Concerning Cyclospora Outbreak in the U.S. Raises International Health Alert
The concerning outbreak of cyclosporiasis in the United States, also known as “explosive diarrhea,” has prompted international health authorities to issue alerts. So far, more than 6,707 laboratory-confirmed cases have been reported, while an additional 11,500 suspected cases remain under investigation. Authorities have now identified a separate potential route of infection involving Mexico and the United Kingdom.
What Is Known About the Suspected Cyclospora Cases Between Mexico and the United Kingdom?
The United Kingdom has identified at least 48 cases of British tourists infected with the Cyclospora parasite after visiting the popular Mexican tourist destinations of Riviera Maya and Cancún.
The cases were first reported on July 30, 2026, by the UK Health Security Agency (UKHSA), which described the situation as “a significant increase in Cyclospora infections among travelers returning from Mexico.”
The agency urged British travelers to take extra precautions when consuming food and drinking water during international travel to reduce the risk of infection.
“The UKHSA advises all travelers to take precautions when traveling abroad, including maintaining good food and water hygiene, to reduce the risk of infection,” the agency stated, adding that cyclosporiasis is acquired through the consumption of contaminated food, particularly herbs, salads, and soft fruits.
The UKHSA also emphasized that the Cyclospora parasite does not occur naturally in the United Kingdom and that there is no risk of person-to-person transmission.
The 48 confirmed cases among British tourists were identified from a total of 67 travel-related investigations involving travelers who returned between April 30 and July 15, 2026, including 30 cases in England, 10 in Wales, and 27 in Scotland.
According to the investigation, the affected travelers had stayed at various hotels in Riviera Maya and Cancún, where they consumed a variety of foods and beverages as part of all-inclusive vacation packages.
Health Authorities Investigate Hotels Where the Tourists Stayed
Although authorities have not yet determined the source of the infections, Mexico’s Ministry of Health has launched a comprehensive investigation into the hotels involved.
The investigation is being carried out by the Federal Commission for the Protection against Sanitary Risks (COFEPRIS), the National Service for Agri-Food Health, Safety and Quality (SENASICA), and the General Directorate of Epidemiology.
“Regarding the cases of cyclosporiasis reported by the authorities of the United Kingdom, the Ministry of Health informs that the National Focal Point for the International Health Regulations received a communication from the UK authorities concerning the identification of cases of cyclosporiasis in individuals with a history of travel to Quintana Roo.”
Finally, the Ministry of Health recalled that on July 24, the Government of Mexico announced that laboratory analyses conducted by both Mexican and U.S. health authorities had not detected Cyclospora cayetanensis in any of the samples collected by either country.
Source: radioformula
