Case Study Exercise- Scenario 1: Packing Blueberries
Environmental Pathogens Intervention & Control Workshop
Case Study Exercise
Using your current knowledge and any resources available (FDA draft guidance, United Fresh guidance, your existing EMP, etc.), what would you do?
Scenario 1: Packing Blueberries
You take 10 swabs per week, mostly in Zones 2 and 3. Every month you take five Zone 1 swabs. You had your second operative (e.g., during production) Listeria spp. positive on a conveyor belt (Zone 1; FCS). The other positive you had there was a month ago. At that time you did a deep clean and vector swabbing; all results were negative. Over the past three months, you’ve had a two other Listeria spp. positives as part of the overall environmental monitoring program. Both were in the drain closest to the conveyor.
- Do you consider this a routine positive, or a follow-up positive? How do you support your decision?
- Does the food support growth of Lm (i.e., 1-log increase before the end of shelf life at 45°F)?
- What are your immediate next steps based on these test results?
- Should you do more testing?
- Should you speciate to determine if it is monocytogenes?
- Should you stop this line?
- Is a recall warranted?
- Should you notify FDA?
- What else would you do?
- Share your answers with a facilitator and they will provide you with some new information. What info did you learn from the facilitator in Phase 2 of this exercise, and how would you respond?
Does this change any of your answers from question 3?