Produce supplier Taylor Farms is recalling iceberg lettuce shipped to 27 US states because of potential contamination with cyclospora, the parasite causing thousands of cases of diarrhea across the country.

Nearly 7,000 cases nationwide are confirmed or under investigation, according to the CDC. Michigan has accounted for the bulk of cases so far.

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…