One would think that product produced in a controlled setting would be free from pathogens. However, there were many opportunities for contamination and a lack of control. And an indoor greenhouse is not much different than a processing facility where controls are needed. While a definitive source was not found, here is a brief summary of some of the issues"
- The operation stored its nutrient-rich growth media used in an outdoor location that was not adequately protected from potential sources of contamination such as animal intrusion, bird droppings, or water runoff.
- The use of production pond water, while not intended to be an issue with leafy greens final product, but control of the water was questioned and there were inadequate controls for the water itself, with FDA isolating a different strain of Salmonella (not the one involved in the outbreak.
- Harvesting equipment lacked adequate control, and condensate with the facility.
- Inadequate validation support for cooling greens after packaging.
- Issues with storm water retention pond in close proximity to the facility (25ft). This pond did test positive for the outbreak strain.
- The firm did not adequately document that cleaning and sanitizing of equipment, tools, and buildings used in growing operations is routinely conducted in accordance with the firm’s procedures
FDA highlighted the recommendations that focused on the need to better understand the microbial risks and put in place better controls.
The full report can be found here - https://www.fda.gov/media/155402/download
The full report can be found here - https://www.fda.gov/media/155402/download
Investigation Report: Factors Potentially Contributing to the Contamination of Packaged Leafy
Greens Implicated in the Outbreak of Salmonella Typhimurium During the Summer of 2021
https://www.fda.gov/media/155402/download