Cyclospora outbreak spreads across U.S. as officials probe food sources

What This is

• Cyclospora infections have surged across much of the U.S., with Michigan reporting thousands of illnesses and many other states reporting growing case counts.
• The CDC has reported 1,645 lab-confirmed cases and is reviewing about 5,100 additional possible cases, with more than 100 hospitalizations and no deaths reported in several updates.
• Investigators have not confirmed a single food source or supplier, and no specific product has been recalled in many reports.
• Michigan officials have said patient interviews suggest lettuce or salad greens as a leading possible exposure, but other foods are still being considered.
• The FDA is running traceback investigations on produce, including lettuce, to map where suspected items moved through the supply chain.
• Cyclosporiasis is an intestinal infection usually caught from food or water contaminated with feces, often involving raw fresh produce rather than direct person-to-person spread.
• Symptoms can include prolonged watery or “explosive” diarrhea, cramps, nausea, and fatigue, and some people—especially older adults and those with weakened immune systems—can face higher risk.
• Diagnosis often requires specific stool testing, and treatment is typically an antibiotic such as trimethoprim-sulfamethoxazole for people who can take it.
• Public-health advice has focused on safer produce handling and, in some places, avoiding pre-washed bagged lettuce and salad kits while the source is investigated.
• Taco Bell has temporarily removed some fresh ingredients at select locations as a precaution, while officials have not confirmed any link between the chain and the outbreak.

Why This Matters

• When officials cannot quickly identify the source, people and businesses are left guessing what foods to avoid, which can disrupt diets, restaurants, and produce sales.
• Large gaps between state counts and federal counts can erode trust and slow public guidance, because warnings and recalls depend on fast, reliable data.
• Foodborne parasites highlight weak points in a global produce supply chain, where contamination can happen far from where people get sick.
• Severe diarrhea illnesses hit some groups harder, including older adults and people with weakened immune systems, raising equity and safety concerns.