Cyclosporiasis Outbreak 2026: Largest U.S. Multistate Outbreak Ends
Why in News?
U.S. federal health officials declared the largest recorded multistate cyclosporiasis outbreak over on 11 September 2026. The outbreak was linked to processed iceberg lettuce from Taylor Farms de Mexico, sourced from central Mexico. It caused 12,883 illnesses across 21 U.S. states, including 570 hospitalisations and two deaths. The Food and Drug Administration (FDA) continues to investigate the cause of contamination. The recalled lettuce is no longer available in stores or restaurants.
What is Cyclosporiasis?
Cyclosporiasis is an intestinal infection caused by the microscopic parasite Cyclospora cayetanensis. The parasite generally spreads when food or water becomes contaminated with infected human faecal matter. Direct person-to-person transmission is considered unlikely because the parasite requires time outside the body to become infectious.
Common Symptoms
The infection can cause:
- Frequent watery diarrhoea
- Loss of appetite
- Weight loss
- Stomach cramps and abdominal pain
- Bloating and increased gas
- Nausea
- Fatigue
Symptoms can disappear and return repeatedly if the infection is not properly treated.
2026 Cyclosporiasis Outbreak
The CDC and FDA began investigating the multistate outbreak in July 2026. Epidemiological and traceback investigations linked the outbreak to iceberg lettuce supplied by Taylor Farms de Mexico. The investigation included people who reported eating processed lettuce at different locations, including Taco Bell outlets.
Key Outbreak Figures
| Indicator | Final figure |
|---|---|
| Reported illnesses | 12,883 |
| States affected | 21 |
| Hospitalisations | 570 |
| Deaths | 2 |
| Main implicated food | Processed iceberg lettuce |
| Supplier | Taylor Farms de Mexico |
| Source region | Central Mexico |
| Recall initiated | 17 July 2026 |
| Outbreak declared over | 11 September 2026 |
The outbreak was the largest recorded U.S. multistate cyclosporiasis outbreak.
Michigan Impact
Michigan was among the hardest-hit states. State data recorded more than 14,000 cyclosporiasis cases, while two deaths were reported in the state. The two deaths occurred among people with significant underlying health conditions that were adversely affected by cyclosporiasis and dehydration.
Taylor Farms Lettuce Recall
Taylor Farms de Mexico voluntarily recalled iceberg lettuce sourced from central Mexico on 17 July 2026. The recall covered products distributed through food-service channels and retail outlets. Some recalled products had best-by dates extending into early August. The FDA later confirmed that the recalled products had passed their best-by dates and should no longer be available.
Broader U.S. Cyclosporiasis Situation
The lettuce-linked outbreak represented only part of the country’s cyclosporiasis cases in 2026. As of 8 September 2026, the CDC had recorded 19,595 laboratory-confirmed domestically acquired cases since 1 May. These cases occurred across 49 states and Washington, D.C. The FDA continues to investigate other Cyclospora clusters and the source of contamination associated with Taylor Farms.
Food Safety and Public Health Significance
The outbreak highlights the importance of:
- Food traceability and supplier verification
- Safe agricultural water management
- Hygienic food processing
- Laboratory surveillance
- Rapid food recalls
- State and federal outbreak coordination
It also demonstrates the challenges of tracing foodborne parasites through complex international food-supply chains.
Cyclosporiasis outbreak 2026: Important Facts
| Particular | Fact |
|---|---|
| Disease | Cyclosporiasis |
| Causative organism | Cyclospora cayetanensis |
| Nature | Intestinal parasitic infection |
| Main transmission | Contaminated food or water |
| 2026 outbreak food | Iceberg lettuce |
| Supplier | Taylor Farms de Mexico |
| Main source region | Central Mexico |
| Outbreak cases | 12,883 |
| States affected | 21 |
| Hospitalisations | 570 |
| Deaths | 2 |
| Recall date | 17 July 2026 |
| Outbreak declared over | 11 September 2026 |
| U.S. cases since 1 May | 19,595 |
| Main agencies | CDC and FDA |
