United States ends parasite outbreak linked to lettuce

Summary of the lettuce-related outbreak

Developments of the Cyclospora outbreak

The U.S. Centers for Disease Control and Prevention (CDC) recently announced that the Cyclospora outbreak linked to iceberg lettuce has ended. According to the agency, the number of new cases related to the outbreak has dropped significantly, and the contaminated products are no longer in circulation in stores or restaurants. This is considered the largest Cyclospora outbreak ever recorded in the United States. A total of 12,883 confirmed cases were reported across 21 states, with 570 hospitalizations and 2 deaths in Michigan.

FDA epidemiological and traceback investigations showed that the outbreak was linked to processed iceberg lettuce supplied by Taylor Farms de Mexico, with raw materials sourced from central Mexico. This product was distributed to numerous restaurants and retail chains across the United States.

Taylor Farms de Mexico voluntarily recalled iceberg lettuce sourced from the area starting July 17. The FDA subsequently inspected facilities and collected samples in Mexico, while coordinating with Mexican authorities to determine how the parasite entered the supply chain.

Cyclospora is commonly transmitted through food or water contaminated with human feces. Fresh produce can become contaminated during production if the soil or water sources used in farming are polluted. This makes water quality control, agricultural hygiene, and traceability vital links in ensuring produce safety.

Notably, although the outbreak has been declared over, the FDA is still continuing to investigate the exact cause of the Cyclospora contamination in the romaine lettuce. The agency stated that identifying the source of contamination is essential to preventing similar incidents across the agricultural supply chain in the future.