TABLE 4.
Incidence of L. monocytogenes RAPD types from samples obtained at different production stages for 15 fish monitored during production from plant II in October 1998
| Sampling site | Sample source | Total no. of samples | No. of positive samples | No. of isolates with the following RAPD types:
|
|
|---|---|---|---|---|---|
| RAPD type 2 | RAPD type x | ||||
| Raw fish area | Raw fish | 15 | 1 | 1 | |
| Contact surfacesa | 18 | 3 | 3 | ||
| Production environmentb | 114 | 18 | 17 | 1 | |
| Smoking area | Fish after drying | 6 | 3 | 3 | |
| Fish after smoking | 11 | 1 | 1 | ||
| Slicing area | Production environmentb | 68 | 1 | 1 | |
| Contact surfacesa | 11 | 3 | 3 | ||
| Final product | 45 | 8 | 8 | ||
a
Surfaces which were in contact with the unfinished product (equipment surfaces, conveyor belts, gloves of employees, etc.).
b
Production environment (walls, tables, machines, trucks, drains, etc.).