Cyclosporiasis Outbreak Surges Across U.S.; Michigan Officials Suspect Lettuce

A widespread outbreak of cyclosporiasis, a parasitic intestinal illness causing severe diarrhea, has surged across the United States, with Michigan reporting the highest number of cases at over 2,600. State health officials identified lettuce and salad greens as the likely culprit based on early investigations, though no specific supplier has been named. Consequently, authorities have advised consumers to avoid prepackaged salads and instead purchase whole heads of lettuce, discarding outer layers and washing the remainder thoroughly. Cooking produce is also recommended to kill the parasite.

The Centers for Disease Control and Prevention (CDC) has confirmed hundreds of cases across more than 30 states, with national surveillance data suggesting this year’s count may surpass the previous record set in 2019. While some states report sporadic clusters, health experts note that cases are rising faster than in previous years, potentially linked to improved testing and climate factors. Although the illness is treatable with antibiotics, it can cause hospitalization, particularly among vulnerable populations. Major food chains, including Taco Bell, have taken precautionary measures by temporarily removing certain ingredients from menus.