If you bought a Marketside salad from Walmart in the past few weeks, check your refrigerator before your next meal. Nearly 2,000 people across nine states have been sickened by Cyclospora, a microscopic parasite traced to iceberg lettuce sourced from central Mexico, and Walmart is offering full refunds on recalled Marketside-branded salads that contained the contaminated produce.
The FDA’s outbreak investigation page, updated in late July 2026, lists 1,947 confirmed illnesses and 98 hospitalizations, with no deaths. Cases span Illinois, Indiana, Kansas, Kentucky, Michigan, Ohio, Oklahoma, Pennsylvania and West Virginia, with illness onset dates running from June 22 through July 20.
What Walmart shoppers should do right now
Walmart has pulled the affected Marketside salads from store shelves and says customers can return recalled products to any location for a full refund, even without a receipt. The recall covers salads containing iceberg lettuce distributed between June 29 and July 16, 2026. Anyone unsure whether their purchase falls within that window should err on the side of discarding it.
Cyclospora cayetanensis is a single-celled parasite, not a bacterium, and the distinction matters for treatment. Infection causes watery diarrhea, cramping, loss of appetite and fatigue that can drag on for weeks or cycle back without proper medication. Unlike many foodborne illnesses that resolve on their own, cyclosporiasis typically requires a course of the antibiotic trimethoprim-sulfamethoxazole. Anyone who ate the recalled lettuce and developed gastrointestinal symptoms should contact a healthcare provider promptly.
Why the nine-state case count is likely to grow
The FDA’s reported onset window closes on July 20, but Cyclospora cases routinely take three to four weeks to confirm through lab testing and state-level interviews. That lag between when someone falls ill and when their case appears in federal tallies means the current count of 1,947 almost certainly understates the outbreak’s full reach. Additional cases from late June and early July exposures are still working through the reporting pipeline as of late July 2026.
How the outbreak spread from five Taco Bell states to nine
Federal investigators initially traced the contamination to shredded iceberg lettuce served at Taco Bell locations in Indiana, Kentucky, Michigan, Ohio and West Virginia. A July 17 recall followed that early finding. Within days, cases surfaced in Illinois, Kansas, Oklahoma and Pennsylvania, signaling a supply chain problem that reached well beyond a single restaurant chain.
The supplier, Taylor Farms de Mexico, voluntarily recalled all iceberg lettuce sourced from central Mexico. The FDA recall notice covers product distributed between June 29 and July 16, 2026, shipped to multiple states. That broad distribution footprint is how contaminated lettuce ended up in both restaurant kitchens and retail grocery cases, including Walmart’s Marketside line.
Where the investigation stands now
Mexican health authorities have visited the growing region in central Mexico and collected environmental and product samples as part of the joint investigation, according to the Associated Press. Results from that sampling have not yet been made public. On the U.S. side, the FDA says its traceback work is ongoing and that it will update its investigation page as new information becomes available.
For now, the agency’s guidance is simple: do not eat any recalled iceberg lettuce products. Shoppers who still have Marketside salads from the affected distribution window should throw them away or return them to Walmart for a refund. And anyone already experiencing symptoms, particularly prolonged diarrhea or unexplained fatigue, should see a doctor and mention the outbreak.
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