The influence of the sow's adrenal activity on ...
|Title||The influence of the sow's adrenal activity on the ability of the piglet to absorb IgG from colostrum|
|Author(s)||Lius A. Bate, R. R. Hacker|
|Journal||Canadian Journal of Animal Science|
|Abstract||From day 104 to 114 after mating, 7 sows received daily intravenous infusions of ACTH at 1 IU/kg while 6 sows received daily infusions of metyrapone at a dose decreasing stepwise from 5 mg/kg on day 104 to 1 mg/kg on day 108, followed by saline until day 114. Saline was infused into 5 control sows. Piglets were separated from dams at birth and force-fed bovine colostrum at 25 ml/kg at 0.5, 2, 4 and 6 h of age. Piglets were returned to the dam and allowed to suckle freely 6 h after birth of their eldest littermate. During infusion, cortisol and corticosterone concn. in serum remained stable and similar in metyrapone-treated and control sows but increased significantly in ACTH-treated sows, whereas 11-deoxycortisol concn. increased in both ACTH and metyrapone-infused groups. Bovine IgG concn. in piglet serum peaked between 6 and 24 h of age and was higher in piglets of ACTH-treated sows than in those of controls, and still higher in piglets pf metyrapone-infused sows. Concn. of porcine IgG followed a similar pattern but with greater variability, making it impossible to differentiate the groups statistically. Birth wt. was highest for piglets of metyrapone-treated sows and lowest for those of controls; mortality rates were highest with the lightest piglets..|
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