Cyclospora Outbreak Linked to Iceberg Lettuce Declared Over After 12,883 Illnesses

The largest foodborne cyclospora outbreak in recent United States history is officially over. On September 11, 2026, the Centers for Disease Control and Prevention (CDC) declared the multistate cyclospora outbreak linked to iceberg lettuce closed, after the investigation traced 12,883 confirmed illnesses, at least 570 hospitalizations, and two deaths across 21 states. The source was processed iceberg lettuce supplied by Taylor Farms de Mexico, which flowed into grocery stores, restaurants, and fast-food chains nationwide.

The announcement closes a months-long public health alert that began in the spring and grew into one of the largest recorded cyclosporiasis events ever documented in the country. For consumers, the key message is now about food safety awareness rather than active avoidance — but health officials say the lessons from the outbreak matter well beyond the recalled product.

How the Cyclospora Outbreak Unfolded

Cyclosporiasis cases began climbing in May 2026. By early summer, state and local health departments were interviewing hundreds of people who reported the same signature symptom: weeks of watery diarrhea that came and went. Investigators soon found a common thread — many patients had eaten shredded iceberg lettuce served at restaurants or sold in grocery stores.

The timeline moved quickly once the signal was clear:

• May 2026: Cyclospora case counts rise sharply, prompting multistate interviews.
• July 17, 2026: Taylor Farms de Mexico voluntarily removes all iceberg lettuce sourced from central Mexico from the U.S. market and initiates a recall.
• July 17, 2026: Taco Bell confirms it is no longer using lettuce from Taylor Farms de Mexico.
• August 2026: Additional interviews link more illnesses to the recalled product; hospitalizations are confirmed.
• September 11, 2026: The CDC declares the outbreak over and publishes final numbers.

The recall covered Marketside-brand iceberg salad and shredded lettuce sold at select Walmart stores, along with food-service products distributed to restaurants and other food outlets. The FDA noted that the recalled product had best-by dates from July 18 through August 3, 2026, meaning the lettuce should no longer be available for sale anywhere.

What Is Cyclospora, and Why Is It So Hard to Spot?

Cyclospora cayetanensis is a microscopic parasite that causes an intestinal illness called cyclosporiasis. Unlike many foodborne bacteria, it does not spread directly from person to person. Instead, it is transmitted when people consume food or water contaminated with the parasite — often fresh produce that was irrigated or washed with contaminated water.

That detail matters for public health. Because the parasite requires time in the environment to become infectious, outbreaks tied to fresh produce can be difficult to trace and can stretch across many states before a single source is identified. The iceberg lettuce investigation took months precisely because illnesses were spread over a wide geography and a long time window.

Symptoms of Cyclosporiasis

Most people who become infected develop symptoms within about a week of exposure, though the range can be longer. According to the FDA and CDC, common signs include:

• Watery diarrhea with frequent bowel movements
• Loss of appetite and weight loss
• Stomach cramps or pain
• Bloating and increased gas
• Nausea and fatigue
• Occasional vomiting, body aches, headache, or fever

Some infected people have no symptoms at all, which helps explain why case counts often lag behind real-world exposure. Without treatment, the illness can cause dehydration and complications lasting from days to a month or more. Symptoms may also seem to resolve and then return — a pattern known as relapse. People with weakened immune systems are at higher risk of longer, more severe illness and should seek medical care promptly.

Who Was Affected

The outbreak’s final toll reflects its scale and reach. Health officials confirmed illnesses across 21 states, with the largest clusters tied to restaurants and retail locations that served or sold the recalled lettuce. Nearly 600 people were hospitalized, and two deaths were reported. Beyond the confirmed cases linked to Taylor Farms de Mexico, the CDC also investigated thousands of other cyclosporiasis reports logged since May 1, reflecting how broadly the parasite circulated during the season.

The FDA has said it remains confident that all recalled iceberg lettuce related to the outbreak is off the market, and it continues its investigation into how the produce became contaminated in the first place.

What Consumers Should Do Now

The active recall is over, but food safety experts say a few habits can sharply reduce the risk of cyclosporiasis and other produce-related illnesses:

• Wash hands and surfaces often. Clean counters, cutting boards, and containers that may have touched recalled lettuce.
• Rinse fresh produce under running water. Washing does not eliminate all parasites, but it reduces contamination.
• Separate raw produce from risky foods. Avoid cross-contamination between unwashed items and ready-to-eat foods.
• Refrigerate promptly and follow safe handling advice for fresh fruits and vegetables.
• See a doctor for lingering diarrhea. If symptoms last more than a few days or keep returning, tell your provider what you ate in the two weeks before getting sick.

Cyclosporiasis is treatable, and clinicians who suspect it can order specific stool testing and prescribe appropriate antibiotics. Reporting symptoms to a health care provider also helps public health officials detect any future clusters early.

Why This Outbreak Matters Beyond Lettuce

The 2026 cyclospora outbreak is a reminder that food supply chains are long, fast, and interconnected. A single contaminated ingredient can reach dozens of states within days. It also highlights the value of rapid surveillance: the outbreak was ultimately contained by a combination of product recalls, supplier changes, and steady case interviews by state and local health departments.

For now, the CDC and FDA consider the event closed. But the investigation into the root cause continues, and public health officials say the data gathered this year will help strengthen future produce safety standards — and speed up the response the next time a parasite finds its way into the food supply.

Frequently Asked Questions

Is the iceberg lettuce cyclospora outbreak over?

Yes. The CDC declared the multistate outbreak over on September 11, 2026, and the recalled products had best-by dates that have already passed, so they should no longer be in stores or restaurants.

Can I still get sick from the recalled lettuce?

The recalled product is off the market, so the immediate risk is considered low. If you still have any of the recalled Marketside or food-service iceberg lettuce products at home, throw them away and sanitize anything they touched.

How many people got sick in the 2026 cyclospora outbreak?

CDC’s final update reported 12,883 illnesses across 21 states, at least 570 hospitalizations, and two deaths linked to the iceberg lettuce outbreak.

How does Cyclospora spread?

Cyclospora spreads through food or water contaminated with the parasite, most often fresh produce. It does not spread directly from person to person.

What are the most common cyclosporiasis symptoms?

Watery diarrhea, appetite loss, weight loss, stomach cramps, bloating, gas, nausea, and fatigue. Symptoms can come and go, and some people have no symptoms at all.

Should I see a doctor if I think I was exposed?

If you have persistent or recurring diarrhea, contact your health care provider. Tell them if you ate shredded iceberg lettuce in the two weeks before your symptoms began so they can test and treat appropriately.

Is cyclosporiasis treatable?

Yes. Health care providers can confirm the infection with specific stool testing and treat it with prescription antibiotics. Early care also reduces the risk of dehydration and complications.