Technical reference
Three features make different: it grows at refrigeration temperatures, it persists in the environment, and its severity is greatest for vulnerable consumers. So controls focus on post-process contamination and on shelf life.
Parameters
| Growth limits | −0.4 to 45 °C; 0.92; 4.4 to 9.4 |
|---|---|
| Schedule 27, growth can occur | n=5, c=0, in 25 g |
| Schedule 27, no growth | n=5, c=0, m=10² |
| Listericidal process | Reduces to a safe level |
| Thermal example | reduction: 2 min at 70 °C (FDA) |
Records that prove it
- Growth assessment and evidence
- Shelf-life validation
- Environmental monitoring results
- Product results
- Investigation and corrective action
Where Listeria can grow
Extreme reported in the literature, with other conditions favourable. They may not apply to your food or process. Source: , Table A-1.
CCP or prerequisite?
That depends on the for your process. The number, if it has one, belongs to your plan.