Federal health officials announced Friday that the record-breaking cyclospora outbreak affecting the United States has concluded, with the Food and Drug Administration expressing confidence that all recalled iceberg lettuce connected to the incident has been removed from commerce.
Approximately 13,000 confirmed cyclospora cases were attributed to the multistate outbreak, representing the majority of an unprecedented surge in the parasitic illness this year. Since May 1, the government documented nearly 20,000 lab-confirmed cases—more than 16 times the number reported during the equivalent period the previous year. An additional 6,100 suspected cases were also reported. The previous record year for cyclospora infections in the United States was 2019, when approximately 4,700 illnesses were documented nationwide.
The outbreak primarily affected 21 states and was traced to iceberg lettuce, though thousands of additional cases have not been linked to that specific source. Michigan experienced the highest case count and accounted for the two deaths connected to the outbreak. Investigators initially focused on lettuce served at Taco Bell locations before identifying Taylor Farms as the probable source. The company subsequently recalled iceberg lettuce grown in central Mexico, with thousands of packaged salad products distributed to major restaurant chains including properties owned by Yum Brands.
Despite the outbreak’s conclusion, significant questions persist regarding how the contamination occurred. Cyclospora spreads through human feces, and the mechanism by which sewage contaminated sufficient food supplies to affect such a large population remains unexplained. Experts note that contamination can result from produce grown in contaminated soil or contact with polluted water. The FDA has concluded on-site inspections and sample collection activities at Mexican growers and processing facilities, though analysis of collected samples remains pending.
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