Cyclosporiasis Outbreak Update: Latest U.S. Case Reports, Affected States, Symptoms, and Safety Guidance

Understanding the Growing Cyclosporiasis Situation Across the United States

Health officials across the United States are monitoring an increase in reported cases of cyclosporiasis, a foodborne illness caused by the parasite Cyclospora cayetanensis. The infection is typically linked to consuming food or water contaminated with microscopic traces of fecal matter. While cases occur every year, several states have reported higher-than-usual numbers during the 2026 summer season.

According to health officials, some infections are connected to domestic exposure, while others are linked to international travel. Investigations are ongoing in multiple states to determine whether cases are connected to a broader national outbreak.

Recent reports indicate that shredded iceberg lettuce served at Taco Bell has been identified as a possible source connected to some illnesses and hospitalizations. However, health agencies continue to investigate additional potential sources, including other types of produce.

What Is Cyclosporiasis?

Cyclosporiasis is an intestinal infection caused by the Cyclospora parasite. People usually become infected after eating contaminated fresh produce or drinking contaminated water.

The illness commonly causes:

• Persistent watery diarrhea
• Stomach cramps
• Abdominal pain
• Bloating
• Loss of appetite
• Nausea
• Fatigue
• Weight loss in prolonged cases

Symptoms may appear several days after exposure and can last for weeks or return after improving if untreated.

Doctors generally treat cyclosporiasis with specific antibiotics. Health authorities also recommend maintaining hydration because prolonged diarrhea can lead to dehydration, especially among older adults, children, and people with weakened immune systems.

States Reporting Cyclosporiasis Cases

More than 30 states have reported cyclosporiasis cases in 2026. However, health officials emphasize that not every reported infection is connected to the wider outbreak investigation.

Some states have reported unusually high numbers, while others say their case counts remain within expected seasonal levels.

States With Notable Case Numbers

Michigan has reported one of the largest increases, with more than 5,000 cases and over 100 hospitalizations. Officials said lettuce or salad greens may be a possible source, although other foods have not been ruled out.

Indiana reported 327 cases, a significant increase compared with previous years. Officials have not yet identified a specific source.

Ohio reported a large number of infections, including more than 1,400 cases in northwest Ohio, according to local health officials.

New York recorded more than 500 cases between May and mid-July. State officials said the numbers did not represent a major departure from normal seasonal patterns but continue to investigate possible sources.

North Carolina reported more than 300 cases and several hospitalizations, with officials advising residents experiencing severe or long-lasting diarrhea to seek medical attention.

Illinois reported more than 200 cases, including domestically acquired infections and hospitalizations.

Other states reporting cases include Kentucky, Texas, Colorado, Florida, Kansas, Iowa, Connecticut, Maryland, Virginia, Wisconsin, and West Virginia.

Are All Reported Cases Connected to the Outbreak?

Health departments have stressed that identifying cases does not automatically mean they are part of the same outbreak.

For example, several states reported that many infections were related to international travel rather than contaminated food sources inside the United States.

Officials in California, Massachusetts, Minnesota, Nebraska, Utah, Washington, and other states said they have not identified evidence linking their cases to the larger outbreak investigation.

Disease tracking systems help health authorities identify unusual patterns, compare cases, interview patients about possible exposures, and determine whether infections share a common source.

How to Reduce the Risk of Cyclosporiasis

Consumers can take several steps to lower their risk of infection from contaminated food or water.

Health experts recommend:

Wash Hands Frequently

Wash hands thoroughly with soap and water before preparing food, before eating, and after handling raw produce.

Handle Fresh Produce Carefully

Fresh fruits and vegetables should be washed under running water before consumption. Washing produce does not always remove all parasites, but it can reduce contamination.

Be Careful With Bagged Salad Products

Ready-to-eat salad mixes may carry a higher risk because they often contain multiple ingredients processed together. Consumers should follow package instructions and monitor food safety alerts.

Remove Outer Lettuce Leaves

Removing several outside layers of lettuce before preparation may help reduce exposure to contaminants that may be present on the surface.

Cook Produce When Appropriate

Cooking certain vegetables can help destroy parasites and reduce infection risk.

When Should You Contact a Doctor?

People experiencing prolonged or severe diarrhea should consider contacting a healthcare provider.

Medical advice is especially important for people who:

• Have diarrhea lasting several days
• Experience dehydration symptoms
• Have severe abdominal pain
• Are elderly, pregnant, or immunocompromised
• Recently traveled internationally

A healthcare professional can determine whether testing for Cyclospora is appropriate and recommend treatment if needed.

Ongoing Investigations Continue

Public health agencies across the country continue working with local health departments, laboratories, and federal agencies to better understand the 2026 cyclosporiasis situation.

Although some cases appear connected to a wider outbreak, officials say many reported infections have no confirmed connection to a shared source. Investigations into food products, travel histories, and possible contamination pathways remain ongoing.

Consumers should stay informed through updates from public health agencies and follow food safety recommendations to reduce their risk.

Source: The Epoch Times, published July 17, 2026.

Disclaimer

This article is a written summary based on publicly available reporting and health department information. It is intended for informational purposes only and should not replace advice from qualified healthcare professionals. Case numbers and outbreak investigations may change as officials collect additional data.