Table 3 Number of positive birds and mean cecal C. jejuni counts of colonized broilers receiving standard feed supplemented with 5% (wt/wt) egg yolk from either bacterin-immunized, subunit vaccine-immunized or sham-immunized (control) layers, from day 1 until day 16 (the day of euthanasia).
Number of positive birds | Mean C. jejuni counts of positive birds | |||||
|---|---|---|---|---|---|---|
Bacterin | Subunit | Control | (log10(cfu/g cecal content)) (Standard deviation) | |||
Bacterin | Subunit | Control | ||||
All birds | ||||||
Group 1 | 2/9 | 4/9 | 5/9 | 4.48 (0.25) | 3.64 (2.18) | 3.81 (1.53) |
Group 2 | 2/9 | 4/9 | 8/9 | 3.50 (0.71) | 5.71 (1.83) | 4.31 (1.74) |
Group 3 | 0/9 | 4/9 | 8/9 | - (−) | 5.08 (1.88) | 4.59 (1.80) |
Treatment | 4/27 a | 12/27 a | 21/27 b | 3.99a (0.71) | 4.81a (2.00) | 4.30a (1.66) |
Seeders | ||||||
Group 1 | 0/3 | 3/3 | 3/3 | - (−) | 3.85 (2.62) | 4.39 (1.60) |
Group 2 | 1/3 | 2/3 | 3/3 | 4.00 (−) | 6.01 (2.39) | 5.76 (2.09) |
Group 3 | 0/3 | 1/3 | 3/3 | - (−) | 5.04 (−) | 4.81 (2.31) |
Treatment | 1/9 a | 6/9 ab | 9/9 b | 4.00a (−) | 4.77a (2.24) | 4.99a (1.85) |
Sentinels | ||||||
Group 1 | 2/6 | 1/6 | 2/6 | 4.48 (0.25) | 3.00 (−) | 2.94 (1.33) |
Group 2 | 1/6 | 2/6 | 5/6 | 3.00 (−) | 5.41 (2,00) | 3.45 (0.81) |
Group 3 | 0/6 | 3/6 | 5/6 | - (−) | 5.10 (2.30) | 4.46 (1.72) |
Treatment | 3/18 a | 6/18 a | 12/18 b | 3.98a (0.87) | 4.85a (1.94) | 3.79a (1.38) |
