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What is the Cyclosporiasis Outbreak Linked to Taco Bell?
A massive cyclosporiasis outbreak in the United States has been linked to shredded iceberg lettuce supplied by Taylor Farms and served at Taco Bell restaurants. The outbreak, which began in May 2026, has sickened nearly 7,000 people across 34 states, making it the largest cyclosporiasis outbreak in U.S. history. Health officials from the CDC and FDA have identified the lettuce supplier as the likely source of the Cyclospora cayetanensis parasite.
The largest foodborne illness outbreaks in US history are rare, but this one has already surpassed previous records. Michigan is the epicenter, with over 4,300 confirmed and probable cases and more than 100 hospitalizations. Other heavily affected states include Ohio, West Virginia, Kentucky, and New York.
How Did the Outbreak Happen?
Traceback Investigation
According to sources familiar with the investigation, the CDC and FDA conducted interviews with patients, many of whom reported eating at Taco Bell shortly before falling ill. Shredded iceberg lettuce was the common ingredient. Investigators traced the lettuce supply chain back to Taylor Farms, a major produce supplier based in California that sources some of its iceberg lettuce from Mexico.
The FDA's traceback investigation identified a single supplier of iceberg lettuce from Mexico used by Taco Bell locations in five states: Indiana, Kentucky, Michigan, Ohio, and West Virginia. Taco Bell has voluntarily removed the potentially impacted lettuce from its supply chain nationwide and has committed to stopping use of lettuce from that supplier.
What is Cyclosporiasis?
Cyclosporiasis is an intestinal illness caused by the microscopic parasite Cyclospora cayetanensis. People become infected by ingesting food or water contaminated with feces containing the parasite. Symptoms typically appear about one week after exposure, ranging from 2 days to over 2 weeks.
Common symptoms include:
- Watery diarrhea (the most common symptom)
- Loss of appetite and weight loss
- Stomach cramps and bloating
- Nausea and fatigue
- Increased gas
Less common symptoms include vomiting, body aches, headache, and low-grade fever. Without treatment, symptoms can last from a few days to over a month, and diarrhea may relapse. The prescription antibiotic trimethoprim-sulfamethoxazole (Bactrim) is the standard treatment.
Impact and Response
Scale of the Outbreak
As of July 17, 2026, the CDC reports 1,645 laboratory-confirmed domestic cases across 34 states, with 141 hospitalizations and no deaths. However, over 5,100 additional illnesses are under review, and health officials estimate the true total approaches 7,000 cases — six times higher than the same period in 2025. This is expected to be the largest cyclosporiasis outbreak ever recorded in the United States.
The CDC outbreak investigation protocols have been activated across multiple states. Michigan alone has reported over 4,300 cases, a dramatic increase from its typical 50 annual cases. Ohio is a secondary hotspot with 177 confirmed cases. The outbreak has affected people ranging in age from young children to the elderly, with a median patient age of 44.
Taco Bell's Response
Taco Bell acted quickly once alerted to the potential link. On July 15, 2026, the chain voluntarily removed fresh ingredients, including shredded lettuce, from select restaurant locations as a precautionary measure. The company later announced it would indefinitely remove the potentially impacted lettuce from its supply chain nationwide and replace it within 24 hours in select states.
We are committed to the safety of our customers and are following the guidance of health authorities, a Taco Bell spokesperson said. The chain emphasized that it acted on its own initiative before investigators confirmed Taco Bell as a source, distinguishing this from the 2018 Cyclospora outbreak where McDonald's removed salads only after a confirmed investigative link.
Taylor Farms Statement
Taylor Farms, the lettuce supplier identified by investigators, has not yet issued a public statement regarding the outbreak. The company is one of the largest produce suppliers in North America, providing shredded lettuce and salad mixes to fast-food chains and grocery stores nationwide. The FDA continues its investigation at the farm level in Mexico to determine how the parasite contaminated the lettuce.
How to Protect Yourself
The CDC advises consumers not to eat shredded iceberg lettuce from Taco Bell locations in the affected states. Anyone who has eaten at Taco Bell and developed symptoms of cyclosporiasis should seek medical attention and request specific testing for Cyclospora, as routine stool tests may not detect the parasite.
Prevention measures include:
- Washing all fresh produce thoroughly under running water
- Following food recall alerts from the FDA and CDC
- Cooking produce when possible, as heat kills the parasite
- Avoiding untreated water from lakes, rivers, or wells
- Practicing good hand hygiene after using the bathroom and before handling food
The food safety regulations for imported produce are under scrutiny as this outbreak highlights ongoing vulnerabilities in the fresh produce supply chain.
FAQ
What is cyclosporiasis?
Cyclosporiasis is an intestinal infection caused by the parasite Cyclospora cayetanensis. It causes watery diarrhea, stomach cramps, nausea, and fatigue, typically lasting weeks if untreated.
How is cyclosporiasis treated?
The standard treatment is the antibiotic trimethoprim-sulfamethoxazole (Bactrim). Without treatment, symptoms can persist for weeks to over a month and may relapse.
Is the Taco Bell lettuce still being served?
No. Taco Bell has voluntarily removed the potentially impacted shredded iceberg lettuce from its supply chain nationwide. The company is working with a new supplier.
How many people have been affected?
As of July 17, 2026, the CDC reports 1,645 confirmed cases with 141 hospitalizations. However, over 5,100 additional illnesses are under investigation, with estimates suggesting nearly 7,000 total cases across 34 states.
Can cyclosporiasis be spread from person to person?
No. The Cyclospora parasite requires time outside the body to become infectious (sporulation), so person-to-person transmission is unlikely. Infection occurs through ingestion of contaminated food or water.
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