You may want to be extra cautious with your fresh fruit and veggie platter this holiday weekend: An explosive diarrhea-causing parasite is behind a surge of summer food poisoning cases right before Independence Day.
Cyclosporiasis, a stomach-churning illness caused by a parasite often found on produce, has sickened hundreds across more than 17 U.S. states since May 1, according to the Centers for Disease Control and Prevention (CDC) and state health data. One state, Michigan, is contending with a cluster of infections that has already more than tripled its total case count compared with 2025.
While state health authorities, the CDC and the Food and Drug Administration (FDA) are working to determine a common thread among the illnesses, a singularly related outbreak hasn't been identified. Instead, the cases thus far appear to be part of a seasonal surge, though officials are searching for a potential throughline.



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