyclospora Cases Jump to 67 as Mexico Holiday Warning Issued

The UK Health Security Agency has warned holidaymakers about a sharp rise in cyclospora infections, with 67 cases reported between 30 April and 15 July 2026. The parasite, which causes severe diarrhoea, has been linked primarily to travel to Mexico, particularly stays in Riviera Maya and Cancún resorts. The outbreak coincides with a larger crisis in the US, where over 18,000 people across 45 states have been infected.

How many UK cases and where are they from

England recorded 30 cases, Scotland 27, and Wales 10 between 30 April and 15 July 2026. Of 52 cases with travel information available, 48 reported travel to Mexico. One case involved travel to both Mexico and the USA, one to the USA only, and one to Kenya. The 67 cases represent a sharp rise compared to the annual average of 93 cases recorded between 2022 and 2025.

What are the symptoms and how does infection happen

Symptoms typically appear around one week after consuming contaminated food or water and include watery diarrhoea, abdominal cramping, bloating, nausea, fever, and weight loss. The parasite spreads through contaminated fresh produce, particularly soft or unpeeled fruit, salad leaves, and herbs such as coriander or basil. Cyclospora does not naturally occur in the UK and cannot spread from person to person through everyday contact.

Where the infection comes from in Mexico resorts

Travellers reported staying at a range of different hotels in Riviera Maya and Cancún and consuming varied food and drink as part of all-inclusive holiday packages. The UK Health Security Agency said investigations are ongoing to identify the specific source of contamination. The agency anticipates a continued rise in travel-associated cases linked to increased summer travel to Mexico.

How to protect yourself while travelling

Travellers should drink bottled water and eat thoroughly cooked food, even at high-end all-inclusive resorts. Avoid fresh uncooked berries, herbs, unpeeled fruit, and salad items. For most people, cyclosporiasis is unpleasant but self-limiting, resolving within days to weeks. However, people with weakened immune systems, including those living with HIV, face greater risk of more severe or prolonged illness. Antibiotics can be prescribed for severe or lingering cases.

Final Thoughts

UK travellers to Mexico face a genuine health risk this summer. The 67 cases reported in just 2.5 months far exceed the typical annual pace, making precautions essential for anyone planning holidays to Riviera Maya or Cancún.

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