A surge in cases of a parasite causing severe diarrhea has been observed among British individuals. The UK Health Security Agency (UKHSA) has reported a notable increase in cyclospora infections among those who have recently visited Mexico. Cyclospora, a parasite linked to explosive diarrhea, is commonly transmitted through contaminated food items like herbs, salad, and soft fruits.
According to UKHSA, the parasite is not native to the UK, and there is no risk of person-to-person transmission. From April 30 to July 15, a total of 67 cases of cyclospora infection have been documented across the UK. As a precautionary measure, the agency has advised travelers to practice good food and water hygiene while abroad to minimize the chances of infection.
Symptoms of cyclospora infection include watery diarrhea, abdominal cramps, bloating, nausea, flatulence, low-grade fever, loss of appetite, and weight loss. While most infections are mild and resolve within a few days without treatment, individuals with weakened immune systems may experience more severe symptoms and might require antibiotics.
Recent data reveals that out of the 67 reported cases in returning travelers, 30 cases were identified in England, 27 in Scotland, and 10 in Wales. This spike in cases is significantly higher than the average annual count of 93 cases recorded between 2022 and 2025. Among the cases with travel information available, 48 individuals had visited Mexico, with one of them also traveling to the United States.
Ongoing investigations are being conducted around these cases, with UKHSA anticipating a continued increase in travel-related cyclospora infections as more people travel to Mexico during the summer. Travel to the USA, where a widespread outbreak has been reported, could potentially contribute to a rise in cases in the UK.
Dr. Philip Veal, a travel health consultant at UKHSA, highlighted the importance of following proper food and water hygiene practices to reduce the risk of cyclospora infection while traveling. He advised travelers to Mexico and other high-risk areas to drink bottled water, consume thoroughly cooked food, and avoid certain foods like fresh uncooked berries, herbs, unpeeled fruits, and salads.
UKHSA is collaborating with ABTA, the travel association, and Mexican health authorities to investigate the surge in cases further. If individuals develop symptoms such as watery diarrhea, stomach cramps, weight loss, or nausea after traveling, they are urged to seek medical attention and inform healthcare providers about their recent travel history.
