Cyclospora Outbreak Linked to Lettuce — Taco Bell Pulls Produce, 5,100+ Cases Across 34 States

The short version: A Cyclospora outbreak that began in late May 2026 has spread to at least 34 states. The CDC had confirmed 843 cases and 86 hospitalizations as of July 9. By July 14, reporting from state health agencies put total unconfirmed cases above 5,100. Michigan alone accounts for more than 2,600 cases. Health officials suspect leafy lettuce and bagged salad greens are involved. Taco Bell has pulled four produce items from some locations as a precaution, but the investigation extends well beyond the chain.

What Is Cyclospora — and What Does It Do to You

Cyclospora cayetanensis is a microscopic parasite that infects the small intestine. Unlike bacteria such as Salmonella or E. coli, Cyclospora cannot be seen or smelled on food. There is no way to know a piece of produce is contaminated without laboratory testing. The parasite does not spread from person to person — you have to eat or drink something that contains it.

The illness it causes, called cyclosporiasis, is not like a typical 24-hour stomach bug. Symptoms can begin anywhere from two days to two weeks after exposure and typically include:

• Profuse, watery diarrhea — described in medical literature and CDC advisories as explosive; multiple episodes per day are common
• Severe stomach cramps and bloating
• Nausea and vomiting
• Fatigue and body aches — often more severe than with typical food poisoning
• Low-grade fever and loss of appetite
• Weight loss in prolonged cases

What makes Cyclospora particularly serious is how long it lasts. Without treatment, cyclosporiasis can cause symptoms that come and go for weeks or even months. Even after apparent recovery, relapse is common. Treatment requires a specific antibiotic (trimethoprim-sulfamethoxazole) — standard anti-diarrheal medications do not eliminate the parasite. People with weakened immune systems can develop significantly more severe disease.

Why Lettuce Is the Leading Suspect

Cyclospora outbreaks in the United States have historically been linked to fresh produce — particularly leafy greens, herbs, and berries that are typically eaten raw. The parasite cannot survive cooking, but it thrives in contaminated irrigation water and soil. When contaminated water contacts produce during growing, harvesting, or washing, the parasite can persist on the surface of leaves until it reaches a consumer.

Michigan health officials have identified leafy lettuce and bagged salad greens as the most likely vehicle in this outbreak. Investigators are tracing the supply chains of lettuce served at multiple types of restaurants and sold through grocery retailers. Taco Bell, whose menu heavily features lettuce across most of its core items, has emerged as one focus of the investigation — but officials have been clear that sick patients include people who did not eat at Taco Bell.

The Washington Post, citing officials familiar with the investigation, reported that the probe extends to multiple potential sources, and that no single chain or supplier has been confirmed as the origin.

What Taco Bell Has Done

Taco Bell confirmed that it has temporarily and voluntarily removed certain produce items from select locations. Signs posted at Detroit-area restaurants stated the chain was “currently unable to sell Lettuce, Cilantro Onion, Pico de Gallo, and Guacamole due to a nationwide recall.” The company has not issued a public statement characterizing itself as the source of the outbreak, and federal investigators have not named Taco Bell as the confirmed source.

The voluntary removal of produce is a precautionary step that large food service chains often take when their ingredients overlap with products under investigation — even before a definitive link is established. It is consistent with how Chipotle, McDonald's, and other chains have responded to past produce-related outbreak investigations.

What the CDC and FDA Are Doing

The CDC is tracking confirmed and probable cases nationally and working with state health departments to identify patterns — which restaurants sick patients ate at, what specific produce items they consumed, and where that produce was grown or processed. The FDA is responsible for tracing the supply chain once a likely source product is identified.

As of July 9, the CDC had confirmed 843 cases across 31 states with 86 hospitalizations. The agency notes it is also aware of more than 1,500 additional cases that require further analysis. State-level reporting, particularly in Michigan, is significantly higher: that state alone has logged more than 2,600 cases since June 22.

The geographic spread — 34 states — suggests the contaminated product moved through a national distribution network, which is consistent with large-scale commercial produce supply chains. Investigators have not yet identified the specific farm, processor, or distributor responsible.

If You Got Sick After Eating Lettuce or Dining Out

Anyone who developed severe gastrointestinal illness in late May, June, or July 2026 — especially prolonged or relapsing diarrhea — and ate at a restaurant serving fresh lettuce should contact their doctor. Cyclosporiasis is diagnosed through a stool test that specifically looks for Cyclospora oocysts; standard stool tests do not always detect it, so patients should specifically ask their provider to test for Cyclospora if they suspect exposure.

This outbreak is still developing. The legal picture will come into sharper focus once investigators identify the source. When a contaminated food product causes a documented outbreak, people who were sickened may have legal rights against those responsible for the contamination — whether that is a grower, processor, distributor, or restaurant operator. The nature of those rights depends on what the investigation reveals about where and how the contamination occurred.

If you or a family member became seriously ill with diarrhea after consuming fresh produce and believe it may be connected to this outbreak, you can fill out our free intake form. There is no cost to tell us what happened, and no obligation to proceed.