Evaluation of 3 refractometers to determine transfer of passive immunity in neonatal beef calves
| Autor: | Jennifer M Pearson, Lisa Gamsjäger, Ibrahim Elsohaby, M. Claire Windeyer, Michel Levy, Edmond A. Pajor |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Immunodiffusion
040301 veterinary sciences medicine.medical_treatment Immunology Passive immunity Standard Article 030204 cardiovascular system & hematology FOOD AND FIBER transfer of passive immunity 0403 veterinary science 03 medical and health sciences immunoglobulin G 0302 clinical medicine Animal science Refractometer medicine Animals Brix beef calves Total protein Radial immunodiffusion General Veterinary business.industry Diagnostic Tests Routine 04 agricultural and veterinary sciences Standard Articles Refractometry refractometer Area Under Curve serum total protein Test performance Cattle business Kappa |
| Zdroj: | Journal of Veterinary Internal Medicine |
| ISSN: | 1939-1676 0891-6640 |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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