The Centers for Disease Control and Prevention announced Friday that the United States’ largest documented cyclosporiasis outbreak has concluded. The disease outbreak, traced to contaminated iceberg lettuce, resulted in 12,883 confirmed cases across 21 states, with 570 hospitalizations and two fatalities recorded. Symptoms of cyclosporiasis typically emerge approximately one week after consumption of contaminated food or water, though onset can occur as early as two days or as late as two weeks following exposure. Common manifestations include frequent watery diarrhea, along with loss of appetite, weight loss, stomach cramps, bloating, nausea, and fatigue.
Investigators traced the outbreak to iceberg lettuce sourced from central Mexico by Taylor Farms de Mexico, which initiated a recall of all iceberg lettuce from that region on July 17. The contaminated produce was initially identified at Taco Bell locations before broader distribution through Taylor Farms to restaurants and retailers nationwide was determined. The outbreak reached peak intensity when over 1,000 infections were reported within a single day. By August, daily case reports had declined to fewer than two on average, prompting health officials to declare the outbreak contained after confirming that all recalled lettuce had been removed from circulation.
Michigan experienced the greatest impact from the lettuce-linked outbreak and accounted for both recorded deaths. The incident occurred amid a broader surge in cyclosporiasis cases nationwide this year. Since May 1, approximately 20,000 laboratory-confirmed cases have been reported across the country, representing a more than 16-fold increase compared to the same period the previous year. The previous record year for cyclosporiasis cases was 2019, when roughly 4,700 illnesses were documented.
The outbreak has prompted renewed examination of United States food safety protocols and regulatory oversight capabilities. Critics highlighted challenges in the Food and Drug Administration’s foreign facility inspection program, which has declined substantially in recent years. The FDA is tasked with inspecting more than 19,000 international food sites annually but reached only 1,700 inspections in 2019, less than one-tenth of the target. The Mexican farm implicated in the outbreak was not inspected until approximately one month after the investigation commenced. The FDA has since completed on-site inspections and sample collection at iceberg lettuce farms and processing facilities in Mexico, though laboratory analysis remains ongoing.
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