U.S. Centers for Disease Control and Prevention (CDC) officials said a cyclosporiasis outbreak linked to shredded iceberg lettuce has expanded to nine states [1].

This expansion indicates a widening geographic footprint for the contamination, posing a broader risk to consumers of pre-cut produce across the Midwest and East Coast.

The latest update from federal health officials confirms that four new states were added in the most recent expansion [2]. Among the affected regions are Pennsylvania, Oklahoma, and several other Midwest states [3].

Health officials said the source of the outbreak is the Cyclospora parasite, which contaminated shredded iceberg lettuce [4]. The parasite causes cyclosporiasis, an intestinal illness that can lead to prolonged gastrointestinal distress.

CDC officials said they continue to monitor the spread as they work to identify the specific source of the contaminated lettuce. The agency is coordinating with state health departments to track new cases and prevent further infections, a process that often involves tracing produce back to the farm or processing facility.

Consumers are encouraged to remain vigilant about the sources of their produce. While the CDC has not yet issued a specific brand recall in this latest update, the link to shredded iceberg lettuce remains the primary focus of the investigation [4].

A cyclosporiasis outbreak linked to shredded iceberg lettuce has expanded to nine states.

The expansion of the outbreak to nine states suggests that the contaminated lettuce was distributed through a wide supply chain, likely from a large-scale processor. Because shredded produce is often sold in bulk to restaurants and grocery stores, the CDC's focus on a specific product type helps narrow the search for the point of contamination, though it increases the number of people potentially exposed.