US health officials linked iceberg lettuce served at Taco Bell to an outbreak of the parasite cyclospora, which causes “explosive” diarrhea. Health officials warn that the contamination may go beyond the fast-food chain.

Michigan, which is where much of the outbreak is centered, has reported over 4,300 cases of cyclosporiasis, which can cause diarrhea and a low grade fever.

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…

Nearly 7,000 cases of cyclosporiasis have been reported across the country