Table 5.
Effects of dietary treatments on haematological parameters of laying hens at 36 and 52 weeks of age
| Haematological parameters | Hen age (weeks) | |||||||
|---|---|---|---|---|---|---|---|---|
| 36 weeks of age | 52 weeks of age | |||||||
| Control | PRE | PRO | SYN | Control | PRE | PRO | SYN | |
| Lymphocyte (%) | 33.16 ± 1.55b | 41.22 ± 0.70a | 40.16 ± 1.13a | 41.70 ± 1.25a | 28.87 ± 0.79b | 32.59 ± 2.23a | 31.97 ± 2.45a | 33.96 ± 1.94a |
| Heterophil (%) | 58.18 ± 1.94a | 49.75 ± 1.52b | 49.91 ± 1.17b | 47.34 ± 1.45b | 60.87 ± 1.18a | 56.79 ± 1.81b | 57.74 ± 1.06b | 55.46 ± 1.27b |
| H/L ratio | 1.65 ± 0.17a | 1.17 ± 0.06b | 1.11 ± 0.03b | 1.07 ± 0.15b | 2.11 ± 0.09a | 1.75 ± 0.18b | 1.82 ± 0.17b | 1.64 ± 0.14b |
| RBC (× 1012/L) | 2.34 ± 0.13 | 2.38 ± 0.21 | 2.33 ± 0.15 | 2.49 ± 0.14 | 2.13 ± 0.07 | 2.14 ± 0.10 | 2.21 ± 0.05 | 2.22 ± 0.14 |
| Hb (g/L) | 118.56 ± 5.97 | 126.67 ± 6.66 | 115.50 ± 5.64 | 122.17 ± 2.26 | 112.00 ± 2.46 | 113.13 ± 1.75 | 112.92 ± 2.91 | 115.71 ± 1.70 |
| PCV (L/L) | 0.27 ± 0.01 | 0.27 ± 0.01 | 0.27 ± 0.01 | 0.27 ± 0.01 | 0.25 ± 0.02 | 0.23 ± 0.01 | 0.24 ± 0.01 | 0.26 ± 0.01 |
| MCV (fL) | 120.54 ± 1.78 | 126.50 ± 1.53 | 118.91 ± 2.60 | 120.42 ± 6.55 | 112.55 ± 1.22 | 113.42 ± 1.23 | 112.57 ± 1.65 | 115.73 ± 3.07 |
| MCHC (g/L) | 420.77 ± 18.77 | 444.01 ± 23.12 | 439.77 ± 6.49 | 440.17 ± 5.74 | 456.38 ± 5.32 | 470.98 ± 14.75 | 458.48 ± 6.54 | 460.35 ± 13.39 |
| WBC (× 109/L) | 23.57 ± 2.19 | 23.92 ± 1.02 | 24.76 ± 1.78 | 24.57 ± 1.67 | 23.85 ± 3.87 | 24.88 ± 4.27 | 24.13 ± 4.70 | 25.28 ± 2.20 |
| Thrombocyte (× 109/L) | 24.49 ± 2.50 | 27.58 ± 3.72 | 24.83 ± 1.25 | 28.07 ± 0.78 | 21.60 ± 2.44 | 24.73 ± 4.18 | 25.78 ± 2.49 | 25.32 ± 3.31 |
| Monocyte (%) | 3.50 ± 0.50 | 3.27 ± 0.75 | 3.67 ± 1.26 | 4.67 ± 0.58 | 4.03 ± 0.19 | 3.97 ± 0.62 | 3.81 ± 0.47 | 3.83 ± 0.53 |
| Eosinophil (%) | 2.27 ± 0.93 | 2.67 ± 0.76 | 3.00 ± 0.87 | 3.17 ± 0.76 | 3.20 ± 0.42 | 3.25 ± 0.46 | 3.38 ± 0.92 | 3.57 ± 0.54 |
| Basophil (%) | 2.90 ± 0.66 | 3.10 ± 0.53 | 3.27 ± 0.25 | 3.13 ± 0.65 | 3.04 ± 0.53 | 3.40 ± 0.44 | 3.10 ± 0.78 | 3.19 ± 0.55 |
H/L heterophil/lymphocyte, RBC red blood cell, Hb haemoglobin, PCV packed cell volume, MCV mean corpuscular volume, MCHC mean corpuscular haemoglobin concentration, WBC white blood cell
Data represent mean ± SD of four replicates of three hens each
a,bMeans within a row at a particular age with different superscripts differ significantly (P < 0.05)
Control, basal diet; PRE, basal diet +1% IMO; PRO, basal diet +0.1% PrimaLac®; SYN, basal diet +1% IMO + 0.1% PrimaLac®