title: Effect of temperature on colostrometer readings for estimation of immunoglobulin concentration in bovine colostrum.
abstract: Effect of temperature on colostrometer readings for estimation of immunoglobulin concentration in bovine colostrum was investigated. Twenty-five colostrum samples were collected within 24 h postpartum from Holstein cows. Immunoglobulin concentration of colostrum was measured using a colostrometer through 5 degrees C increments from 0 to 40 degrees 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 degrees C = uncorrected reading - 13.2 + .8 x temperature (degrees C). The regression equation was used to develop a conversion chart for practical field use.
authors.affiliation: Department of Clinical Sciences, New York State College of Veterinary Medicine, Ithaca.
authors.forename: G D
authors.initials: GD
authors.lastname: Mechor
authors.forename: Y T
authors.initials: YT
authors.lastname: Gröhn
authors.forename: R J
authors.initials: RJ
authors.lastname: Van Saun
mesh_terms: D000818:Animals; D002417:Cattle / Q000276:immunology*; D003126:Colostrum / Q000276:immunology*; D007136:Immunoglobulins / Q000032:analysis*; D012044:Regression Analysis; D013696:Temperature
chemical_list: D007136:Immunoglobulins