The UK Health Security Agency (UKHSA) has identified a sharp increase in cyclospora infections among individuals returning from Mexico. New data, published today, 30 July 2026, shows 67 cases reported in England (30), Wales (10), and Scotland (27) between 30 April and 15 July 2026.
This figure represents a notable rise compared to the annual average of 93 cases recorded between 2022 and 2025. Of the 52 cases for which travel information is available, 48 reported travel to Mexico, with one also visiting the USA. One case reported travel solely to the USA, and another to Kenya.
Those who travelled to Mexico reported stays at various hotels in the Riviera Maya and Cancún regions, consuming diverse food and drink as part of all-inclusive packages. Cyclospora is a parasite that causes symptoms such as watery diarrhoea, abdominal cramping, and nausea, and is acquired through contaminated food.
Dr Philip Veal, Consultant in Travel Health at UKHSA, advised travellers to Mexico and other common infection areas to follow good food and water hygiene measures, including drinking bottled water and eating thoroughly cooked food. He also recommended avoiding uncooked berries, herbs, unpeeled fruit, and salad items.
The UKHSA is working with ABTA and Mexican public health authorities to investigate the increase in cases. They also anticipate a continued rise in travel-associated cases due to increased summer travel to Mexico and a potential increase linked to a widespread outbreak in the USA.