Two people have died from cyclospora infections in Michigan, marking the first U.S. deaths from the intestinal parasite as a nationwide outbreak surges past 20,000 cases—a crisis that's exposing critical weaknesses in the food safety system.
The Michigan Department of Health and Human Services announced the deaths Monday, noting both victims had underlying health conditions that may have been worsened by the severe intestinal illness and dehydration caused by the microscopic parasite. The department declined to release additional information about the deaths.
The tragedy comes as federal health officials struggle to contain what's become the largest cyclospora outbreak in U.S. history. More than 18,000 confirmed or suspected cases have been reported nationwide, according to the Centers for Disease Control and Prevention, though state reports suggest the actual number exceeds 20,000. That's more than four times the previous record of roughly 4,700 cases set seven years ago in 2019.
Who Bears the Burden
Dr. Joel Kammeyer, division chief of infectious diseases at Wayne State University and the Detroit Medical Center, called the deaths a "tragedy" while acknowledging that vulnerable populations face disproportionate risks. "For someone who comes into an urgent care and cyclosporiasis is their only issue, it's relatively easy to treat," Kammeyer said. But for people already struggling with other illnesses, "it stands to reason that there are some patients that might not be able to withstand the dehydration that can come with severe cyclosporiasis."
Cyclospora is a heat-loving parasite that infects the bowels and spreads through feces. It commonly causes watery diarrhea "with frequent and sometimes explosive bowel movements," according to the CDC. Outbreaks tend to occur most often in late spring and summer.
The illness hits hardest at those least able to weather it—people with compromised immune systems, chronic conditions, or limited access to prompt medical care. While the CDC says cyclosporiasis is rarely deadly, the current outbreak has sent at least 98 people to hospitals.
The Source Problem
Federal health officials have traced part of the outbreak to lettuce from Mexico served at Taco Bell locations in nine states. As of late July, that single source accounted for 1,947 cases and at least 98 hospitalizations, according to the CDC.
But the agency has warned that other "brands, restaurants, retailers, or distribution channels" could be tied to the outbreak as the investigation continues—suggesting the contamination may be far more widespread than initially understood.
People have been infected in the past by consuming fruits or vegetables exposed to feces-contaminated irrigation water. The pathway from farm to table remains a regulatory challenge, particularly for produce imported from countries with different agricultural standards.
A Growing Pattern
Cyclosporiasis is less common than other foodborne illnesses like salmonella and E. coli. Many cases are never linked to a specific food or source. For years, few U.S. cyclospora outbreaks were reported. But the number started rising about a decade ago, with a particularly notable spike in 2018 and 2019.
The current surge dwarfs anything that's come before, raising questions about whether inspection regimes and supply chain oversight have kept pace with the expanding global food system.
Why This Matters:
These deaths underscore how foodborne illness outbreaks don't affect everyone equally—they hit vulnerable populations hardest, turning what's "relatively easy to treat" for healthy people into a life-threatening crisis for those with underlying conditions. The scale of this outbreak, more than quadruple the previous record, suggests systemic failures in food safety oversight, particularly for imported produce. With contamination sources still being identified weeks into the crisis, the current regulatory framework appears insufficient to protect public health in an increasingly complex, globalized food supply chain. The deaths in Michigan reveal the human cost of those gaps—and the urgent need for stronger inspection standards, better coordination between federal and international food safety authorities, and resources to ensure that agricultural practices abroad meet the standards Americans expect when they sit down to eat.