According to the CDC, the evidence indicates that packaged salads produced at the Dole processing facility in Springfield, Ohio are the likely source. From the CDC report:
- Five (100%) of the five ill people who were asked about packaged salad reported eating packaged salad in the month before becoming ill. Two (100%) of two ill people who specified a brand of packaged salad reported eating various varieties of Dole brand packaged salads.
- The Ohio Department of Agriculture collected a Dole brand Field Greens packaged salad from a retail location and isolated Listeria. Laboratory tests showed that the Listeria isolate from the packaged salad was highly related genetically to isolates from ill people. This packaged salad was produced at the Springfield, Ohio Dole processing facility.
CDC began investigating this in September of 2015, but as can be seen, there has been only a few cases coming in at a time, making the investigation process more difficult with providing a specific source.
At this point, it is difficult to comment too much without knowing more information. Did the plant have an active Listeria control program? Was it comprehensive in terms of evaluating washing systems and food contact surfaces including buildup/biofilms in those washing systems. In many facilities, there is a focus on noncontact surfaces (zones 2 and 3) and conducting of preoperational samples rather than operational, but if there was indeed an issue in the process, would it have been identified if the facility was not looking deeper? Did they know that they had an issue?
At this point, it is difficult to comment too much without knowing more information. Did the plant have an active Listeria control program? Was it comprehensive in terms of evaluating washing systems and food contact surfaces including buildup/biofilms in those washing systems. In many facilities, there is a focus on noncontact surfaces (zones 2 and 3) and conducting of preoperational samples rather than operational, but if there was indeed an issue in the process, would it have been identified if the facility was not looking deeper? Did they know that they had an issue?
CDC Outbreak Notice
Multistate Outbreak of Listeriosis Linked to Packaged Salads Produced at Springfield, Ohio Dole Processing Facility
Posted January 25, 2016 4:15 PM ET
At a Glance:
Highlights
