Cyclospora cases have been reported in at least 47 states total this year, and investigators have continued to probe how many could be linked to a common contaminated source.

The outbreak of the intestinal illness has been linked to iceberg lettuce from some operations in central Mexico, but authorities are still seeking other potential sources.

US cyclosporiasis cases have reached record levels this year, with the current epidemic among the largest foodborne illness outbreaks in recent US history.