Diagnostic accuracy of digital Brix and serum total protein refractometers in estimating different passive immunity levels in dairy calves

The aim of this study was to determine the diagnostic accuracy of digital serum total protein (TP) and digital Brix refractometers in estimating different passive immunity levels (<10, <18, <25 mg/mL) in dairy calves. Blood samples were collected from 260 apparently healthy Holstein calves,...

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Published inVeterinary immunology and immunopathology Vol. 249; p. 110442
Main Authors Akköse, Mehmet, Kutsal, Hüseyin Gökhan, Kurban, Mert, Çinar, Elif Merve, Polat, Yadigar, Cengiz, Murat
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 01.07.2022
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Abstract The aim of this study was to determine the diagnostic accuracy of digital serum total protein (TP) and digital Brix refractometers in estimating different passive immunity levels (<10, <18, <25 mg/mL) in dairy calves. Blood samples were collected from 260 apparently healthy Holstein calves, aged 2–7 days. Serum IgG concentrations were measured using digital Brix and TP refractometers and the radial immunodiffusion (RID) assay, as the gold standard. Data were analyzed by a receiver operating characteristics (ROC) analysis, the area under the ROC curves (AUC) and Cohen's kappa (κ). Optimal thresholds were determined as < 8.4, < 9.0 and < 9.4% for the digital Brix refractometer, and < 5.0, < 5.4 and < 5.8 g/dL for the serum TP refractometer in estimating IgG concentrations of < 10, < 18, < 25 mg/mL, respectively. The sensitivity (Se) and specificity (Sp) of the Brix refractometer were 96.3% and 88.8% for < 8.4% Brix, 97.0% and 83.4% for < 9.0% Brix, and 85.5% and 77.8% for < 9.4% Brix, respectively. The Se and Sp of the serum TP refractometer were 96.3% and 90.1% for < 5.0 g/dL, 91.0% and 89.6% for < 5.4 g/dL, 79.6% and 85.2% for < 5.8 g/dL, respectively. The discriminant ability of the refractometers was moderately accurate in estimating IgG concentrations of < 10 and < 18 mg/mL, and highly accurate in estimating IgG concentrations of < 25 mg/mL. Both refractometers substantially agreed with RID-IgG results and almost perfectly agreed with each other. In conclusion, the digital Brix and digital serum TP refractometers offer a good utility for determining different passive immunity levels in dairy calves.
AbstractList The aim of this study was to determine the diagnostic accuracy of digital serum total protein (TP) and digital Brix refractometers in estimating different passive immunity levels (<10, <18, <25 mg/mL) in dairy calves. Blood samples were collected from 260 apparently healthy Holstein calves, aged 2–7 days. Serum IgG concentrations were measured using digital Brix and TP refractometers and the radial immunodiffusion (RID) assay, as the gold standard. Data were analyzed by a receiver operating characteristics (ROC) analysis, the area under the ROC curves (AUC) and Cohen's kappa (κ). Optimal thresholds were determined as < 8.4, < 9.0 and < 9.4% for the digital Brix refractometer, and < 5.0, < 5.4 and < 5.8 g/dL for the serum TP refractometer in estimating IgG concentrations of < 10, < 18, < 25 mg/mL, respectively. The sensitivity (Se) and specificity (Sp) of the Brix refractometer were 96.3% and 88.8% for < 8.4% Brix, 97.0% and 83.4% for < 9.0% Brix, and 85.5% and 77.8% for < 9.4% Brix, respectively. The Se and Sp of the serum TP refractometer were 96.3% and 90.1% for < 5.0 g/dL, 91.0% and 89.6% for < 5.4 g/dL, 79.6% and 85.2% for < 5.8 g/dL, respectively. The discriminant ability of the refractometers was moderately accurate in estimating IgG concentrations of < 10 and < 18 mg/mL, and highly accurate in estimating IgG concentrations of < 25 mg/mL. Both refractometers substantially agreed with RID-IgG results and almost perfectly agreed with each other. In conclusion, the digital Brix and digital serum TP refractometers offer a good utility for determining different passive immunity levels in dairy calves.
ArticleNumber 110442
Author Kurban, Mert
Cengiz, Murat
Akköse, Mehmet
Kutsal, Hüseyin Gökhan
Polat, Yadigar
Çinar, Elif Merve
Author_xml – sequence: 1
  givenname: Mehmet
  surname: Akköse
  fullname: Akköse, Mehmet
  email: akkosem2012@gmail.com
  organization: Department of Livestock, Dalaman Agricultural Enterprise, General Directorate of Agricultural Enterprises, 48770, Dalaman, Muğla, Türkiye
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  givenname: Hüseyin Gökhan
  surname: Kutsal
  fullname: Kutsal, Hüseyin Gökhan
  organization: Department of Livestock, Gökhöyük Agricultural Enterprise, General Directorate of Agricultural Enterprises, 05100, Amasya, Turkiye
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  givenname: Mert
  surname: Kurban
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  organization: Department of Livestock, Dalaman Agricultural Enterprise, General Directorate of Agricultural Enterprises, 48770, Dalaman, Muğla, Türkiye
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  givenname: Elif Merve
  surname: Çinar
  fullname: Çinar, Elif Merve
  organization: Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Dicle University, 21280, Sur, Diyarbakır, Türkiye
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  givenname: Yadigar
  surname: Polat
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  givenname: Murat
  surname: Cengiz
  fullname: Cengiz, Murat
  organization: Department of Livestock, Dalaman Agricultural Enterprise, General Directorate of Agricultural Enterprises, 48770, Dalaman, Muğla, Türkiye
BackLink https://www.ncbi.nlm.nih.gov/pubmed/35662038$$D View this record in MEDLINE/PubMed
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Keywords IgG
Serum total protein
Brix refractometer
Calf
Transfer of passive immunity
Language English
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Snippet The aim of this study was to determine the diagnostic accuracy of digital serum total protein (TP) and digital Brix refractometers in estimating different...
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StartPage 110442
SubjectTerms Brix refractometer
Calf
IgG
Serum total protein
Transfer of passive immunity
Title Diagnostic accuracy of digital Brix and serum total protein refractometers in estimating different passive immunity levels in dairy calves
URI https://dx.doi.org/10.1016/j.vetimm.2022.110442
https://www.ncbi.nlm.nih.gov/pubmed/35662038
https://search.proquest.com/docview/2673600643
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