Understanding the 2026 Cyclospora Outbreak: Key Information for Veterans and Families

Cyclospora Outbreak 2026: What Veterans and Families Need to Know

The 2026 Cyclospora outbreak is the largest in U.S. history, with 1,645 confirmed domestic cases and more than 5,100 additional cases under investigation as of July 13, 2026 . This is substantially higher than the 249 cases reported by this same time in 2025 . Cases have been confirmed in 34 states, with 141 hospitalizations and zero deaths reported . The outbreak has been linked to iceberg lettuce sourced from central Mexico and served at Taco Bell locations, though other clusters are under investigation .

Quick Facts

What Is Cyclosporiasis?

Cyclosporiasis is an intestinal illness caused by the microscopic parasite Cyclospora cayetanensis . People become infected by consuming food or water contaminated with the parasite, typically fresh produce that has not been adequately washed or cooked .

What it is: This is a gastrointestinal infection caused by a single-celled parasite that invades the cells lining the intestines and rapidly multiplies, damaging tissue . It is not a virus or bacteria—it is a parasite that requires specific conditions to become infectious.

Who qualifies: Anyone can be infected. All ages are at risk, from 2 to 95 years (median age 44), with 56% of cases in females .

Why it matters: Without treatment, symptoms can last for weeks or months, following a relapsing course. Severe cases can lead to hospitalization (9% of confirmed cases) and complications . For Veterans and service members, a prolonged illness can affect duty status, training, and readiness.

What to do next: If you develop prolonged watery diarrhea lasting more than a few days, contact your healthcare provider and specifically request Cyclospora testing—routine stool tests often do not detect it .

2026 Outbreak Statistics

National Case Count

Source: CDC, as of July 13, 2026 

The outbreak has expanded significantly beyond initial reports. The total number of people sickened is likely higher than official tallies because many recover without seeking medical care <span class=””>.

Outbreak Linked to Taco Bell

As of July 23, 2026, the CDC identified 1,947 cases linked specifically to Taco Bell restaurants across nine states . The affected states are:

The affected states are now reporting over 12,000 cases of cyclosporiasis so far this summer .

Source Identification

The FDA’s traceback investigation has identified Taylor Farms de Mexico as the primary supplier of contaminated iceberg lettuce . On July 17, 2026, Taylor Farms de Mexico recalled all iceberg lettuce sourced from central Mexico .

• 90% of interviewed cases reported eating iceberg lettuce at Taco Bell 

• Lettuce was served at restaurants and also sold to consumers through retailers like Walmart

• The FDA is continuing traceback investigations on multiple produce items, including lettuce 

Mexico health officials tested samples from the Taylor Farms plant in Guanajuato and reported they did not detect the parasite in lettuce or water samples. The investigation into how contamination occurred continues .

Symptoms of Cyclosporiasis

Symptoms typically begin about one week after exposure (range: 2 to 14 days) .

Primary Symptoms

• Watery diarrhea — can be frequent and sometimes explosive 

• Loss of appetite

• Weight loss

• Bloating

• Nausea

• Fatigue

Less Common Symptoms

• Low-grade fever

• Vomiting

• Abdominal cramping

Duration and Complications

Without treatment, symptoms can persist from a few days to a month or longer, often following a “remitting-relapsing” pattern (symptoms improve, then return) . Complications include:

• Malabsorption (nutrients not properly absorbed)

• Cholecystitis (gallbladder inflammation)

• Reactive arthritis

How Cyclospora Spreads

The Parasite Life Cycle

Cyclospora reproduces through microscopic structures called oocysts that are shed in human stool . These oocysts are not immediately infectious. They must mature (sporulate) in warm environments (22°C to 32°C) for 1-2 weeks, which is why outbreaks peak in summer .

Routes of Transmission

Foodborne Transmission (Primary):

• Contaminated fresh produce (lettuce, basil, cilantro, raspberries, snow peas)

• Produce irrigated or washed with contaminated water

• Produce handled by workers without access to toilets

Waterborne Transmission:

• Drinking or swimming in contaminated water

Person-to-Person Spread:

• Not usually spread directly from person to person 

• The parasite requires time outside the body to become infectious

Why Outbreaks Are Growing

Joel Barratt, a molecular parasitologist at Emory School of Medicine, notes that outbreaks “seem to be getting larger year by year” . Climate change, creating warmer environments for the parasite’s oocysts to mature, may be a contributing factor . The parasite’s reach is also expanding beyond tropical regions where it was historically endemic .

Protection and Prevention

Safe Food Handling

Wash fresh produce thoroughly under running water before eating, cutting, or cooking . This reduces, but does not eliminate, the risk of infection.

Cook produce to 158°F (70°C) or higher — this kills the parasite .

Avoid recalled products: Do not eat recalled iceberg lettuce from Taylor Farms de Mexico. If you purchased recalled lettuce, throw it out or return it to the store .

Follow safe food handling practices: Wash hands, cutting boards, and surfaces after handling raw produce.

For Military Families

On-base dining facilities and commissaries follow CDC guidance. If you have concerns about food sources, check with your installation’s public health office.

When to See a Doctor and How to Get Tested

Seek Medical Care If You Have:

• Watery diarrhea lasting more than a few days

• Diarrhea with severe loss of appetite or fatigue

• Symptoms that improve then return

Testing

Standard ova and parasite (O&P) exams may not reliably detect Cyclospora . You must specifically request Cyclospora testing from your healthcare provider . Molecular testing (where available) is more sensitive .

Treatment

• Antibiotic: Trimethoprim-sulfamethoxazole (Bactrim) is the recommended treatment for patients aged 2 months and older 

• Hydration: Stay well-hydrated to replace fluids lost from diarrhea

• Avoid preparing food for others while acutely ill

What Veterans Should Do

If you are a Veteran receiving care through the VA healthcare system, you have access to diagnostic testing. Follow these steps:

1. Contact your VA provider<span class=””> if you develop prolonged watery diarrhea

2. Specifically request Cyclospora testing — it is not part of routine stool panels

3. Report your food history — what and where you ate in the 2 weeks before symptoms

4. Stay hydrated and follow treatment recommendations

VA facilities and community care providers are aware of the outbreak and can order appropriate testing.

Comparison: Reported Cases by Year

Source: CDC surveillance data 

Common Questions

1. What is Cyclospora?

Cyclospora is a microscopic parasite that causes intestinal illness (cyclosporiasis). It is found in contaminated food and water, not spread person-to-person .

2. What are the symptoms of Cyclospora infection?

The most common symptom is watery diarrhea, which can be frequent and explosive. Other symptoms include loss of appetite, weight loss, bloating, nausea, and fatigue. Symptoms start 2-14 days after exposure .

3. How do I get tested for Cyclospora?

You must specifically request Cyclospora testing from your healthcare provider. Routine stool tests often do not detect it. Molecular testing is more sensitive when available .

4. What is the treatment for Cyclospora?

Trimethoprim-sulfamethoxazole (Bactrim) is the recommended treatment for confirmed cases in patients aged 2 months and older .

5. Is the 2026 Cyclospora outbreak linked to Taco Bell?

Yes. As of July 23, 2026, 1,947 cases have been linked to Taco Bell restaurants across nine states. The FDA traced the source to Taylor Farms iceberg lettuce from central Mexico .

6. What states are affected by the Taco Bell outbreak?

Nine states: Indiana, Kentucky, Michigan, Ohio, West Virginia (initial five), plus Illinois, Kansas, Oklahoma, and Pennsylvania (added July 23) .

7. Is Cyclospora spread from person to person?

No. Cyclospora is not usually spread directly from person to person. The parasite requires time outside the body to become infectious .

8. How can I prevent Cyclospora infection?

Wash fresh produce thoroughly under running water, cook produce to 158°F (70°C), and avoid recalled products. Do not eat recalled Taylor Farms iceberg lettuce .

9. How many Cyclospora cases have been reported in 2026?

As of July 13, 2026, CDC has received reports of 1,645 confirmed domestic cases and is aware of more than 5,100 additional cases under investigation .

10. Has anyone died from the 2026 Cyclospora outbreak?

No deaths have been reported in the 2026 outbreak .

Key Takeaways

• The 2026 Cyclospora outbreak is the largest in U.S. history, with 1,645 confirmed cases and 5,100+ under investigation across 34 states .

• The outbreak is linked to Taylor Farms iceberg lettuce sourced from central Mexico, served at Taco Bell restaurants and sold in retail stores <span class=””>.

• Symptoms include prolonged watery diarrhea, nausea, fatigue, and weight loss<span class=””>, beginning 2-14 days after exposure .

• Routine stool tests may not detect Cyclospora — you must specifically request testing from your healthcare provider .

• Treatment with trimethoprim-sulfamethoxazole (Bactrim) is effective for confirmed cases .

• No deaths have been reported, though 9% of confirmed cases required hospitalization .

• The parasite is not spread person-to-person — the source is contaminated food or water .

• Veterans receiving VA healthcare should contact their provider and request testing if they have prolonged diarrhea symptoms.

• The FDA and CDC continue investigating additional clusters of cyclosporiasis .

Official Resources

• CDC Cyclosporiasis Information: CDC.gov/cyclosporiasis

• CDC Health Alert Network (HAN) Advisory: CDC.gov/han

• FDA Food Safety Information: FDA.gov/food

• Cyclosporiasis Outbreak Investigation: CDC.gov/cyclosporiasis/outbreaks/07-26/investigation.html

• VA Healthcare Resources: VA.gov/health-care