PODCAST:
July 15, 2026 ~ Chris Renwick and Lloyd Jackson discuss the cyclosporiasis outbreak with Dr. Matthew Sims, Director of Infectious Disease Research at Corewell Health, regarding diagnostic challenges and risks of overtreatment.
MICHIGAN ~ A parasitic outbreak in Michigan ballooned to 3,762 cases Wednesday afternoon, with the Michigan Department of Health and Human Services possibly zeroing in on the source of the outbreak.
Michigan’s chief medical executive, Dr. Natasha Bagdasarian, said that while MDHHS has not officially determined the source of the Cyclosporiasis outbreak, she said that lettuce or salad greens could be the cause. Most of the cases are concentrated in Southeast Michigan.
Cyclosporiasis is commonly spread by food or water contaminated with feces. In recent years, outbreaks have occurred in the U.S. as a result of eating contaminated fresh produce, especially during the summer months. Cyclosporiasis is not known to spread from person to person. Symptoms occur two to 14 days after exposure and may include watery diarrhea, loss of appetite, abdominal cramps, bloating, nausea, and mild fevers.
Individuals experiencing sudden gastrointestinal illness are encouraged to be evaluated by a health care provider. Symptoms of cyclosporiasis can be significantly improved with antibiotic treatment. If untreated, the illness may last for a few days to a month or longer. Providers are urged to consider cyclosporiasis among patients presenting with acute gastrointestinal illness in southeast Michigan.
To help avoid any illness from cyclospora or other harmful bacteria or organisms, public health officials recommend the following:
- Wash all fruits and vegetables thoroughly under running water before eating, cutting or cooking.
- Scrub firm fruits and vegetables, such as melons and cucumbers, with a clean produce brush.
- Cut away any damaged or bruised areas on fruits and vegetables before preparing and eating.
- Refrigerate cut, peeled or cooked fruits and vegetables as soon as possible.
- Cook when you can, since heating food to 158°F or higher kills Cyclospora.
