The Explosive Diarrhea Outbreak Has Turned Deadly

Key Points:

• Michigan health officials reported two deaths linked to the state's cyclosporiasis outbreak, marking the first fatalities from the disease in the U.S. this year, with cases documented in 45 states.
• Cyclosporiasis, caused by the parasite Cyclospora cayatenensis, typically causes severe gastrointestinal symptoms but is rarely life-threatening, except in vulnerable populations such as the very young, elderly, or immunocompromised.
• The 2026 outbreak is the worst on record, with Michigan reporting over 11,500 cases and around 200 hospitalizations; the largest outbreak affecting nine states has been linked to contaminated iceberg lettuce from Taylor Farms.
• Despite the recall of implicated lettuce products, at least three other active outbreaks are under investigation, with states like North Carolina reporting case numbers significantly above normal levels.
• Federal officials have confirmed over 6,700 cases nationwide, with 11,000 more pending confirmation, and while the main source for some outbreaks remains unidentified, tainted produce such as parsley or cilantro is suspected in certain regions.