Table 3.
The number of infected samples, serotype, and pulsotype of Salmonella in spent hen slaughterhouses.
| Slaughterhouse |
D |
E |
||||||
|---|---|---|---|---|---|---|---|---|
| Samplesa | 1st sampling day |
2nd sampling day |
1st sampling day |
2nd sampling day |
||||
| N | Serotype—pulsotype | N | Serotype—pulsotype | N | Serotype—pulsotype | N | Serotype—pulsotype | |
| Before slaughter | ||||||||
| Scalding tank | ||||||||
| Two wheels and 25 cm transport rail | 1/3 | Enteritidis—K′1 | ||||||
| Plucking machine | ||||||||
| Plucking fingers—1 element (including behind the disc) | 2/3 | Tennessee— J | 1/3 | Livingstone—O | ||||
| Plastic bands between fingers (400 cm2) | 1/3 | Mbandaka— A | ||||||
| Construction (400 cm2) | 1/3 | Livingstone— O | ||||||
| Cooling line | ||||||||
| Two wheels and 25 cm transport rail | 1/3 | Livingstone - O | ||||||
| Samples during slaughter of the first flock | ||||||||
| 24 transport containers after use (4 × 400 cm2) | 2/6 | Enteritidis—M | ||||||
| Swabs of feathers before scalding | 1/3 | Enteritidis—M | ||||||
| Feathers from the plucking machine (25g) | 1/3 | Tennessee—J | 2/3 | Enteritidis—M | ||||
| Neck skins after plucking (25g) | 4/30 | Enteritidis—M | 4/30 | Livingstone—O | ||||
| Neck skins after evisceration (25g) | 1/30 | Enteritidis— K | 9/30 | Enteritidis—M | 4/30 | Livingstone—O | ||
| Pooled sample of 10 ceca | 2/6 | Enteritidis—M | ||||||
| 25 mL of chilling water | 4/6 | Enteritidis—M | ||||||
| Neck skins after chilling (25g) | 29/30 | Enteritidis—M | ||||||
| Thighs (25 g skin) | NA | NA | ||||||
a: An overview of all samples collected can be seen in Table 1. Only samples that were Salmonella positive on one of the sampling occasions are shown here.
1
The symbol ’ after the letter means that up to 2 bands were different between 2 isolates when digested with XbaI; NA: thigh samples were not available.