Effect of Temperature on Colostrometer Readings for Estimation of Immunoglobulin Concentration in Bovine Colostrum

Effect of temperature on colostrometer readings for estimation of immunoglobulin concentration in bovine colostrum was investigated. Twenty-five colostrum samples were collected within 24h postpartum from Holstein cows. Immunoglobulin concentration of colostrum was measured using a colostrometer thr...

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Bibliographic Details
Published in:Journal of dairy science 1991-11, Vol.74 (11), p.3940-3943
Main Authors: Mechor, G.D., Gröhn, Y.T., van Saun, R.J.
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
CALOSTRO
Cattle - immunology
colostral immunoglobulin
colostrometer
COLOSTRUM
Colostrum - immunology
DENSIDAD
DENSITE
EQUIPO
Fundamental and applied biological sciences. Psychology
General aspects
IMMUNOGLOBULINE
Immunoglobulins - analysis
INMUNOGLOBULINA
MATERIEL
MEDICION
MESURE
Regression Analysis
TEMPERATURA
TEMPERATURE
VACA
VACHE
Vertebrates: anatomy and physiology, studies on body, several organs or systems
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Summary:Effect of temperature on colostrometer readings for estimation of immunoglobulin concentration in bovine colostrum was investigated. Twenty-five colostrum samples were collected within 24h postpartum from Holstein cows. Immunoglobulin concentration of colostrum was measured using a colostrometer through 5°C increments from 0 to 40°C. Two technicians measured independently a total of 225 samples. The agreement between technicians’ readings was high (r = .98); thus, readings were averaged and used in regression analysis. A final regression model explained 92.5% of the total variation: corrected reading at 20°C = uncorrected reading − 13.2 + .8×temperature (°C). The regression equation was used to develop a conversion chart for practical field use.
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(91)78587-1