Concentrations of Trypsin Inhibitor and Immunoglobulins in Colostrum of Jersey Cows

Colostrum samples from 49 Jersey cows were analyzed for concentrations of trypsin inhibitor, IgG, IgM, IgA, TS, fat, specific gravity, and N fractions. Colostrum (100ml) was sampled from each cow as soon as possible after parturition. Mean concentrations of IgG, IgM, and IgA were 84.6, 3.4, and 4.5g...

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Bibliographic Details
Published in:Journal of dairy science 1995-07, Vol.78 (7), p.1573-1577
Main Authors: Quigley, J.D., Martin, K.R., Dowlen, H.H.
Format: Article
Language:English
Subjects:
Animals
CALOSTRO
Cattle - immunology
Cattle - metabolism
COLOSTRUM
Colostrum - chemistry
Colostrum - immunology
CONTENIDO DE NITROGENO
DENSIDAD
DENSITE
Female
GRASA DE LA LECHE
immunoglobulin
Immunoglobulin A - analysis
Immunoglobulin G - analysis
Immunoglobulin M - analysis
IMMUNOGLOBULINE
Immunoglobulins - analysis
INHIBIDORES DE ENZIMAS
INHIBITEUR D'ENZYME
INMUNOGLOBULINA
Jersey
Lactation
Lipids - analysis
MATIERE GRASSE DU LAIT
Nitrogen - analysis
RACE (ANIMAL)
RAZAS (ANIMALES)
SOLIDE
SOLIDOS
Specific Gravity
TENEUR EN AZOTE
TRIPSINA
trypsin inhibitor
Trypsin Inhibitors - analysis
TRYPSINE
VACA
VACAS LECHERAS
VACHE
VACHE LAITIERE
VOLUME
VOLUMEN
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Summary:Colostrum samples from 49 Jersey cows were analyzed for concentrations of trypsin inhibitor, IgG, IgM, IgA, TS, fat, specific gravity, and N fractions. Colostrum (100ml) was sampled from each cow as soon as possible after parturition. Mean concentrations of IgG, IgM, and IgA were 84.6, 3.4, and 4.5g/L, respectively. Mean concentration of trypsin inhibitor was 56mg of trypsin inhibited/dl of colostrum. Concentration of trypsin inhibitor was unaffected by lactation number and averaged 60, 53, and 54mg of trypsin inhibited/dl of colostrum for cows in first, second, and third or later lactations, respectively. Colostral trypsin inhibitor and IgG were correlated (.54), although correlations between trypsin inhibitor and IgM and IgA were not significant. Trypsin inhibitor in colostrum was also positively correlated with fat, total N, protein N, noncasein N, and TS in colostrum. Variation in concentration of trypsin inhibitor from first-milking colostrum was closely related to colostral IgG concentration and may serve to protect IgG and other proteins from proteolytic degradation in the intestine of the neonatal calf.
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(95)76780-7