Reference : Comparison of Four Refractometers for the Investigation of the passive transfer in Be...
Scientific journals : Article
Life sciences : Veterinary medicine & animal health
http://hdl.handle.net/2268/103439
Comparison of Four Refractometers for the Investigation of the passive transfer in Beef Calves
English
[fr] Comparaison de 4 réfractomètres pour l'évaluation du transfert de l'immunité colostrale chez les veaux de race viandeuse
Vandeputte, Sébastien mailto [Université de Liège - ULg > Département clinique des animaux de production (DCP) > Médecine interne des équidés, des ruminants et des porcs > > >]
Detilleux, Johann mailto [Université de Liège - ULg > Département de productions animales > Génétique quantitative >]
Rollin, Frédéric mailto [Université de Liège - ULg > Département clinique des animaux de production (DCP) > Médecine interne des équidés, des ruminants et des porcs >]
2011
Journal of Veterinary Internal Medicine
Allen Press
25
1465-1469
Yes (verified by ORBi)
International
0891-6640
Lawrence
KS
[en] Colostral immunity ; Refractometry ; Serum protein ; Failure of passive transfer
[en] Background: Failure of passive transfer (FPT) in beef calves can be detected by refractometry. Nevertheless, different models of refractometers are available, and few studies compare them for the detection of FPT.
Objectives: To compare the accuracy of 4 different refractometers for measuring serum total protein concentrations in comparison with results obtained by the biuret method and, based on the serum IgG threshold of 1,600 mg/mL, to determine, for each refractometer, the optimal serum protein concentration’s lowest threshold for successful passive transfer.
Animals: One hundred and eight healthy beef calves, 3–8 days of age.
Methods: Observational study. The concentrations of serum total proteins were determined with 4 different models of refractometers and compared with the biuret method by a Bland–Altman statistical method. The optimal serum protein concentration’s lowest threshold for successful passive transfer was determined for each refractometer by receiver operating characteristic (ROC) analysis. In addition, the serum immunoglobulin G (IgG) concentration was compared with the serum gamma-glutamyl transferase (c-GT) activity and with the total immunoglobulin concentration.
Results: The refractometric measurements were highly correlated with those obtained by the biuret method. Serum total protein concentration threshold values of 56, 58, 54, and 56 g/L were found respectively for the Atago, Atago ATC, Wolf ATC, and digital ATC refractometers. Immunoglobulins were highly correlated with IgG, whereas Gamma-GT only reflected colostrum uptake by the calf.
Conclusions and Clinical Importance: All refractometers could be used for the assessment of passive transfer using their individual serum protein concentration threshold.
Researchers ; Professionals ; Students ; General public ; Others
http://hdl.handle.net/2268/103439
10.1111/j.1939-1676.2011.00816.x

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