Objective:

To report on the surge of cyclospora infections in the U.S. and the investigation into potential sources, particularly lettuce.

Approach:

• Data Collection: Health officials conducted over 1,000 interviews with patients to identify common sources of infection.
• Public Health Advisory: Michigan officials advised consumers to buy whole heads of lettuce and avoid bagged lettuce and pre-mixed salad kits.
• Federal Investigation: The FDA is conducting a traceback investigation on multiple produce items linked to reported cases.

Key Findings:

• More than 30 states reported cyclospora infections in 2026, surpassing the previous record of about 4,700 cases in 2019.
• Michigan reported over 3,300 cases, with lettuce identified as a potential common source.
• Cyclospora causes watery diarrhea and is spread through feces, often linked to contaminated produce.

Interpretation:

Limitations:

• The true number of cases is likely underreported due to mild cases not seeking care.
• Not all infections may be linked to a common source, as some cases involve international travel.

Conclusion:

The investigation into the cyclospora outbreak is ongoing.

Sources:

• Associated Press