Cyclospora Outbreak 2026: What Parents Need to Know About the Surging Produce-Linked Health Alert

What Is Cyclospora?

Cyclospora cayetanensis is a microscopic parasite that causes an intestinal illness called cyclosporiasis. Unlike many stomach bugs that spread from person to person, Cyclospora is almost always spread by eating food or drinking water contaminated with the parasite — it does not spread easily through casual contact between children at school or daycare. In the U.S., outbreaks are strongly tied to fresh produce, especially imported herbs, leafy greens, and certain vegetables.

In this year's outbreak, illness onset dates range from May 1 through at least early July 2026, with patients ranging in age from 5 to 86 (median age 44–45) and about 56–59% female — consistent with the typical springtime and summer pattern for this parasite, which tends to peak between May and August.

How Big Has This Become?

This outbreak is substantially larger than in prior years. At the same point in 2025, CDC had recorded 249 national cases. As of mid-July 2026:

• ~7,000 total estimated cases (1,645 CDC lab-confirmed; 5,100+ additional cases under review)
• 34 states with reported cases
• 141 hospitalizations (approximately 9% of confirmed cases)
• No deaths reported
• Michigan has reported 3,762 cases and 44 hospitalizations (as of July 9)
• A separate multistate Midwest cluster spans Michigan, Ohio, West Virginia, and Kentucky

These numbers are preliminary and updated frequently by the CDC. We will continue to monitor and update this page as new information becomes available.

What Foods Are Suspected Right Now?

Investigators from the FDA and CDC have significantly updated their focus since this outbreak began. Lettuce and salad greens are now the primary suspected source of this outbreak, a shift from the earlier focus on cilantro and onions. Additionally, Taco Bell is being investigated as a potential common link in the Midwest cluster, though no single confirmed source has been announced and no recall has been issued.

We recommend extra caution with the following until the investigation concludes:

• Lettuce and salad greens (especially bagged salad kits and pre-washed mixes)
• Fresh cilantro
• Fresh basil
• White and green onions
• Cucumbers

Cyclospora outbreaks in past years have also been linked to raspberries, snow peas, and bagged salad mixes. If your family regularly uses these ingredients, consider cooking them or limiting raw consumption — especially for young children, older adults, and anyone with a weakened immune system.

Why This Matters for Kids

Children are exposed to Cyclospora the same way adults are — by eating contaminated raw produce. That means a child snacking on salad at home, eating a salad-bar lunch at school or camp, or having a fast-food meal with lettuce faces the same risk as any adult in the household. Children with weakened immune systems are at particular risk for a longer, more severe, or relapsing course of illness if infected, so extra caution with the produce categories above is especially important for immunocompromised kids.

Signs and Symptoms in Children

Symptoms typically begin about 7 to 10 days after exposure (though it can range from 2 days to 2 weeks or more), which often makes it hard for families to connect the illness back to a specific meal. Watch for:

• Watery diarrhea, which can be frequent and explosive
• Loss of appetite
• Stomach cramps and bloating
• Nausea (vomiting is less common)
• Fatigue and low energy
• Low-grade fever
• Weight loss, especially if illness is prolonged

Without treatment, symptoms can go on for weeks and may even seem to improve and then return in cycles. This is one of the more distinctive features of cyclosporiasis compared to typical viral stomach bugs, which usually resolve within a few days.

When to Call Us Right Away

Please contact our office if your child has diarrhea lasting more than a few days, or right away if they:

• Show signs of dehydration (no wet diapers in 8 hours, dry mouth, no tears when crying, sunken eyes)
• Have diarrhea that persists longer than 3–5 days
• Have blood in their stool
• Have a fever above 102°F
• Seem unusually lethargic or difficult to console
• Have eaten lettuce, salad greens, or any of the produce items listed above recently

Diagnosis Requires a Specific Test

Cyclospora is easy for standard stool cultures to miss. Many routine stool panels and standard diarrhea tests are not designed to detect this particular parasite, so if we suspect cyclosporiasis based on your child's symptoms and history, we will specifically request a modified acid-fast staining or PCR-based stool test. Be sure to tell us about any recent salads, fresh herbs, or produce — and mention if your family has recently eaten at a fast-food restaurant — so we can guide testing appropriately.

Treatment

Cyclosporiasis can be treated with an antibiotic prescribed by your doctor. Most children recover fully with appropriate treatment. Supportive care — plenty of fluids and rest — is important throughout recovery, since diarrheal illness can lead to dehydration. If you think your child may be infected, please call our office so we can guide next steps.

How to Protect Your Family During the Outbreak

• Be cautious with raw lettuce and salad greens — the primary suspected source right now; consider avoiding raw salads for young children and immunocompromised family members until the source is confirmed
• Cook produce when possible — cooking to 158°F / 70°C kills the parasite, so cooked greens and vegetables are safe
• Know that washing alone isn't enough — don't rely on rinsing or "pre-washed" labeling to guarantee safety during this outbreak
• Be mindful of restaurant salads — given Taco Bell's investigation, extra caution with fast-food salads and items with fresh lettuce or greens is reasonable while the outbreak is active
• Watch for prolonged GI symptoms — especially watery diarrhea lasting several days, which is different from a typical 24–48 hour stomach virus
• Stay current on recalls — visit the CDC's outbreak investigation page and the FDA's outbreak page for updates as the traceback investigation progresses

A Note from Our Team

This outbreak is moving fast — numbers have jumped more than tenfold since early June, and the suspected source has shifted from herbs to lettuce and salad greens. We'll continue to monitor updates from the CDC and FDA and update this page as the investigation develops. If you have any questions or concerns about your child's symptoms, please don't hesitate to call our office.