A concern for FSIS is that because this is a frozen product, people may have put into freezers and not check to see if this is the recalled lot. Another concern may be that if this one lot is positive for Listeria, what about other other production lots.
While it is not indicated how the company determined the product had a Listeria contamination issue, it is important to note that the product was produced over a month prior to issuing the recall. So either internal testing was delayed or a customer company did the testing. If the former, then one would expect a test-and-hold procedure for the frozen product.
The risk - although this product will likely be heated before being served, as a fully cooked product, the heating instructions will be for heat and serve rather than fully cooking the product. The heat-and-serve heating conditions may not be sufficient to eliminate the organisms present.
https://www.fsis.usda.gov/wps/portal/fsis/topics/recalls-and-public-health-alerts/recall-case-archive/archive/2018/recall-006-2018-release
Rich Products Corporation Recalls Beef Products due to Possible Listeria Contamination
Class I Recall
https://www.fsis.usda.gov/wps/portal/fsis/topics/recalls-and-public-health-alerts/recall-case-archive/archive/2018/recall-006-2018-release
Rich Products Corporation Recalls Beef Products due to Possible Listeria Contamination
Class I Recall
006-2018
Health Risk: High
Health Risk: High
Jan 24, 2018