United States — Food and Drug Administration & Donald Prater

United States — Food and Drug Administration: The FDA led the investigation, linking the outbreak to Taylor Farms lettuce. It faced criticism for a false-positive test result and for potential influence by the United States — White House, but it continues to work on the investigation.

Donald Prater: Donald Prater, FDA's acting deputy commissioner for food, led the traceback investigation and provided updates on the outbreak.

United States — Food and Drug Administration: The FDA is assisting in the outbreak investigation, focusing on food safety and potential contamination sources.

Donald Prater: FDA acting deputy commissioner involved in traceback investigation.