Recent cases of the intestinal illness cyclosporiasis have been linked to shredded iceberg lettuce served at some Taco Bell locations across Indiana, Kentucky, Michigan, Ohio, and West Virginia. This identification stems from an ongoing investigation by the Food and Drug Administration (FDA), according to a source familiar with the inquiry.

The FDA's traceback investigation has pointed to a single supplier of iceberg lettuce originating from Mexico, which served the specific Taco Bell restaurants where patrons reported falling ill. The identity of this supplier has not yet been publicly disclosed.

Prior to this development, Michigan health officials had indicated that lettuce or salad greens were suspected as potential sources for the outbreak. However, they had not pinpointed a specific ingredient, grower, supplier, or retailer.

This finding emerges as health authorities continue to investigate a widespread outbreak of cyclosporiasis that has affected an estimated nearly 7,000 individuals across 34 states. Michigan has reported the highest number of cases, with 4,312 illnesses and 102 hospitalizations. Ohio has also seen a significant increase, reporting 1,244 cases.

Cyclosporiasis is an intestinal infection caused by the parasite Cyclospora cayetanensis. Symptoms typically include diarrhea, loss of appetite, weight loss, cramping, bloating, gas, nausea, and fatigue. The illness can be treated with antibiotics.

In response to the ongoing situation, Taco Bell stated that the health and safety of its guests are its top priority. The company indicated it is closely monitoring the situation and adhering to guidance from public health authorities. Earlier in the week, Taco Bell had announced the voluntary and temporary removal of certain ingredients from select restaurants as a precautionary measure.

The multistate outbreak underscores the potential for foodborne illnesses to spread rapidly through shared supply chains. Health officials are continuing to work to identify the full scope of the contamination and prevent further cases.

Further details regarding the specific supplier and the extent of the contamination are expected as the FDA and state health departments continue their investigations.