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Please use this identifier to cite or link to this item: http://hdl.handle.net/11019/460

Title: Effect of suckler cow genotype on cow serum immunoglobulin (Ig) levels, colostrum yield, composition and Ig concentration and subsequent immune status of their progeny
Authors: McGee, Mark
Drennan, Michael J
Caffrey, Patrick J.
Keywords: Colostrum
Genotype
Immunoglobulins
Suckler Cows
Issue Date: 2005
Publisher: Teagasc (Agriculture and Food Development Authority), Ireland
Citation: M. McGee, M.J. Drennan, P.J. Caffrey. (2005) Effect of suckler cow genotype on cow serum immunoglobulin (Ig) levels, colostrum yield, composition and Ig concentration and subsequent immune status of their progeny. Irish Journal of Agricultural and Food Research 44: 173–183
Series/Report no.: Irish Journal of Agricultural and Food Research;vol 44
Abstract: Survival of the neonatal calf is largely dependent on humoral immunity. The objective of three experiments reported here was to compare cow serum immunoglobulin (Ig) concentration, colostrum yield, composition and Ig concentration and calf serum Ig concentrations at ~8- and 48-h post partum of spring-calving Charolais (C) and Beef × Holstein-Friesian (BF) cows and their progeny. Cows were individually offered a restricted allowance of grass silage pre partum in Experiments 1 and 2 and silage ad libitum in Experiment 3. In Experiment 1 calves were assisted to suckle after parturition. In Experiments 2 and 3, colostrum yield and Ig concentration were measured following administration of oxytocin and hand milking of half or the complete udder, respectively. It was intended to feed each calf 50 ml (Experiment 2) or 40 ml (Experiment 3) of colostrum per 1 kg birth weight via stomach tube. Following an 8-h period, during which suckling was prevented, a further colostrum sample was obtained. The decrease in cow serum IgG1 concentration pre partum was greater (P < 0.05) in BF cows than C cows. In comparison to BF cows, C cows had a lower colostrum yield (P < 0.001) and the colostrum had lower concentrations of dry matter (P < 0.01), crude protein (P < 0.05), fat (P < 0.05), IgG1 (P = 0.06), IgG2 (P < 0.01), IgM (P < 0.01) and Ig total (P < 0.05). The mass of IgG1, IgG2, IgM, IgA and Ig total in the colostrum produced was significantly lower for C cows than BF cows. Calves from C cows had significantly lower serum Ig subclass concentration at 48-h post partum than calves from BF cows. In conclusion, due to a lower Ig mass produced by their dams, calves from C cows had a lower humoral immune status than those from BF cows
Description: peer-reviewed
URI: http://hdl.handle.net/11019/460
http://www.teagasc.ie/research/journalarchives/vol44no2/2202.pdf
ISSN: 0791-6833
Appears in Collections:Livestock Systems
IJAFR, volume 44, 2005

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