Taco Bell under investigation as health officials probe cyclosporiasis outbreak

Federal and state health officials are investigating a potential link between Taco Bell locations and a widespread outbreak of cyclosporiasis, a gastrointestinal illness caused by the microscopic parasite Cyclospora cayetanensis. The investigation remains active as authorities track a surge of cases across 34 states. According to the Centers for Disease Control and Prevention (CDC), there are 1,645 confirmed domestic cases, with the agency monitoring more than 5,100 additional reports that require further analysis to confirm if they were domestically acquired.

Public focus on the restaurant chain intensified after customers in the Detroit area reported seeing signs at various locations stating they were "currently unable to sell Lettuce, Cilantro, Onion, Pico de Gallo, and Guacamole due to a nationwide recall." Despite this signage, no federal agency—including the Food and Drug Administration (FDA)—has issued a public recall involving Taco Bell. The chain, a subsidiary of Yum! Brands Inc., later clarified its position in a statement.

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"The health and safety of our guests is our top priority. Public health officials have not confirmed a link to Taco Bell or any specific ingredient, supplier, restaurant or retailer. While authorities continue their broader review, Taco Bell has voluntarily and temporarily removed limited ingredients at select restaurants as a precautionary measure. We will continue to closely monitor the situation and follow the guidance of public health authorities."

Taco Bell Corp., via Newsweek

Michigan has emerged as the epicenter of the outbreak, recording 3,309 cases as of 14 July 2026. This figure marks the largest such outbreak in the state's history. Health officials in Michigan, alongside federal partners, are conducting traceback investigations and thousands of patient interviews to identify a source. Current results from the Michigan Department of Health and Human Services (MDHHS) point toward lettuce or salad greens as a potential vehicle for the parasite, though officials have not identified a specific grower, supplier, or product as the confirmed source. While some patients interviewed reported eating at Taco Bell before falling ill, others did not, which investigators suggest may indicate multiple sources of contamination within the broader food supply chain.

Cyclosporiasis typically presents with symptoms including loss of appetite, vomiting, fever, and severe, watery, and often "explosive" diarrhea. Because the parasite has an incubation period that can last up to two weeks, pinpointing the exact source of exposure is notoriously difficult. The parasite is primarily associated with fresh produce contaminated by fecal matter. Unlike other pathogens like Salmonella or E. Coli, Cyclospora is most commonly linked to human-source contamination.

Health departments are providing specific guidance to consumers to reduce risk while the investigation continues:

• Heat treatment: Cooking produce to at least 158° F (70° C) is considered the most effective method to inactivate the parasite.
• Selective produce purchasing: Officials advise buying whole heads of lettuce or other greens rather than pre-bagged or pre-mixed varieties. Consumers are encouraged to discard the outer layers and wash the remaining leaves thoroughly.
• Peelable items: Fruits and vegetables with smooth skins or protective coverings that are discarded before consumption, such as avocados or bananas, present a lower risk than raw, unpeeled produce.

As of mid-July, there have been zero reported deaths associated with this outbreak, and the infection is typically treated with antibiotics.