FDA Confirms: California Farm Lettuce Tests Positive for Cyclospora as Outbreak Tops 1,600 Cases
**A sample of shredded iceberg lettuce from Taylor Farms de Mexico has tested positive for the parasite fueling the largest foodborne illness outbreak in the U.S. in years. The contaminated product is not covered by the current recall—and that's what has health officials worried.**
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## Introduction: A Positive Test That Changes Everything
For weeks, public health officials have been chasing the source of a massive cyclosporiasis outbreak that has sickened thousands across the Midwest. They suspected shredded iceberg lettuce from Taylor Farms. They traced it back to a single farm in central Mexico. They issued recalls and warned consumers.
But until Saturday, July 18, 2026, they didn't have a definitive laboratory confirmation.
The Food and Drug Administration announced that a sample of shredded iceberg lettuce supplied by Taylor Farms de Mexico has tested positive for *Cyclospora cayetanensis*—the parasite responsible for the outbreak. The sample was collected during targeted import surveillance as part of the agency's ongoing investigation.
**Here's the catch: the lettuce that tested positive is not part of the company's current recall**. That means there may be contaminated product still in commerce—or in your refrigerator.
"We are actively removing the implicated products," Taylor Farms said in its recall notice. But with a positive test on a product outside the recall, the FDA is now working to determine whether any part of that lot is still available in stores or in consumers' homes.
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## The Numbers That Matter: A Crisis by the Numbers
| Metric | Number |
|--------|--------|
| **Confirmed cases (5-state outbreak)** | 1,644 |
| **States with confirmed cases** | 34 |
| **Hospitalizations** | 94 |
| **Deaths** | 0 |
| **Michigan cases (as of July 16)** | 5,002+ |
| **Michigan hospitalizations** | 102 |
| **Ohio cases** | 1,192 |
| **Ohio hospitalizations** | 86 |
| **Additional cases under investigation** | 5,100+ |
The outbreak has sickened **1,644 people** across five states who reported eating at Taco Bell. Illnesses began as early as May 13 and continued through at least July 13. But the true number is almost certainly higher—many people recover without medical care and are never tested for Cyclospora.
Michigan has been the epicenter, with more than **5,000 cases** and **102 hospitalizations** as of July 16. Ohio has reported **1,192 cases** and 86 hospitalizations.
The CDC is also investigating **more than 5,100 additional cases** that require further analysis. And the outbreak may not be limited to the states with known illnesses.
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## The Positive Test: What We Know
The FDA's positive test result came from a sample of shredded iceberg lettuce collected through **targeted import surveillance**. The agency said the contaminated lot has been **detained** while the investigation continues.
Taylor Farms confirmed that the positive sample **is not part of the company's current voluntary recall**. That's a significant detail: the recall announced on July 17 covered specific Marketside-brand products sold at Walmart. The positive test came from a different lot.
The company is now "working to identify whether any part of this implicated lot is available in commerce or in consumers' homes," according to the FDA.
**The FDA's statement:** "The sample was collected during targeted surveillance while investigating the ongoing outbreak and that the positive lot has been detained".
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## The Recall: What's Been Pulled from Shelves
On July 17, Taylor Farms de Mexico announced it was **voluntarily removing all iceberg lettuce sourced from central Mexico** from the U.S. market. The company said it acted after receiving information from the FDA.
### Recalled Products
The recall includes **Marketside-brand** products sold at Walmart:
- 12-ounce and 24-ounce bags of **Marketside Iceberg Salad**
- 8-ounce and 16-ounce bags of **Marketside Shredded Lettuce**
These products were distributed between **June 29 and July 16** with "Best if Used By" dates ranging from **July 18 through Aug. 3, 2026**.
### Distribution
The affected lettuce was distributed in **27 states**, including Alabama, Arkansas, Connecticut, Florida, Georgia, Iowa, Illinois, Indiana, Kansas, Kentucky, Louisiana, Massachusetts, Maryland, Michigan, Missouri, Mississippi, North Carolina, New Hampshire, New Jersey, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, and Wisconsin.
### What's NOT Recalled
**Taylor Farms has emphasized that no Taylor Farms-branded salads or kits are associated with this outbreak**. The company's branded salad kits do not contain iceberg lettuce.
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## The Taco Bell Connection
The outbreak has been closely linked to shredded iceberg lettuce served at **Taco Bell locations** in five states:
- Indiana
- Kentucky
- Michigan
- Ohio
- West Virginia
**1,644 people** infected with Cyclospora reported exposure to Taco Bell. The FDA's traceback investigation identified Taylor Farms de Mexico as the common supplier of shredded iceberg lettuce used at those locations.
**Taco Bell's response:** The chain said it voluntarily removed all lettuce supplied by Taylor Farms from its restaurants after federal officials linked the outbreak to its locations. Not every Taco Bell in the affected states received the implicated lettuce.
**The CDC's advice:** "Do not eat shredded iceberg lettuce from Mexico served at Taco Bell locations in Indiana, Kentucky, Michigan, Ohio, and West Virginia".
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## The Farm at the Center: Less Than 1% of Supply
Taylor Farms has emphasized that the FDA's traceback points to a **single independent farm** that represents **less than 1% of the U.S.'s iceberg lettuce supply**.
But the company decided to remove **all iceberg lettuce from that growing region indefinitely** as a precaution.
"We are actively removing the implicated products," Taylor Farms said in its recall notice. "The company has stopped receiving product from the implicated lot, suspended distribution of the iceberg lettuce from Central Mexico, notified our customers, and we are continuing to work with the FDA, CDC, and state authorities".
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## What Is Cyclospora? The "Explosive Diarrhea" Parasite
Cyclosporiasis is caused by the parasite *Cyclospora cayetanensis*. It's a microscopic parasite that infects the intestinal tract and can cause prolonged, sometimes debilitating illness.
### Symptoms
Most people infected with Cyclospora develop **diarrhea, with frequent bowel movements**. Other common symptoms include:
- Loss of appetite
- Weight loss
- Stomach cramps and pain
- Bloating
- Increased gas
- Nausea
- Fatigue
Vomiting, body aches, headache, and fever may also occur.
### Duration and Complications
If not treated, the illness may lead to dehydration and severe complications that may require higher levels of care. These complications may last from **a few days to a month or longer**. Symptoms may seem to go away and then **return one or more times (relapse)**.
Immunocompromised persons may experience **more severe illness of longer duration** along with complications requiring close medical attention.
### Treatment
Cyclosporiasis is treatable with antibiotics. If you develop symptoms, contact your healthcare provider promptly.
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## What You Should Do Right Now
### 1. Check Your Fridge
If you have any iceberg lettuce products from Taylor Farms—especially Marketside-brand products from Walmart—**check the "Best if Used By" dates**. If the date falls between July 18 and August 3, 2026, **do not eat it**. Throw it away or return it to the store for a refund.
### 2. Avoid Taco Bell in Affected States
If you live in or are traveling through Indiana, Kentucky, Michigan, Ohio, or West Virginia, **do not eat shredded iceberg lettuce from Mexico served at Taco Bell**.
### 3. If You Don't Know the Source, Ask
If you're eating at a restaurant and aren't sure where the lettuce came from, ask. If the staff can't tell you, consider avoiding the item.
### 4. Watch for Symptoms
Symptoms typically appear **one to two weeks after exposure**. If you develop diarrhea (especially "explosive" bouts), abdominal cramps, nausea, or fatigue, contact your healthcare provider.
### 5. Wash Your Produce
While washing may not remove Cyclospora entirely, it's still a good practice. The FDA notes that rinsing or washing food is **not likely to remove** Cyclospora, but it can reduce other risks.
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## The Human Element: What This Means for You
**For the parent in Michigan**: You've been following this outbreak for weeks. You checked your fridge. You threw away the lettuce. But you're still worried—your child had a Taco Bell salad three weeks ago, and now they're not feeling well.
**For the Taco Bell employee**: You've been handing out tacos all week. You didn't know about the lettuce until you saw it on the news. Now you're worried about whether you might have served contaminated food to customers.
**For the Walmart shopper**: You bought that Marketside iceberg salad last week. You saw the recall notice on your phone. Now you're wondering if it's too late.
**For the patient**: You've been dealing with explosive diarrhea for weeks. You've lost weight. You're exhausted. You just want it to end—and you want to know where it came from.
**For the public health official**: You've been working around the clock to trace the source. You finally have a positive test. But there's still more work to do—and more people are getting sick every day.
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## Frequently Asked Questions
### Q: What is cyclosporiasis?
Cyclosporiasis is an intestinal illness caused by the parasite *Cyclospora cayetanensis*. It causes watery diarrhea (often explosive), loss of appetite, abdominal cramps, nausea, fatigue, and weight loss.
### Q: How many people have been affected?
As of July 18, 2026, **1,644 people** have been confirmed infected in the five-state outbreak linked to Taco Bell. The CDC is also investigating more than 5,100 additional cases nationwide.
### Q: Which states are most affected?
**Michigan** has been hit the hardest, with more than **5,000 cases** and **102 hospitalizations** as of July 16. Ohio has reported **1,192 cases** and **86 hospitalizations**. The outbreak has also affected Indiana, Kentucky, and West Virginia.
### Q: What did the FDA test positive?
The FDA confirmed that a sample of shredded iceberg lettuce supplied by Taylor Farms de Mexico tested positive for *Cyclospora*. The sample was collected through targeted import surveillance.
### Q: Is the positive sample part of the recall?
No. The positive sample is **not part of the company's current recall**. The FDA is working to determine if any of that lot is still in commerce or in consumers' homes.
### Q: What products are recalled?
Recalled products include **Marketside-brand** iceberg salad and shredded lettuce sold at Walmart. The recall covers products distributed between June 29 and July 16 with "Best if Used By" dates from July 18 through Aug. 3, 2026.
### Q: Is Taylor Farms-branded lettuce safe?
Taylor Farms has said **no Taylor Farms-branded salads or kits are associated with this outbreak**. The company's branded salad kits do not contain iceberg lettuce.
### Q: Can I eat at Taco Bell?
Taco Bell has voluntarily removed all lettuce supplied by Taylor Farms from its restaurants. However, the CDC has advised consumers not to eat shredded iceberg lettuce from Mexico served at Taco Bell locations in Indiana, Kentucky, Michigan, Ohio, and West Virginia.
### Q: What should I do if I have symptoms?
If you develop symptoms of cyclosporiasis, contact your healthcare provider promptly. The illness is treatable with antibiotics.
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## Conclusion: A Positive Test, a Continuing Investigation
The FDA's confirmation that a sample of Taylor Farms lettuce has tested positive for Cyclospora is a significant development in the largest foodborne illness outbreak in the U.S. in years. It provides the laboratory evidence that investigators have been seeking for weeks.
But it also raises new questions. The positive sample is not part of the current recall. That means there may be contaminated product still out there. The FDA is working to determine whether any of that lot is still available—and to prevent more people from getting sick.
For consumers, the message is clear: check your fridge, know where your lettuce came from, and if you're in the affected states, avoid shredded iceberg lettuce from Mexico at Taco Bell.
The outbreak has sickened 1,644 people and hospitalized 94. The true number is almost certainly higher. And with symptoms that can last for weeks or months, the human toll is significant.
**What's next?** The FDA and CDC are continuing their investigation. Taylor Farms has removed all iceberg lettuce from the implicated region. Taco Bell has pulled the affected lettuce from its supply chain.
But until the investigation is complete, consumers should remain vigilant. Check your fridge. Watch for symptoms. And if you're unsure about your lettuce, throw it out.
## Disclaimer
**IMPORTANT:** This article is for informational and educational purposes only and does not constitute medical advice. If you suspect you have cyclosporiasis or are experiencing symptoms, contact a healthcare provider immediately. The information contained herein is based on publicly available sources and reflects the author's understanding as of the publication date. The cyclosporiasis outbreak is ongoing, and case counts, affected areas, and recall information are subject to change.
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*Published: July 19, 2026*
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**Tags:** FDA, cyclosporiasis, Taylor Farms, iceberg lettuce recall, Cyclospora outbreak, food safety, Taco Bell lettuce recall, parasite outbreak, cyclospora symptoms, lettuce recall 2026, Michigan outbreak, Ohio outbreak, Taylor Farms recall, FDA investigation, CDC cyclospora, produce recall, food contamination, intestinal illness, restaurant food safety, cyclospora treatment
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