The UK Health Security Agency (UKHSA) is reporting a sharp rise in cyclospora cases among travellers returning from Mexico.
The latest data shows that 67 cases have been reported in returning travellers in England (30 cases) Wales and (10 cases) Scotland (27 cases) between 30 April and 15 July 2026; a sharp rise this year when compared to the annual average of 93 cases recorded between 2022 and 2025.
Travel information is available for 52 out of the 67 cases; of these, 48 reported travel to Mexico, with one also reporting travel to the USA. One further case reported travel to the USA only, and one to Kenya.
Dr Philip Veal, Consultant in Travel Health at UKHSA, said:
We have recently detected a rise in Cyclospora infections among travellers returning from Mexico. These infections are caused by a parasite and can affect the stomach and intestines.
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.
If you develop symptoms after returning from travel, such as watery diarrhoea, loss of appetite, weight loss, stomach cramps or pain, bloating, increased wind, nausea, fatigue or other flu-like symptoms, please seek medical attention and inform your healthcare professional of your travel history.
Cyclospora now reported in 45 states, Michigan tops 10,000 cases