HealthThe U.S. Food and Drug Administration and the Centers for Disease Control and Prevention are widening their investigation into a cyclosporiasis outbreak linked to shredded iceberg lettuce from central Mexico after identifying cases in four additional states.At least 98 people hospitalized so far, CDC data showsThomson Reuters · Posted: Jul 24, 2026 2:20 PM EDT | Last Updated: 1 hour agoListen to this articleEstimated 3 minutesThe audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results.This undated photo taken through a microscope provided by the CDC shows Cyclospora cayetanensis oocysts found in a fresh stool sample which had been prepared with a formalin solution and stained with safranin. (CDC/The Associated Press)The U.S. Food and Drug Administration and the Centers for Disease Control and Prevention are widening their investigation into a cyclosporiasis outbreak linked to shredded iceberg lettuce from central Mexico after identifying cases in four additional states.This outbreak now includes cases from nine states: Illinois, Indiana, Kansas, Kentucky, Michigan, Ohio, Oklahoma, Pennsylvania and West Virginia, the FDA said on Friday.A total of 1,947 people infected with the Cyclospora parasite, with exposure to Taco Bell, have been reported by the nine states, the FDA said, citing epidemiological data collected by CDC. There have been at least 98 hospitalizations and no reported deaths from the infection, the regulator said.Oklahoma's health department said it is working with the FDA to determine whether additional cases are tied to the outbreak.Cases of cyclosporiasis have been reported in at least 41 states this year, though investigators are still working to determine how many cases are linked to the outbreak tied to shredded iceberg lettuce supplied by Taylor Farms and served at Taco Bell restaurants.WATCH | U.S. recalls lettuce linked to outbreak:U.S. recalls lettuce linked to diarrhea-causing outbreakJuly 19|Duration 4:08Update (July 20, 2026): The U.S. Food and Drug Administration (FDA) is now saying the result of an investigation into shredded iceberg lettuce supplied by Taylor Farms should be considered a false positive. The company said the agency apologized, and that no single positive product test result has been identified.