Influence of environmental temperature during late gestation and soon after birth on IgG absorption by newborn piglets
Bate, Lius A.Hacker, R. R.
Canadian Journal of Animal Science
Journal Article
1985
65
1
87
93
Biomedical Sciences
15 sows were maintained either at 18 degrees C, 37% RH (control) or 5 degrees C, 63% RH (cold stressed) from day 104 after mating until 6 h post partum, when cold-treated sows were moved to the 18 degrees C farrowing room. Piglets were taken from sows at birth and kept at 14 degrees C (cold) or 35 degrees C (thermoneutral) until 6 h of age, when they were returned to their dams. Piglets were force-fed bovine colostrum at 25 ml/kg at 0.5, 2, 4 and 6 h of age. Serum cortisol concn. of sows at 5 Show more15 sows were maintained either at 18 degrees C, 37% RH (control) or 5 degrees C, 63% RH (cold stressed) from day 104 after mating until 6 h post partum, when cold-treated sows were moved to the 18 degrees C farrowing room. Piglets were taken from sows at birth and kept at 14 degrees C (cold) or 35 degrees C (thermoneutral) until 6 h of age, when they were returned to their dams. Piglets were force-fed bovine colostrum at 25 ml/kg at 0.5, 2, 4 and 6 h of age. Serum cortisol concn. of sows at 5 degrees C was significantly higher than that of controls, with concn. in both groups increasing at 36 h pre-partum and returning to basal levels within 12 h after farrowing. Piglets born to cold-stressed dams absorbed more bovine and porcine IgG, and synthesized more of their own IgG later, than did piglets born to controls. Piglets cold-stressed after birth absorbed significantly less bovine IgG within the 1st 6 h than piglets maintained at thermoneutrality during the separation period. Piglets born to cold-stressed dams but maintained at thermoneutrality after birth absorbed significantly more bovine IgG than piglets born to controls but cold-stressed after birth. Piglet IgG concn. was not correlated with dam's serum cortisol concn.. Show less
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