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Effect of age and nutrient restriction pre partum on beef suckler cow serum immunoglobulin concentrations, colostrum yield, composition and immunoglobulin concentration and immune status of their progeny
McGee, Mark Drennan, Michael J Caffrey, Patrick J.
McGee, Mark
Drennan, Michael J
Caffrey, Patrick J.
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2006
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M. McGee, M.J. Drennan and P.J. Caffrey. Effect of age and nutrient restriction pre partum on beef suckler cow serum immunoglobulin concentrations, colostrum yield, composition and immunoglobulin concentration and immune status of their progeny. Irish Journal of Agricultural and Food Research 45: 157–171, 2006
Abstract
The effect of cow age (multiparous (MP) v. primiparous (PP)) and nutritional restriction
pre partum (grass silage ad libitum v. straw only ad libitum for the last 15 (s.d. 3.3)
days of gestation) on cow serum immunoglobulin (Ig) concentration, on colostrum yield, composition and Ig concentration and on calf serum Ig concentrations (at ~8 and 48 h post partum) using spring-calving Limousin Holstein-Friesian cows and their progeny was studied over 3 years. The method of colostrum administration (stomach tube vs. assisted suckling within 1 h post partum) on calf immune status was also investigated. When feeding colostrum the target was to give each calf 50 mL per kg birthweight via stomach tube. Colostrum yield and Ig concentration were measured
following administration of oxytocin and hand-milking of half (Experiments 1 and
2) or the complete udder (Experiment 3). Following an 8-h period after birth during
which suckling was prevented a further colostrum sample was obtained. There was no
significant difference in first milking colostrum Ig subclass concentrations between the
within-quarter fractions or between the front and rear quarters of the udder in either
MP or PP cows. Colostrum Ig subclass concentrations at second milking were 0.46 to
0.65 of that at first milking. Compared to MP cows offered silage, colostrum yield and
the mass of colostrum IgG1, IgG2, IgM, IgA and total Ig produced was lower (P < 0.001)
for PP cows and the mass of IgG1, IgM and total Ig produced was lower (P < 0.05) for MP cows offered straw. Calves from PP cows and MP cows offered straw had significantly
lower serum IgG1 and total Ig concentrations at 48 h post partum than calves
from MP cows offered silage but there was no difference (P > 0.05) between colostrum
feeding methods. In conclusion, calves from PP cows and MP cows offered straw had a
lower humoral immune status than those from MP cows offered grass silage.