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Table 8 Effect of FO and GL supplementation in calf milk replacer on haematology variables

From: Effect of supplementation with n-3 polyunsaturated fatty acids and/or β-glucans on performance, feeding behaviour and immune status of Holstein Friesian bull calves during the pre- and post-weaning periods

  Fish Oil (FO) β-Glucans (GL) Period (P) relative to weaning P-valuee
+ SED + SED Pre Peri Post SED FO GL P
Haptoglobin, mg/mL 0.28 0.26 0.024 0.25 0.30 0.024 0.34 0.26 0.22 0.022 0.057 0.034 <.0001
WBCa, × 103 cells/μL 11.2 9.4 1.28 10.6 10.0 0.54 9.8A 10.5B 10.6B 0.28 0.185 0.272 0.004
RBCb, ×  106 cells/μL 23.2 23.0 1.14 23.1 23.1 0.44 23.5A 22.6B 23.2A 0.17 0.940 0.927 <.0001
Neutrophils, % 29.1 29.0 1.81 27.5 30.6 1.81 27.7A 28.4A 31.1B 1.31 0.913 0.149 0.009
Lymphocytes, % 56.5 57.5 1.92 59.2 54.8 1.92 58.2 56.6 56.3 1.11 0.568 0.027 0.114
Monocytes, % 10.4 9.9 0.58 9.9 10.4 0.58 10.3A 10.7A 9.5B 0.33 0.444 0.345 0.001
Leukocyte, % 0.70 0.86 0.138 0.74 0.83 0.050 0.79A 0.84AB 0.72AB 0.044 0.379 0.427 0.001
Osmolality 6.09 6.12 0.086 6.00 6.20 0.086 5.77A 6.30B 6.23B 0.065 0.716 0.021 <.0001
IFN- γ PHAc 0.61 0.49 0.074 0.64 0.47 0.074 0.71A 0.54B 0.41C 0.055 0.162 0.019 <.0001
IFN- γ Con Ad 1.11 1.02 0.072 1.16 0.97 0.072 1.17A 1.04B 0.99AB 0.047 0.234 0.012 0.009
  1. aWhite blood cells
  2. bRed blood cells
  3. cIFN- γ PHA = Lymphocyte interferon gamma production in response to phytohaemagglutinin A expressed as absorbance at 450 nm
  4. dIFN- γ Con A = Lymphocyte interferon gamma production in response to concanavalin A expressed as absorbance at 450 nm
  5. eThere were no interactions between the main effects detected for haematology variables with the exception of a FO × P interaction for haptoglobin where during the peri-weaning period there was a strong tendency (P = 0.053) for FO supplemented calves to have lower haptoglobin concentrations compared with un-supplemented calves (Peri-weaning: 0.22 vs 0.30 mg/mL; SED = 0.035) for FO+ vs FO–), however no differences were detected in either the pre- or post-weaning periods
  6. A-CMeans within a row with different superscripts differ significantly (P < 0.05)