The U.S. Centers for Disease Control and Prevention and the Food and Drug Administration have linked a multistate cyclosporiasis outbreak to recalled shredded iceberg lettuce.
This contamination poses a significant public health risk because the parasite can spread rapidly through the commercial food supply chain, affecting thousands of consumers across different regions.
Health officials said the outbreak has expanded to nine states [1]. While some reports suggest the parasite has reached as many as 41 states [4], the CDC has specifically confirmed the expansion to nine [1]. The outbreak has caused thousands of people across the United States to become sick with cyclosporiasis [3].
In addition to the multistate totals, officials said dozens of cases occurred specifically in the St. Louis, Missouri area [2]. The illness is caused by the Cyclospora parasite, which contaminated the supply of shredded iceberg lettuce [2].
Cyclosporiasis typically manifests as gastrointestinal distress. Because the parasite is hardy and can survive various processing steps, it often persists in produce that is shredded and packaged for retail sale. The CDC and FDA continue to monitor the supply chain to prevent further infections.
Consumers are advised to check their produce against recall lists provided by the FDA. Health agencies are working to trace the origin of the contaminated lettuce to determine where the parasite first entered the production cycle.
“The outbreak has expanded to nine states”
The disparity in reported affected states—ranging from nine to 41—suggests a significant gap between confirmed laboratory cases and suspected regional spikes. This indicates that the contaminated lettuce was distributed through wide-reaching commercial channels, making the outbreak difficult to contain until the specific source farm or processing plant is identified.
