Last Updated: July 29, 2026
Medical Disclaimer: This article is for informational and educational purposes only and should not be considered medical advice. If you think you may be sick or have been exposed to contaminated food, contact your healthcare provider. Because food recalls and outbreak investigations can change rapidly, always refer to the Centers for Disease Control and Prevention (CDC) and the U.S. Food and Drug Administration (FDA) for the most current information.
Because food recalls and outbreak investigations can change rapidly, always refer to the Centers for Disease Control and Prevention (CDC) and the U.S. Food and Drug Administration (FDA) for the most current information.
If you’ve opened Facebook lately or watched the news, you’ve probably seen headlines about Cyclospora, recalled lettuce, and hundreds, now thousands, of people becoming sick.
At first, officials linked illnesses to shredded iceberg lettuce. Then a recall was announced. Shortly afterward, reports surfaced that one lettuce sample tested positive for Cyclospora but that result was later determined to be a false positive.
So…what’s actually going on?
Here’s an easy-to-understand breakdown of what health officials know as of July 29, 2026, what products are affected, what symptoms to watch for, and whether you need to worry every time you make a salad.
What Is Cyclospora?
Cyclospora (Cyclospora cayetanensis) is a microscopic parasite that infects the intestines and causes an illness called cyclosporiasis.
Unlike bacteria like Salmonella or E. coli, Cyclospora is a parasite that most commonly spreads through food or water contaminated with human waste.
Fresh produce, including leafy greens, herbs, berries, and vegetables, can become contaminated before it reaches grocery stores or restaurants.
One important thing to know is that Cyclospora does not usually spread directly from person to person. The parasite must mature outside the body before it becomes infectious.
What Is Happening Right Now?
Health officials are currently investigating one of the largest Cyclospora outbreaks seen in the United States in years.
The investigation has focused on shredded iceberg lettuce served at certain Taco Bell locations in nine states.
As of late July:
- More than 1,900 illnesses have been linked to this specific lettuce outbreak.
- Nearly 100 people have been hospitalized.
- No deaths have been reported.
At the same time, the CDC has reported thousands of Cyclospora cases nationwide, many of which are still being investigated. Not every illness has been linked to the recalled lettuce, meaning there may be multiple outbreaks occurring at the same time.
Which States Were Affected?
The lettuce-linked outbreak has included illnesses in:
- Illinois
- Indiana
- Kansas
- Kentucky
- Michigan
- Ohio
- Oklahoma
- Pennsylvania
- West Virginia
What Lettuce Was Recalled?
Taylor Farms de Mexico voluntarily recalled iceberg lettuce supplied from central Mexico.
The recall includes certain food-service products supplied to restaurants along with select Marketside products sold at Walmart.
Some recalled products include:
- Marketside Iceberg Salad
- Marketside Shredded Lettuce
with Best If Used By dates between July 18 and August 3, 2026.
If you still have one of these recalled products, the FDA recommends throwing it away or returning it to the store for a refund.
Didn’t They Say the Lettuce Tested Negative?
This is probably the most confusing part of the entire story.
Initially, the FDA announced that one lettuce sample appeared to test positive for Cyclospora.
After additional laboratory review, officials determined that the test result was actually a false positive.
That does not mean the lettuce was cleared.
The FDA says the investigation still points toward the recalled iceberg lettuce because of:
- interviews with people who became sick
- supply chain records
- traceback investigations linking the restaurants to the same lettuce supplier
In other words…
Health officials still believe the recalled lettuce is connected to the outbreak even though that one laboratory test turned out to be incorrect.
Why Are More Cases Still Being Reported?
Many people assume that if the recalled lettuce has already been removed from stores, the outbreak should be over.
Unfortunately, that’s not how foodborne illness investigations work.
Cyclospora symptoms usually begin about one week after eating contaminated food, but they can take even longer to appear.
After someone becomes sick, they still need to:
- visit a healthcare provider
- have specialized testing performed
- receive a diagnosis
- have the illness reported to public health officials
That process can take several weeks.
So even after the recalled lettuce is no longer being sold, official case numbers may continue increasing as previously infected people are diagnosed.
What Are the Symptoms?
Symptoms usually begin about one week after exposure.
Common symptoms include:
- Watery diarrhea
- Frequent bowel movements
- Stomach cramps
- Nausea
- Bloating
- Gas
- Loss of appetite
- Weight loss
- Fatigue
Some people also experience:
- headache
- body aches
- vomiting
- low-grade fever
Without treatment, symptoms can last several weeks and may even improve before returning.
Should You Stop Eating Lettuce?
Not necessarily.
This recall involves specific products, not every head of lettuce sold in America.
Health officials recommend:
✅ Check whether your lettuce is included in the recall.
✅ Throw away recalled products.
✅ Wash produce under running water before eating.
✅ Continue following normal food safety practices.
If you aren’t sure whether your lettuce is part of the recall, check the FDA recall page before eating it.
What Should You Do If You Think You’re Sick?
If you’ve had persistent diarrhea, especially after eating recalled products or eating at one of the affected restaurants, contact your healthcare provider.
Be sure to mention that you’re concerned about Cyclospora, since routine stool testing doesn’t always check for this parasite automatically.
Most healthy people recover with treatment, but symptoms can become prolonged without proper diagnosis.
The Bottom Line
As of July 29, 2026, the Cyclospora investigation is still ongoing.
Health officials continue to investigate the recalled iceberg lettuce linked to illnesses in multiple states, while also monitoring thousands of Cyclospora cases reported across the country.
Although one lettuce sample was later determined to be a false positive, the FDA says its investigation, including interviews with sick patients and supply-chain tracing, continues to support the recall.
If you have recalled lettuce at home, don’t eat it. Throw it away or return it to the store.
If you develop persistent diarrhea after eating recalled products or believe you’ve been exposed, contact your healthcare provider for evaluation.
Where This Information Comes From
This article summarizes publicly available information from the Centers for Disease Control and Prevention (CDC) and the U.S. Food and Drug Administration (FDA). It is intended to explain the outbreak in plain English and should not replace guidance from your healthcare provider or local health department. Because outbreak investigations and food recalls can change quickly, readers should refer to the official CDC and FDA websites for the latest updates.
