The Food and Drug Administration has identified 72 new cases of explosive diarrhea caused by the foodborne parasite Cyclospora, marking the sixth Cyclospora outbreak investigation the agency has opened this year. The FDA announced the new probe on Wednesday but withheld details on the specific locations of the cases or the potential food sources involved, stating only that a traceback investigation is currently underway.
This latest investigation adds to an unprecedented national surge in Cyclospora infections. The Centers for Disease Control and Prevention has already received reports of more than 11,500 cases across 41 states this year, a staggering figure that dwarfs the typical 2,000 to 5,000 cases the United States sees in an entire year. The rapid escalation of illnesses recorded just in the month of July greatly exceeds normal annual totals.
Cyclospora cayetanensis is a microscopic, unicellular parasite that causes an intestinal infection known as cyclosporiasis. People typically become infected by consuming food or water contaminated with feces. The infection is notorious for causing explosive, watery diarrhea, along with severe stomach cramps, bloating, and fatigue. Symptoms can last for weeks if left untreated with appropriate antibiotics.
National Surge in Cyclospora Outbreak Cases
Of the 11,500-plus reported illnesses, the CDC has confirmed 4,173 cases and classified over 7,400 as probable. The infections have resulted in 308 hospitalizations and zero deaths so far. Despite the alarming scale of the outbreak, Health Secretary Robert F. Kennedy Jr. told reporters earlier this week that the situation was “under control.” Kennedy, known for his anti-vaccine stance, now oversees the Department of Health and Human Services, which houses both the FDA and CDC.
The ongoing FDA investigation into the 72 new cases involves a traceback effort to identify the source of the unicellular parasite. However, the agency has not indicated whether this outbreak is connected to a previous Cyclospora outbreak linked to contaminated lettuce or if it stems from an entirely different food source. The FDA has also remained silent on whether the new cases overlap geographically with the previous outbreaks.
Previous Outbreak Linked to Taylor Farms Lettuce
Just last week, the FDA and CDC confirmed that an earlier Cyclospora outbreak was tied to shredded iceberg lettuce grown in Mexico and distributed by Taylor Farms. The contaminated lettuce was served at Taco Bell locations and sickened individuals across five states: Indiana, Kentucky, Michigan, Ohio, and West Virginia. Michigan has been hit particularly hard by the outbreak, reporting 7,664 cases and 106 hospitalizations as of July 23.
Taylor Farms issued a recall that led to the removal of Taylor Farms lettuce distributed to 27 states. However, consumer advocacy groups criticized the recall notice for being dangerously vague. It failed to specify exactly where the lettuce was sold or how consumers could effectively avoid it. The FDA later confirmed some of the contaminated lettuce went to Walmart stores. Media reports indicated the product also reached Jack in the Box restaurants, as well as major food distributors Sysco and US Foods. Some of the contaminated iceberg lettuce was also sold in blends mixed with romaine lettuce.
Agency Staffing Cuts and Open Investigations
The surge in foodborne illnesses comes at a time when the FDA and CDC are operating under significant constraints. Both agencies have been hit hard by budget and staffing cuts implemented by the Trump administration, raising concerns about their ability to manage multiple concurrent public health crises. When pressed for details about the new 72-case outbreak, neither the FDA, the CDC, nor the Department of Health and Human Services responded to requests for comment from multiple media outlets, including the New York Times.
Resource limitations are especially concerning given the sheer volume of current food safety threats. Beyond the six Cyclospora outbreaks identified this year, the FDA is simultaneously managing 10 other open investigations into foodborne outbreaks. These concurrent investigations involve pathogens including Salmonella, E. coli, Clostridium botulinum, and Listeria monocytogenes. Managing 16 active outbreak investigations simultaneously tests the limits of the agencies’ reduced workforce.
What Happens Next
As the FDA continues its traceback investigation into the 72 new cases, public health officials expect the national tally of Cyclospora infections to climb even higher. The peak season for the foodborne parasite typically aligns with the warmer summer months, meaning the crisis could easily worsen before it begins to subside. Identifying the specific food source for this sixth outbreak remains the top priority for investigators.
Consumers should remain vigilant about produce consumption, particularly leafy greens, and monitor updates from the FDA and CDC for specific product recalls. The ability of these federal health agencies to quickly identify and contain the source of this latest Cyclospora outbreak will be a critical test of their current operational capacity. With agency staffing diminished and case counts already far exceeding historical norms, the coming weeks will reveal whether the explosive diarrhea outbreak can truly be brought under control.
— Aisha Mensah, health desk, AXO News