U.S. health officials have identified shredded iceberg lettuce served at Taco Bell as one source of contamination behind an outbreak of parasitic infections affecting over 1,000 people.
The outbreak has been caused by the protozoan parasite Cyclospora cayetanensis, which can enter the body when someone consumes food or water contaminated with the parasite. Since May 1, there have been 1,644 confirmed cases across Indiana, Kentucky, Ohio, West Virginia and Michigan, which is currently the hardest-hit state.
