Sensitivity and specificity of infrared thermography in detection of subclinical mastitis in dairy cows

Journal of Dairy Science
Bulent PolatA Hayirli

Abstract

The objectives of this experiment were to determine interrelationships among mastitis indicators and evaluate the subclinical mastitis detection ability of infrared thermography (IRT) in comparison with the California Mastitis Test (CMT). Somatic cell count (SCC), CMT, and udder skin surface temperature (USST) data were compiled from 62 Brown Swiss dairy cows (days in milk=117+/-51, milk yield=14.7+/-5.2 kg; mean +/- SD). The CORR, REG, and NLIN procedures of Statistical Analysis System (SAS Institute Inc., Cary, NC) were employed to attain interrelationships among mastitis indicators. The diagnostic merit of IRT as an indirect measure of subclinical mastitis was compared with CMT using the receiver operating characteristics curves. The udder skin surface temperature was positively correlated with the CMT score (r=0.86) and SCC (r=0.73). There was an exponential increase in SCC (SCC, x10(3) cells/mL=22.35 x e(1.31 x CMT score); R(2)=0.98) and a linear increase in USST (USST, degrees C=33.45+1.08 x CMT score; R(2)=0.75) as the CMT score increased. As SCC increased, USST increased logarithmically [USST, degrees C=28.72+0.49 x ln(SCC, x10(3) cells/mL); R(2)=0.72]. The USST for healthy quarters (SCC <or=400,000 cells/mL; n=94) was ...Continue Reading

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Citations

Oct 15, 2013·Journal of Veterinary Internal Medicine·T KarapinarM Kom
Dec 29, 2015·American Journal of Veterinary Research·Steven I RekantLuis L Rodriguez
Apr 22, 2014·Journal of Dairy Science·A ReesW Heuwieser
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Aug 22, 2020·Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere·Carola Fischer-Tenhagen, Sebastian P Arlt
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Aug 28, 2021·Animals : an Open Access Journal From MDPI·Daniel Mota-RojasJulio Martínez-Burnes

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