Cyclospora Outbreaks Surge Across the U.S. as Michigan Cases Top 1,200

The 2026 Cyclospora season has become one of the most important foodborne illness stories in the country. As of July 9, the Michigan Department of Health and Human Services reports 1,251 cyclosporiasis cases in Michigan during the outbreak investigation period, and the source has not been identified. At the same time, Ohio has reported a sharp rise in cases, CDC is tracking domestically acquired cases across multiple states, and FDA is investigating several Cyclospora clusters involving not-yet-identified foods.

For people who are sick, the uncertainty is frustrating. Cyclospora can cause prolonged, relapsing diarrhea that makes it difficult to work, travel, care for family, or keep up with normal life. For investigators, the challenge is different: they need to connect patients, foods, restaurants, grocery stores, distributors, and suppliers before records fade and perishable produce disappears from the marketplace.

Pritzker Hageman’s Cyclospora lawyers are monitoring these investigations closely. Our food safety team has represented clients in Cyclospora outbreaks linked to restaurants, grocery stores, bagged salad, vegetable trays, herbs, berries, and other fresh produce.

Michigan is the center of the current surge

Michigan’s outbreak has moved quickly. MDHHS first announced the outbreak on July 1 after more than 170 cases were reported in nine days. The official daily state count has now climbed to 1,251 cases. The source remains unknown, and MDHHS says it continues to work with local health departments and partners to investigate cases and provide updates.

The outbreak is especially important because Michigan typically identifies far fewer cyclosporiasis cases in a full year. MDHHS says the recent outbreak period count includes cases reported during the investigation period and may change as more information becomes available. That matters for readers because the number is not final, and it may change after cases are investigated, confirmed, reclassified, or linked to different exposures.

Health officials are focusing on fresh produce precautions while the investigation continues. MDHHS recommends additional steps for restaurants, commercial kitchens, and other entities preparing or serving raw produce in Southeast Michigan, including using whole heads of lettuce instead of prewashed bagged lettuce or salad mixes, removing the outer two to three leaves, washing remaining leaves, and cooking leafy greens when possible.

Ohio and other states are also seeing increased Cyclospora activity

The outbreak picture does not stop at the Michigan border. Ohio has reported a major increase, particularly in the northwest part of the state. An Ohio-focused report citing the Ohio Department of Health said Ohio had 177 cases as of July 2, including 28 hospitalizations and no deaths. The Associated Press later reported that Lucas County had 306 cases and Northwest Ohio had more than 500.

The relationship between the Michigan and Ohio cases is one of the key questions. Public health investigators will look for overlapping foods, shared distributors, restaurant supply chains, grocery suppliers, travel, catered events, and produce distribution patterns. A single contaminated ingredient can show up in many different places, including fast food, full-service restaurants, grocery stores, workplace cafeterias, hospitals, nursing homes, schools, and catered meals.

CDC’s national surveillance page also shows that Cyclospora is not limited to one state. But CDC is careful about interpretation: it says there is currently no evidence of one single multistate Cyclospora outbreak linking all cases. Instead, CDC describes a surveillance count across the country while public health agencies investigate potential clusters and sources. That means the U.S. situation may involve one large outbreak, several separate outbreaks, a mix of outbreak cases and sporadic cases, or a picture that will become clearer only after traceback work is done.

FDA is investigating several Cyclospora clusters with unknown food sources

The FDA CORE outbreak table is important because it shows what federal traceback investigators are actively working on. FDA added Cyclospora reference 1385 and reference 1384 on July 8, both linked to not-yet-identified products, and FDA initiated traceback. FDA also lists Cyclospora reference 1381 from June 17 and reference 1375 from June 3, both involving not-yet-identified products.

Those entries should be interpreted carefully. FDA explains that its outbreak investigations are in different stages and that investigations without specific, actionable consumer steps may or may not identify a source. FDA also says it will not publicly name a specific product until there is sufficient evidence to implicate that product as a cause of illness.

For consumers, this means there may be no recall yet even when public health agencies are doing serious traceback work. For potential legal claims, it means evidence preservation is critical. Receipts, loyalty-card records, delivery-app orders, credit-card statements, product labels, restaurant receipts, and health department interviews can become important if FDA, CDC, or state investigators later identify a food source.

What the Taco Bell reports may mean

WWJ/Audacy reported that some Metro Detroit Taco Bell locations posted notices saying they were unable to sell lettuce, cilantro onion, pico de gallo, and guacamole because of a nationwide recall. People later reported the same ingredient removals and said Taco Bell did not immediately respond to a request for comment. WWJ also reported that it was unclear whether anyone who ate at Taco Bell had become sick.

The ingredient list is significant because it fits the pattern public health agencies are already investigating: raw produce served without a kill step. Lettuce, fresh herbs, onions, pico de gallo, and guacamole all involve perishable supply chains, foodservice distribution, and potential ingredient-level sourcing questions. If a chain restaurant removes several fresh produce ingredients at once, that may reflect a supplier instruction, a broader market withdrawal, a local health recommendation, or a conservative corporate safety decision. The public reports do not establish which of those explanations is correct.

That distinction matters. A restaurant notice can be a meaningful clue without being proof of causation. FDA’s outbreak table still lists Cyclospora products as “Not Yet Identified,” and FDA explains that it will not publicly name a specific product until there is sufficient evidence to implicate that product as a cause of illnesses or adverse events. FDA’s CORE outbreak table therefore remains the best public source for whether federal investigators have identified a food vehicle.

For potential clients and outbreak investigators, the practical takeaway is preservation. Anyone diagnosed with Cyclospora who ate at Taco Bell during the exposure window should save receipts, app orders, credit-card records, photos of posted notices, packaging, store location information, and notes about the exact menu items ordered. That does not mean Taco Bell caused the illness. It means those details may become important if public health agencies later connect an ingredient, supplier, distributor, or restaurant chain to one of the Cyclospora clusters.

Why Cyclospora outbreaks are so difficult to solve

Cyclospora outbreaks are often harder to solve than outbreaks involving more familiar pathogens such as Salmonella or E. coli. The FDA fresh produce overview explains that cyclosporiasis is caused by the parasite Cyclospora cayetanensis, that humans are the only known host, and that outbreaks have been associated with fresh fruits and vegetables.

One difficulty is the parasite’s life cycle. FDA says the parasite must be shed by an infected person and remain in the environment for one to two weeks before becoming infective. CDC likewise explains that direct person-to-person spread is unlikely because Cyclospora must mature outside the host before it can infect another person.

Another difficulty is produce itself. Fresh produce is perishable, may be eaten raw, may move through complex supply chains, and may be mixed with other ingredients before a patient ever sees it. A small amount of cilantro, basil, green onion, lettuce, or berries may be used in many recipes. Patients may remember the restaurant or grocery store but not the garnish, herb blend, salsa, salad mix, or topping.

Testing also complicates the picture. The CDC clinical overview says testing for Cyclospora is not routinely conducted in most U.S. laboratories and healthcare providers may have to specifically request it. The MDHHS provider bulletin adds that standard microscopy can have lower sensitivity due to low oocyst shedding and that molecular testing may be more sensitive.

Finally, the outbreak source may never be identified publicly. The AP reports that Cyclospora investigations can take months and sometimes never find a clear source. That is why every diagnosed patient interview matters. One person’s food history may not solve the outbreak, but dozens or hundreds of detailed interviews can reveal a common product, distributor, restaurant chain, grocery supplier, or growing region.

Fresh produce has been the recurring theme in Cyclospora outbreaks

Past Cyclospora outbreaks have repeatedly involved fresh produce. FDA lists fresh fruits and vegetables as common outbreak vehicles and notes that chlorine and other common antimicrobial chemical treatments are not effective against Cyclospora. Public health agencies have previously investigated outbreaks linked to produce such as raspberries, basil, cilantro, snow peas, bagged salad mixes, lettuce, parsley, and vegetable trays.

Pritzker Hageman has written about many of these issues, including Cyclospora food poisoning from produce, Cyclospora from basil, and the 2020 Fresh Express bagged salad Cyclospora outbreak. The firm has also represented clients in major fresh produce outbreaks involving restaurants, retailers, processors, and distributors.

FDA’s Cyclospora Prevention, Response and Research Action Plan explains that reported U.S. cases have been rising in recent years, likely due in part to better diagnostic testing, and that public health authorities have confirmed more domestically acquired cases traced to both domestic and imported produce.

Cyclospora symptoms can last weeks and may relapse

Cyclospora infects the small intestine and typically causes watery diarrhea with frequent, sometimes explosive bowel movements. The CDC clinical overview lists common symptoms that can include loss of appetite, weight loss, stomach cramps, bloating, gas, nausea, and prolonged fatigue. Other symptoms can include vomiting, body aches, headache, low-grade fever, and flu-like symptoms.

Symptoms usually begin about one week after exposure, but CDC says the incubation period can range from two days to two weeks or more. If untreated, illness may last from a few days to a month or longer and may seem to improve and then come back. That relapsing pattern is one reason some patients delay getting tested, and one reason providers may not immediately suspect Cyclospora.

Dehydration can become serious, especially for young children, older adults, and people with weakened immune systems. People with persistent diarrhea should seek medical care and ask whether Cyclospora testing is appropriate.

Diagnosis matters because not every stool test looks for Cyclospora

A key practical point for patients is that a routine stool test may not include Cyclospora unless the provider or laboratory specifically orders it. The CDC says testing for Cyclospora is not routinely conducted in most U.S. laboratories. MDHHS advises providers not to rely on standard ova and parasite orders unless they confirm Cyclospora is included.

Patients with sudden, ongoing diarrhea during this outbreak should tell their provider about possible Cyclospora exposure and ask whether stool testing should specifically include Cyclospora. A positive laboratory result matters medically because cyclosporiasis has a specific preferred treatment. It can also matter legally because a confirmed diagnosis is often one of the most important pieces of evidence in a food poisoning claim.

How is cyclosporiasis treated?

The CDC clinical care guidance states that trimethoprim-sulfamethoxazole, often called TMP-SMX, is the treatment of choice for cyclosporiasis. CDC also notes that most healthy people eventually recover without treatment, although illness may be prolonged. Treatment decisions should be made by a healthcare provider, especially for patients with medication allergies, pregnancy concerns, kidney disease, immune system issues, dehydration, or other medical risks.

What should people do if they may be part of a Cyclospora outbreak?

1. Get medical care and ask about Cyclospora testing. Tell the healthcare provider about the current outbreak activity and ask whether the stool order specifically targets Cyclospora.
2. Report a positive diagnosis. Local and state health departments need patient interviews to identify common foods, restaurants, stores, events, suppliers, and distributors.
3. Write down a detailed food history. Include salads, leafy greens, herbs, berries, green onions, fresh produce, grocery store purchases, restaurants, fast food, catering, delivery-app orders, workplace meals, school meals, hospital or nursing-home meals, parties, and travel during the 14 days before symptoms began.
4. Save records. Keep medical records, test results, prescriptions, discharge papers, bills, missed-work records, receipts, grocery loyalty records, restaurant receipts, delivery orders, credit-card statements, product photos, packaging, and texts or emails about illness.
5. Do not rely on memory alone. Produce cases often turn on small details such as a garnish, side salad, berry topping, salsa, herb blend, lettuce supplier, or foodservice distributor.
6. Talk to an experienced Cyclospora attorney before evidence disappears. A lawyer can help identify stores, restaurants, suppliers, corporate records, traceback evidence, and public health documents that may link a diagnosed illness to a legally responsible company.

Can people sue for Cyclospora food poisoning?

A Cyclospora lawsuit may be possible if evidence connects a diagnosed illness to contaminated food sold or served by a company. In many cases, the strongest claims involve a positive stool test, compatible symptom timing, a food exposure that matches the outbreak investigation, and records showing where the person bought or ate the implicated food.

Potential defendants can include produce growers, packing houses, processors, distributors, wholesalers, grocery chains, restaurants, caterers, institutional foodservice companies, and other businesses in the supply chain. The legal theory depends on the facts, but contaminated food cases often focus on whether a company sold unsafe food and whether that food caused the client’s illness.

Our pages on suing for Cyclospora from produce, suing a grocery store for Cyclospora, and restaurant food poisoning lawsuits explain these issues in more detail. Pritzker Hageman’s food poisoning attorneys work with epidemiologists, microbiologists, traceback specialists, and public health evidence to prove outbreak claims.

Why this outbreak is legally and epidemiologically important

This outbreak is important because it is large, fast-moving, and still unsolved. Michigan’s official count has already passed 1,200 cases. Ohio reports show significant illness activity, especially near the Michigan border. FDA is conducting traceback on multiple Cyclospora clusters with not-yet-identified products. CDC says several clusters are under investigation and cautions that the national surveillance count does not prove one single multistate outbreak.

That uncertainty does not mean there is no case. It means the evidence is still developing. In foodborne illness litigation, the early days of an outbreak are often when the most important evidence is created or lost. Patients are being tested. Health departments are conducting interviews. Restaurants and retailers are adjusting fresh produce handling. Suppliers are checking records. Traceback investigators are looking for common distribution points. The people who save records now are often in a better position if public health officials later identify a specific source.

It is also important not to jump to unsupported conclusions. The Taco Bell reports belong in the article because they may be relevant to the traceback picture, especially if several fresh produce items were pulled at once. But they should be framed as a reported produce-removal event, not as a confirmed source. The legally safer and more accurate wording is that no public health agency has yet identified Taco Bell, a Taco Bell supplier, or any specific Taco Bell ingredient as the cause of the outbreak.

How to reduce risk while the source remains unknown

The most protective step is to avoid food or water that may be contaminated. Because the specific source has not been identified, public health agencies are emphasizing practical produce precautions. MDHHS recommends cooking produce when possible because heating food to 158 degrees Fahrenheit or higher kills Cyclospora. MDHHS also recommends buying whole heads of lettuce rather than prewashed bagged lettuce or salad mixes during the investigation, removing the outer two to three leaves, and washing the remaining leaves under running water.

For cilantro and basil, MDHHS recommends separating leaves and washing thoroughly under running water, with cooking as the safest option. For green onions, trim the root end, remove the outer layer, and wash thoroughly. For raspberries, MDHHS notes that the surface is difficult to clean and suggests cooked raspberries, such as in pies or jams, or frozen raspberries as alternatives, while cautioning that freezing may reduce but does not eliminate the parasite. For snow peas, wash under running water while rubbing the surface, and cook when possible.

CDC prevention guidance also recommends washing hands before and after handling raw fruits and vegetables, washing produce under running water before eating, cutting, or cooking, scrubbing firm produce with a clean brush, cutting away damaged areas, and refrigerating cut, peeled, or cooked produce promptly. These steps reduce risk, but they do not guarantee safety if a product is already contaminated.

Cyclospora outbreak FAQ

Experienced Cyclospora lawyers

Pritzker Hageman is a national food safety law firm that represents people sickened in foodborne illness outbreaks. Our lawyers have handled Cyclospora cases involving restaurants, grocery stores, multi-state retailers, produce distributors, and fresh produce suppliers. We know how to work with public health evidence, product traceback, microbiology, food histories, and corporate records.

If you were diagnosed with cyclosporiasis after eating fresh produce, restaurant food, fast food, catered food, or grocery-store food, contact our food poisoning attorneys for a free consultation. Call 1-888-377-8900, text 612-261-0856, or contact Pritzker Hageman online.