A rise in cyclospora infections has been detected in the UK among travellers returning from Mexico, according to figures published today by the UK Health Security Agency (UKHSA).
Between 30 April and 15 July 2026, 67 cases were reported in returning travellers across England (30 cases), Wales (10 cases), and Scotland (27 cases). This marks a sharp increase compared to previous years, which saw an average of 93 cases recorded over an entire year.
Of the reported cases, 48 involved individuals who travelled to Mexico. Some of these travellers stayed at hotels in the Riviera Maya and Cancún regions and consumed various food and drink as part of all-inclusive holiday packages. One case also reported travel to the USA, another to the USA only, and one to Kenya.
Cyclosporiasis infections are caused by a parasite and can lead to symptoms such as watery diarrhoea, vomiting, loss of appetite, and stomach cramps. Dr Philip Veal, Consultant in Travel Health at UKHSA, stated that travellers to Mexico and other areas where the infection is common should follow good food and water hygiene measures. This includes drinking bottled water, eating thoroughly cooked food, and avoiding uncooked berries, herbs, unpeeled fruit, and salad items, even in high-end resorts.