Shredded iceberg lettuce supplied to Yum Brands' Taco Bell restaurants by California-based supplier Taylor Farms has been identified by investigators as a potential source of contamination in the cyclosporiasis outbreak that has sickened thousands of people in the United States, the Washington Post reported on Thursday, citing two individuals familiar with the investigation.
While the US has experienced outbreaks of the parasitic intestinal infection before, the scale and geographic spread of this year's outbreak are significantly larger, prompting concern among health officials.
