The FDA said two samples tested positive for the parasite.
About 6,700 of those cases have been laboratory-confirmed, the CDC says.
Health officials are continuing to investigate as cases of cyclosporiasis spread across the U.S. But what exactly goes into investigating a foodborne outbreak?
The CDC expanded the outbreak of cyclosporiasis linked to shredded iceberg lettuce to an additional four states, a CDC official told ABC News on Friday.
"Country of Origin Labeling" -- or COOL -- is a federal requirement for many fresh fruits and vegetables, some meats, seafood, and certain nuts.