Florida Cyclospora Cases Pass 400 as State Health Reports Track a Lettuce-Linked Outbreak

Florida has recorded 417 confirmed or suspected cases of cyclosporiasis between January 1 and August 8, according to the state's weekly reportable disease surveillance, as a parasitic infection linked by federal investigators to imported iceberg lettuce continues to spread through the summer months.

The weekly pace has not slowed. State reporting added 66 cases in the most recent week covered, and an earlier August report showed nearly 100 new cases in a single reporting period. The bulk of Florida's 2026 cases have been logged in June, July and August, a seasonal pattern consistent with how cyclosporiasis has historically behaved in the United States.

The Centers for Disease Control and Prevention has linked the broader outbreak to iceberg lettuce produced in central Mexico. Nationally, the agency has counted 13,895 laboratory-confirmed cases since May 1, including 740 hospitalizations and two deaths, making this one of the larger foodborne parasitic outbreaks recorded in recent U.S. history.

What cyclosporiasis is

Cyclosporiasis is caused by Cyclospora cayetanensis, a microscopic parasite that infects the small intestine. It is not transmitted person to person in the way that norovirus or influenza are. Infection occurs when someone consumes food or water contaminated with the parasite in a form that has had time to become infectious after leaving a host.

That transmission route is why fresh produce is the recurring vehicle. Leafy greens, herbs such as basil and cilantro, berries and snow peas have all been implicated in past U.S. outbreaks, and the parasite is not reliably eliminated by the washing and rinsing steps used in commercial produce handling or home kitchens.

Symptoms typically begin about a week after exposure and center on watery diarrhea that can be prolonged and relapsing. Fatigue, loss of appetite, weight loss, cramping, nausea and low-grade fever are also common. Untreated infections can persist for weeks or months, and relapse after apparent recovery is a known feature of the illness.

The illness responds to a specific antibiotic regimen, which is why laboratory confirmation matters. Cyclospora is not detected on standard stool culture panels; clinicians must request testing specifically for it, and that testing requirement is one reason case counts in any outbreak are understood to undercount actual infections.

Where Florida's cases are concentrated

The Suncoast has drawn particular attention. State reporting through August 8 showed 11 cases in Manatee County and five in Sarasota County for a combined 16 in those two counties, and regional coverage has tracked the count climbing week over week through the summer.

Lee County has led Southwest Florida in case counts according to reporting on the state's August surveillance data. The distribution across Florida's other counties has followed population density and, to a degree, the distribution of restaurants and institutional food service where a single contaminated shipment can generate a cluster.

Public health officials have also flagged concurrent salmonella activity in the Sarasota and Manatee area, raising broader food safety questions in a region where local agriculture, farmers markets and a large seasonal population all intersect. Local produce growers have reported fielding increased customer questions as the case counts have risen.

What the state and federal response looks like

Florida tracks cyclosporiasis as a reportable condition, which obligates laboratories and clinicians to notify county health departments when a case is confirmed. Those reports feed the weekly surveillance summaries that produce the running case count, and county epidemiologists conduct interviews to identify shared food exposures.

The traceback work sits primarily with federal agencies. The CDC coordinates the epidemiological investigation across states, and the Food and Drug Administration handles the supply chain tracing that connects clusters of illness to specific growers, packing houses and distribution lots. That process is slow by design, because a false attribution damages growers who were not the source.

The identification of central Mexico iceberg lettuce as the implicated commodity reflects that traceback work. Iceberg lettuce is a high-volume import into the United States during periods when domestic production is limited, and it moves through food service supply chains in quantities that can distribute contamination across many states before illness reports accumulate.

What Floridians should know

Cooking kills the parasite. Produce that is cooked thoroughly does not pose a cyclospora risk, which is the single most reliable protective step available to consumers during an outbreak linked to a raw commodity.

Washing helps but does not guarantee safety. Public health guidance during cyclospora outbreaks has consistently noted that rinsing fresh produce reduces but does not eliminate risk, because the parasite can adhere to surfaces in ways that ordinary washing does not dislodge. Consumers concerned about a specific implicated commodity have the option of avoiding it while an outbreak is active.

Anyone with prolonged or relapsing watery diarrhea, particularly lasting more than a few days, should contact a health care provider and mention the outbreak. Because standard testing panels do not detect Cyclospora, telling a clinician about possible exposure is what prompts the specific test that leads to the correct treatment.

Florida's large population of seasonal residents and visitors adds a wrinkle. People who become ill after eating in Florida may seek care in another state, and people who were exposed elsewhere may be counted in Florida's numbers, which is why state-level case counts in a multistate outbreak are useful for trend detection but imprecise as a measure of local transmission.

The wider food safety picture in Florida

Florida occupies an unusual position in the U.S. produce system. It is simultaneously a major agricultural producer, with substantial winter vegetable, citrus and specialty crop output, and a major import gateway, with fresh produce entering through South Florida ports and land crossings for distribution across the eastern United States.

That dual role means Florida consumers encounter a broad mix of domestic and imported produce, and it means Florida's food safety infrastructure carries a heavier load than population alone would suggest. The Florida Department of Agriculture and Consumer Services regulates food establishments in the retail grocery sector, while restaurant inspection falls to the Department of Business and Professional Regulation.

Tourism raises the stakes further. Florida hosts well over 100 million visitors annually, most of whom eat the large majority of their meals in commercial food service. A produce-linked outbreak that reaches restaurant supply chains in Orlando, Miami or Tampa Bay has amplification potential that a comparable outbreak in a less visited state does not.

Why case counts understate the outbreak

Every reported case of cyclosporiasis represents a chain of events that had to complete: a person had to become ill enough to seek medical care, a clinician had to suspect a parasitic cause, the correct test had to be ordered, the laboratory had to run it, and the result had to be reported to public health authorities.

Each link in that chain drops cases. Many people with diarrheal illness never seek care. Among those who do, most receive symptomatic treatment without testing. Among those tested, standard stool panels do not detect Cyclospora unless it is specifically ordered, which requires the clinician to consider it.

Public health researchers generally estimate that reported cases of foodborne illness represent a fraction of actual infections, with multipliers varying by pathogen and by how distinctive the symptoms are. For cyclosporiasis, the prolonged and relapsing course makes people more likely to eventually seek care than they would be for a short-lived illness, which improves detection relative to some other pathogens.

The practical consequence is that trends matter more than absolute numbers. A weekly count rising from the 60s into the 90s indicates the outbreak is accelerating, regardless of what the true underlying incidence is, because the detection process is roughly constant week to week.

The supply chain behind the outbreak

Fresh produce reaches American tables through a system built for speed and volume rather than for traceability, and that design is why foodborne outbreak investigations take weeks. A single lot of lettuce can be split among multiple distributors, repacked, combined with product from other sources and shipped to hundreds of destinations before anyone reports an illness.

Imported produce adds a layer. Product entering the United States passes through customs and Food and Drug Administration import processes, but inspection covers a small fraction of shipments, and pathogen contamination is not detectable by visual inspection in any case.

The Food Safety Modernization Act established preventive control and produce safety requirements intended to address contamination at the source, including standards for agricultural water quality, worker hygiene and equipment sanitation. Implementation across international supply chains has been uneven, and enforcement against foreign growers depends substantially on import controls rather than on direct inspection.

For Florida, which functions as both a major agricultural producer and a major produce import gateway, the outbreak illustrates a structural exposure. Product entering through South Florida moves into distribution networks that serve the entire eastern United States, and the state's own consumers are among the first to encounter anything contaminated.

What's next

Florida's weekly reportable disease surveillance will continue to publish updated case counts, and those releases are the most reliable near-term indicator of whether the outbreak is peaking. Cyclosporiasis cases in the United States have historically declined in the fall as the seasonal pattern breaks, but that decline has arrived at different times in different years.

The federal traceback investigation remains open, and further FDA action on specific growers or importers is possible. Any import alert or recall affecting the implicated commodity would move quickly through Florida's distribution network given the state's role as a port of entry.

Health officials in Manatee, Sarasota and Lee counties have been the most active in local communication, and county health department advisories remain the most locally specific source of guidance for residents in the affected areas. Statewide, the Florida Department of Health's disease reporting pages carry the running counts.