Taco Bell has removed lettuce linked to a cyclosporiasis outbreak from restaurants, it said Friday.

Federal health officials have identified lettuce from Mexico served by Taco Bell locations across five U.S. states as a source of the widespread outbreak of diarrhea-causing parasite cyclospora.

An investigation by the Centers for Disease Control and Prevention, the Food and Drug Administration and state health officials has linked shredded iceberg lettuce served at Taco Bell locations in Ind...