Is the cyclospora outbreak over? Not officially, according to the newest data released by the CDC on August 20, 2026. Confirmed cyclospora cases have climbed past 15,700 nationwide since May 1, marking the largest cyclosporiasis outbreak in U.S. history. Health officials say the source of contamination has been removed, but the investigation and case reporting remain active.
The outbreak stems from iceberg lettuce processed by Taylor Farms de Mexico. Contaminated lettuce reached restaurants and stores across the country before a recall took effect in mid-July. Since then, new illnesses tied to the tainted produce have slowed sharply, though officials continue logging cases as lab results and interviews come in.
What the Latest Numbers Show
The CDC’s national surveillance page reports 15,716 laboratory-confirmed cyclosporiasis cases acquired domestically since May 1, 2026. That figure dwarfs the 1,180 cases recorded during the same stretch in 2025. Roughly 11,841 additional reports are still under review and have not yet been formally added to the count.
Within that broader national total sits a specific multistate outbreak directly linked to the lettuce recall. As of August 20, at least 10,930 people across 17 states have reported getting sick after eating processed iceberg lettuce tied to Taylor Farms de Mexico. Many of these illnesses trace back to meals eaten at Taco Bell locations.
Here is a snapshot of where things stand:
| Metric | Figure (as of Aug 20, 2026) |
|---|---|
| National confirmed cases since May 1 | 15,716 |
| Multistate outbreak cases (17 states) | 10,930 |
| Hospitalizations reported | 454 |
| Deaths reported | 2 (Michigan) |
| States affected | 17 |
| Recall date | July 17, 2026 |
Where the Outbreak Started
Investigators traced the contamination to iceberg lettuce processed at a Taylor Farms facility in central Mexico. Traceback and genotyping data confirmed that samples from sick patients shared a genetic link, pointing to a single contaminated source rather than scattered, unrelated illnesses.
Taco Bell locations in nine states served the tainted lettuce, including Indiana, Kentucky, Michigan, Ohio, West Virginia, Kansas, Oklahoma, Illinois, and Pennsylvania. Some patients in states without direct distribution, such as Washington, fell ill after traveling to affected areas and eating at exposed locations.
Taylor Farms de Mexico issued a voluntary recall on July 17, 2026, pulling all iceberg lettuce sourced from its central Mexico operations. The CDC now confirms the best-by dates on recalled products have passed, meaning contaminated lettuce should no longer sit on store shelves or in restaurant kitchens.
Illness Timeline and Severity
Illnesses tied to this outbreak began appearing around June 14, 2026, with onset dates continuing through August 11. That six-week window reflects how cyclosporiasis symptoms can take one to two weeks to appear after exposure, and confirming a case as outbreak-related can take up to six weeks due to lab and interview delays.
At least 454 people required hospitalization nationwide. Two deaths occurred in Michigan, both involving individuals with significant underlying health conditions that may have worsened due to infection and dehydration. Officials note that fatal outcomes from cyclosporiasis remain rare in the United States, and both Michigan deaths involved illness onset dates before the recall took effect.
Michigan has emerged as the hardest-hit state, with its health department reporting case counts nearing 14,000 by mid-August. State officials caution that recent jumps in Michigan’s numbers reflect a backlog in lab reporting rather than fresh transmission, since the contaminated lettuce left the supply chain in mid-July.
Why Case Counts Keep Rising Even as the Outbreak Winds Down
Case totals continue climbing week over week, which can create confusion about whether the outbreak is truly ending. Public health officials explain this pattern clearly: cyclosporiasis diagnosis often lags behind actual infection by several weeks.
Several factors drive the delayed reporting:
- Stool testing requires specialized microscopy, and parasite shedding can be intermittent, sometimes requiring multiple samples.
- State and local health departments must interview each patient to confirm outbreak association.
- Confirming a case as outbreak-related can take up to six weeks from symptom onset.
- Many infected people recover without seeking medical care and are never tested.
Because of this reporting lag, the CDC states the true number of illnesses is likely far higher than the confirmed count. Even so, the actual transmission window has closed. The tainted lettuce left shelves after the July 17 recall, and the median reported illness onset date sits in early July, well before the current wave of confirmations.
FDA and State Health Guidance
The FDA has indicated that fresh iceberg lettuce currently available in stores and restaurants is not linked to the contaminated batches. Several state health departments, including Michigan’s, have lifted earlier advisories that urged extra caution around lettuce and salad greens.
Washington State health officials report they are not experiencing a local increase in cases among residents who did not travel outside the state, even while monitoring the broader multistate situation. This pattern holds across several states that recorded travel-related cases rather than local spread.
The CDC continues investigating a handful of separate cyclosporiasis clusters unrelated to the lettuce outbreak. At least six other clusters remain under review, and officials say they will issue new outbreak notices if a source is confirmed and public action becomes necessary.
Symptoms to Watch For
Cyclosporiasis causes watery diarrhea, stomach cramps, bloating, nausea, fatigue, and loss of appetite. Symptoms typically begin about one week after exposure, though the range can span two to fourteen days. The illness spreads through contaminated food or water, not through person-to-person contact.
Anyone experiencing prolonged diarrhea after eating at an affected restaurant or purchasing recalled lettuce should contact a healthcare provider. Diagnosis requires a stool sample tested with specialized microscopy, and treatment typically involves an antibiotic regimen, along with hydration and electrolyte support. Most patients recover fully, though immunocompromised individuals may face a longer illness course.
Where Things Stand Today
Based on the most recent CDC and state updates, the active transmission phase of this outbreak has ended. The contaminated lettuce is gone from the supply chain, and new exposures tied to the original source are not expected. What remains is a reporting tail: thousands of already-infected people working through lab confirmation and case interviews.
The formal cyclosporiasis season, which the CDC defines as running from May 1 through August 31 each year, is nearing its close. Officials expect case counts to level off in the coming weeks as the backlog clears, even though the multistate outbreak page will likely stay active until confirmations are complete.
For now, the answer to whether the cyclospora outbreak is over sits in a middle ground. The danger has passed for consumers, but the record-breaking case count will keep rising on paper for weeks to come.
Have you or someone you know been affected by this outbreak? Share your experience in the comments below.