Table 2.
Caecal colonisation of layer hens 21 days following challenge with Salmonella serovar Typhimurium
| Vaccination protocol | No. of birds positive in caeca post‐challenge at ages (no. challenged) | |||||
|---|---|---|---|---|---|---|
| 4 weeks (n = 8) | 10 weeks (n = 8) | 17 weeks (n = 8) | 25 weeks (n = 10) | 34 weeks (n = 10) | 56 weeks (n = 12) | |
| C | 1 | 2 | 5A | 8 | 6A | 4 |
| V0‐V3 | 1 | 0 | 2AB | 4 | 9A | NT |
| V0‐V3‐N12 | NT | 0 | 2AB | 7 | 9A | NT |
| V0‐V3‐V6 | NT | 2 | 6A | 3 | 5AB | NT |
| V0‐V3‐V6‐N12 | NT | 1 | 2AB | 4 | 6A | 4 |
| N6‐N12 | NT | 2 | 0B | 5 | 6A | 5 |
| V0‐V3‐N6‐N12 | NT | 1 | 2AB | 7 | 5AB | 1 |
| VS4‐VS8 | NT | 2 | 0B | 3 | 1B | 7 |
| V0‐V4‐V14 | 2 | 3 | 1AB | 6 | 6A | NT |
| Statistical difference from control | P > 0.05 | P > 0.05 | P < 0.05* | P = 0.07 | P < 0.05* | P > 0.05 |
*
Significantly different to the control group.
A,BMeans in the same column without common superscripts differ from the control group (P < 0.05).
NT, not tested.