The U.S. Centers for Disease Control and Prevention (CDC) has confirmed 1,645 cases of cyclosporiasis, a foodborne parasite infection, with an additional 5,100 possible cases under investigation across 34 states. Michigan, the hardest-hit state, alone reports 3,309 cases, far exceeding its typical annual range of 40 to 50.
What Is Cyclosporiasis and How Does It Spread?
Cyclosporiasis is an intestinal infection caused by consuming food or water contaminated with the Cyclospora parasite, often found in raw fruits and vegetables. Symptoms include diarrhea, nausea, and severe gastrointestinal distress, with higher risks for children, older adults, and immunocompromised individuals. While rarely life-threatening, untreated cases can persist for weeks, potentially leading to hospitalization due to dehydration.
FDA Traceback Investigations and Economic Impact
The Food and Drug Administration (FDA) is conducting traceback investigations on multiple produce items, including lettuce identified by Michigan health officials as a potential source. No specific grower, supplier, or produce type has been confirmed yet. Past outbreaks have been linked to bagged salad mixes, fresh cilantro, basil, raspberries, snow peas, and green onions.
Delays in reporting mean case counts are expected to rise. Symptoms typically appear between two days and two weeks after exposure, with confirmation taking up to six weeks. The CDC notes that cyclosporiasis cases usually peak from May 1 through August 31.
Treatment and Public Health Response
The CDC recommends treating cyclosporiasis with the antibiotic trimethoprim-sulfamethoxazole (Bactrim), taken twice daily for 7–10 days. People with HIV may require extended treatment. Prevention measures include thorough handwashing and scrubbing firm produce with a clean brush.
Funding cuts last July halted FoodNet’s tracking of Cyclospora and other pathogens, though national surveillance continues. Participating states still report cases to the CDC, ensuring data consistency with past outbreaks.
