The UK Health Security Agency (UKHSA) has reported a sharp rise in Cyclospora infections among travellers returning to the UK. The parasite causes explosive diarrhoea.
Cases on the rise
Between April 30 and July 15, 67 cases were reported across the UK: 30 in England, 27 in Scotland, and 10 in Wales. This marks a significant increase compared to the annual average of 93 cases recorded between 2022 and 2025.
Source and transmission
Contaminated food, particularly herbs, salad, and soft fruit, are common sources of outbreaks. Cyclospora does not naturally occur in the UK, and there is no risk of person-to-person spread, according to UKHSA.
Symptoms and advice
Symptoms include frequent watery diarrhoea, abdominal cramping, bloating, nausea, flatulence, low-grade fever, loss of appetite, and weight loss. Infections are usually mild and most people recover within a few days without treatment. However, severe or prolonged cases may occur in immunocompromised individuals, and antibiotics may be prescribed.
Travel information is available for 52 of the 67 cases, with 48 reporting travel to Mexico. One of those 48 also travelled to the USA.
Dr Philip Veal, consultant in travel health at UKHSA, said: 'Travellers to Mexico and other areas where the infection is more common can reduce their risk by following good food and water hygiene measures, including drinking bottled water and eating thoroughly cooked food, even when staying in high-end all-inclusive resorts. We also advise avoiding certain foods such as fresh uncooked berries and herbs, unpeeled fruit and salad items.'
