Table 2

Effect of stress on circulating cortisol and haptoglobin concentrations in control and weaned calves
Days post weaning P-values
Variable 0 1 2 3 7 T S T × S
Cortisol C 6.1 ± 1.17 4.3x ± 1.36 8.5 ± 1.81 5.7 ± 1.31 9.7 ± 2.29 NS * *
(ng/mL) W 6.3 ± 1.09 8.4y ± 1.27 8.4 ± 1.68 8.4 ± 1.23 6.5 ± 2.14
Haptoglobin C 1.04 ± 0.052 1.07 ± 0.068 0.52b ± 0.184 0.30c ± 0.122 0.29c ± 0.076 NS *** NS
(mg/mL) W 1.02 ± 0.049 1.14 ± 0.063 1.03 ± 0.173 0.49b ± 0.114 0.39c ± 0.071

The values are expressed as least squares means (Lsmeans) ± s.e.

C = Control, W = Weaned, T = treatment, S = sampling time, T × S = treatment × sampling time interaction, NS = not significant (P > 0.05).

* = P < 0.05, ** = P < 0.01, *** = P < 0.001.

a,b,cWithin rows, Lsmeans differ from pre-weaning baseline by P < 0.05, P < 0.01 and P < 0.001, respectively.

O’Loughlin et al.

O’Loughlin et al. BMC Genomics 2012 13:250   doi:10.1186/1471-2164-13-250

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