Parasitic infection spreads across 31 US states; Michigan cases surge past 2,600

A widespread outbreak of the parasitic infection Cyclospora has emerged across the United States, with cases reported in 31 states. Michigan is experiencing a severe outbreak, having recorded 2,640 cases as of Monday, a substantial increase of over 1,000 cases since Friday. This surge includes 44 hospitalizations within the state.

Cyclosporiasis, an intestinal infection caused by the Cyclospora parasite, is generally transmitted through contaminated food or water. Health authorities note that infections typically peak during the spring and summer, with the current outbreak showing rapid spread since May. While Michigan has seen the highest numbers, Ohio has also reported 361 cases since June 1, with 46 individuals requiring hospitalization. Fortunately, no fatalities have been linked to the outbreak to date.

Investigators are focusing on leafy greens, such as lettuce, as potential sources of contamination, although other food items have not been ruled out. Past outbreaks have been associated with fresh produce, including bagged salad mixes and certain herbs. Cyclospora infections are not typically spread directly from person to person. Symptoms, which can include diarrhea, abdominal cramps, nausea, and fatigue, usually appear within days of consuming contaminated food and can persist for weeks or even recur after initial improvement if left untreated. The CDC is continuing to monitor the situation, with data indicating a significant number of additional cases are still under analysis.