Which action is appropriate if STEC is detected and the lot is to be preserved for investigation?

Which action is appropriate if STEC is detected and the lot is to be preserved for investigation?

• A. Issue NR
• B. Instruct the establishment to divert the affected lot
• C. Retain the product with U.S. Retained tag
• D. Collect directed follow up samples

Answer: (C)

When STEC is detected and the lot is to be preserved for investigation, the product should be retained with a U.S. Retained tag. This action clearly communicates that the lot is held and not to be released or diverted, ensuring it remains in its current state for investigators to review. The tag provides a visible, documented indication of retention, helps maintain the chain of custody, and protects evidence for any follow-up testing or traceback. This approach prevents the product from entering the market or being moved for other processing, which is essential for an accurate investigation. While follow-up sampling and other steps may occur as part of the investigation, the critical immediate action is to keep the lot secured and clearly marked as retained.

When STEC is detected and the lot is to be preserved for investigation, the product should be retained with a U.S. Retained tag. This action clearly communicates that the lot is held and not to be released or diverted, ensuring it remains in its current state for investigators to review. The tag provides a visible, documented indication of retention, helps maintain the chain of custody, and protects evidence for any follow-up testing or traceback.

This approach prevents the product from entering the market or being moved for other processing, which is essential for an accurate investigation. While follow-up sampling and other steps may occur as part of the investigation, the critical immediate action is to keep the lot secured and clearly marked as retained.