Federal health officials on Friday said they have linked cases of a diarrhea-causing parasite tied to shredded lettuce to an additional four states, expanding the scope of the largest U.S. outbreak of cyclospora.
The Centers for Disease Control and Prevention said the outbreak first tied to Taco Bell restaurants now includes Illinois, Kansas, Oklahoma, and Pennsylvania. Previously the agency's investigation included five states: Indiana, Kentucky, Michigan, Ohio and West Virginia.
