The U.S. Centers for Disease Control and Prevention (CDC) is investigating a multistate cyclosporiasis outbreak that has infected more than 400 people across Michigan, Ohio, West Virginia, and Kentucky. According to the CDC, the surge in cases began in May, with specific illnesses linked to the current outbreak reported on or after June 22, 2026.
CDC and FDA Trace Contaminated Food Sources
Federal investigators haven’t confirmed a specific food source yet. The CDC and the U.S. Food and Drug Administration (FDA) are currently reviewing patient data and food histories to find the common link. Public health officials are interviewing sick individuals to determine exactly what they ate before symptoms appeared.
This process relies on demographic data—including age, race, and ethnicity—to spot patterns. Because cyclosporiasis can take weeks to diagnose, the CDC warns that the official count of 400 cases is likely an underestimate. Many people recover without medical intervention and never get tested, leaving them out of the official tally.
Did you know?
Recognizing Cyclosporiasis Symptoms and Risks
Symptoms typically appear about one week after infection, though the window can range from two days to two weeks or more. According to the CDC, these symptoms can persist for several days, a full month, or even longer if left untreated.
While the infection is generally not life-threatening, the CDC notes that some patients become severely ill and require hospitalization. Health agencies urge anyone experiencing these symptoms to contact a healthcare provider immediately.
How to Protect Yourself
- Stay updated on official food recalls and outbreak alerts from the FDA.
- Research which produce items are historically linked to Cyclospora.
Pro Tip: If you are contacted by state health officials, provide a detailed list of everything you ate during the two weeks before you got sick. This specific window is critical for investigators to trace the contaminated batch of food.
Guidelines for Healthcare Providers
The CDC requires healthcare providers to report all confirmed cyclosporiasis cases to their local health departments.
Providers are encouraged to use the “Clinical Care of Cyclosporiasis” guidelines for patient management and treatment protocols to ensure rapid recovery and accurate data collection.
Cyclosporiasis Outbreak FAQ
Which states are affected by the current outbreak?
Confirmed cases have been identified in Michigan, Ohio, West Virginia, and Kentucky, though the CDC suggests the outbreak may extend beyond these four states.
How many people are sick?
As of July 13, more than 400 people were reported infected, but officials believe the true number is higher.
When did the outbreak start?
The CDC noted a rise in cases starting in May, with specific outbreak-linked illnesses appearing on or after June 22, 2026.
Is cyclosporiasis dangerous?
It is generally not life-threatening, but according to the CDC, severe cases can lead to hospitalization.
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