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Mystery Diarrhea: Small Outbreaks Grow Amidst FDA Probe
19 Aug
Summary
- Untraced cyclosporiasis outbreaks continue to rise nationwide.
- Government officials claim the spread is contained and food is safe.
- The parasite is difficult to trace due to lack of advanced testing.

Untraced outbreaks of the illness cyclosporiasis are continuing to spread across the United States, even as federal officials assert that the nationwide transmission has been effectively contained. While a significant outbreak initially centered in Michigan and linked to contaminated iceberg lettuce has seen a slowdown, smaller outbreaks, originating from unknown food sources, are reportedly on the rise.
Health authorities have stated that the U.S. food supply remains secure and that fresh produce is safe to consume. Despite these assurances, the U.S. Food and Drug Administration (FDA) is actively investigating potential causes for these smaller, untraced outbreaks. The parasitic nature of cyclospora, which is spread by contaminated produce and is difficult to trace with current advanced testing methods, complicates identification and containment efforts.
Cyclosporiasis infections, characterized by severe gastrointestinal distress, have affected people in 40 states this year. Michigan has recorded the highest number of cases and the only two reported deaths associated with the infections. The Centers for Disease Control and Prevention (CDC) is collaborating with health departments nationwide to monitor and analyze the evolving data.