A multistate outbreak of cyclosporiasis has been declared over by health authorities. The outbreak was the largest on record and involved contaminated iceberg lettuce. Thousands of people were sickened as a result.

Further investigation is still underway to determine how the parasite entered the food supply. The FDA is leading this probe, although details of its progress are not yet available.

For more information on the outbreak and the ongoing investigation, readers can consult the original report, which provides additional context and background on the incident.