U.K. health officials report a sharp increase in cyclosporiasis cases among travelers who have recently returned from Mexico, according to multiple outlets. Cyclosporiasis is an intestinal illness caused by the parasite Cyclospora, typically associated with contaminated food or water. The reported rise is focused on a subset of travelers with recent travel to Mexico, prompting public-health guidance for clinicians and travelers. The announcements emphasize awareness of symptoms and the importance of seeking medical advice if people develop persistent gastrointestinal illness after travel. While the coverage highlights the geographic link to Mexico travel, it does not indicate that local transmission is driving the cases. Officials’ messaging is aimed at improving detection and ensuring appropriate testing and treatment. Overall, the reports describe the situation as a notable uptick in reported infections in the U.K., tied to travel history, and urge attention to symptoms following trips to Mexico.