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Evaluation of 3 refractometers to determine transfer of passive immunity in neonatal beef calves

Authors :
Jennifer M Pearson
Lisa Gamsjäger
Ibrahim Elsohaby
M. Claire Windeyer
Michel Levy
Edmond A. Pajor
Source :
Journal of Veterinary Internal Medicine
Publication Year :
2020
Publisher :
John Wiley & Sons, Inc., 2020.

Abstract

Background Refractometry is used to assess transfer of passive immunity (TPI), but studies evaluating different refractometers and appropriate thresholds for recommended target immunoglobulin G (IgG) concentrations for beef calves are limited. Objectives To evaluate test performance of digital (DSTP) and optical (OSTP) serum total protein (STP) refractometers and a digital Brix (DBRIX) refractometer for assessment of passive immunity in beef calves. Animals A total of 398 beef calves from 6 herds, 1 to 7 days of age. Methods Serum IgG concentration was estimated by DSTP, OSTP, and DBRIX, and measured by radial immunodiffusion (RID). Correlation coefficients (r) among results were calculated. Optimal STP and Brix thresholds for identification of IgG

Details

Language :
English
ISSN :
19391676 and 08916640
Volume :
35
Issue :
1
Database :
OpenAIRE
Journal :
Journal of Veterinary Internal Medicine
Accession number :
edsair.doi.dedup.....de9d3440fa19d82515f5530de0ed8778