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Shredded iceberg lettuce supplied by Taylor Farms and sold at some Taco Bell restaurants has been linked to a multistate outbreak of cyclosporiasis, a source familiar with the investigation said Thursday.
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Cases of the intestinal illness caused by a microscopic parasite are surging across the US, with nearly 7,000 cases confirmed or under investigation since May 1, according to data published Tuesday by the CDC. Confirmed cases alone are more than six times higher than they were at this time last year, and there have been at least 141 hospitalizations.
The outbreak linked to the lettuce, however, is considered to be a regional one, centered in the Midwest.
The CDC has identified at least 400 cases associated with the outbreak across four states: Michigan, Ohio, West Virginia and Kentucky. These cases are among people who reported symptoms on or after June 22, the agency said in an update Tuesday.
The Michigan state health department has reported more than 4,300 cases of cyclospora during the outbreak investigation. Michigan said it has interviewed more than 1,000 people as part of its investigation and had previously noted that lettuce or salad greens may be a potential source for the outbreak.
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Cyclosporiasis is not usually spread directly from person to person. Instead, people can become infected by consuming contaminated food or water. Previous outbreaks have been linked to fresh produce, the CDC says.
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People with cyclosporiasis may have symptoms that include watery diarrhea, cramping and bloating for weeks.
Federal health officials said there are multiple investigations underway, some tied to the large outbreak in the Midwest, some involving single states and some involving cases not yet tied to any cluster.
Taylor Farms supplies grocery stores and restaurants across the country, although it’s unclear exactly how many of its products and which locations may be affected. The company has not yet responded to CNN’s request for comment Thursday.
Taco Bell said Tuesday that it was removing some ingredients from its menu at some restaurant locations as a precaution.
“While authorities continue their broader review, Taco Bell has voluntarily and temporarily removed limited ingredients at select restaurants as a precautionary measure,” Taco Bell Corp. said in a statement. “We will continue to closely monitor the situation and follow the guidance of public health authorities.”
Taylor Farms produce has also been linked with previous illness outbreaks, including E. coli cases tied to slivered onions in 2024 and cyclospora cases linked with lettuce in 2013.