Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/52855
Title: Use of clinic refractometer at farm as a tool to estimate the IgG content in goat colostrum
Authors: Castro Navarro, Noemí 
Andrea Gomez-Gonzalez, Lenny
Earley, Bernadette
Argüello Henríquez, Anastasio 
UNESCO Clasification: 3104 Producción Animal
Keywords: Immunoglobulin-G Concentration
Bovine Colostrum
Short Communication
Quality
Serum, et al
Issue Date: 2018
Journal: Journal of Applied Animal Research 
Abstract: Refractometry has been proposed as a farm technique to estimate the IgG concentration in colostrum. In order to validate the method in goat colostrum using a clinical refractometer, 216 colostrum and milk samples were obtained from 54 dairy goats. Samples were evaluated for protein concentration using a clinical refractometer and IgG concentration was measured using a commercial ELISA. The r(2) for the linear regression between refractometry value and IgG concentration measured by ELISA was 0.79, and the area under the receiver operating characteristics curve was 0.99. The proposed cut-off value using the clinical refractometer was 10mg/mL. At this point, the sensitivity, specificity, negative predictive value, positive predictive value, Youden's index and accuracy were 100%, 95.19%, 100%, 76.32%, 0.95% and 95.83%, respectively.
URI: http://hdl.handle.net/10553/52855
ISSN: 0971-2119
DOI: 10.1080/09712119.2018.1546585
Source: Journal Of Applied Animal Research [ISSN 0971-2119], v. 46 (1), p. 1505-1508
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