Somatic cell count assessment at the quarter or cow milking level

Journal of Dairy Science
H MollenhorstH Hogeveen

Abstract

The aim was to investigate whether on-line somatic cell count (SCC) assessment, when combined with electrical conductivity (EC), should be implemented at the udder quarter or at the cow level. Data were collected from 3 farms with automatic milking systems, resulting in 3,191 quarter milkings used in the analyses. Visual observations of foremilk and quarter milk samples for laboratory SCC analysis were used to define 2 gold standards. One was based on visual observation only and the other was based on a combination of visual observation and SCC (using a reference value of 500,000 cells/mL), which means that a quarter milking must have visually abnormal milk as well as an increased SCC to be categorized positive. On-line SCC assessment took place at the quarter level during the first part of the milking. Composite cow level samples were used for laboratory SCC analysis and to compare the performance of SCC assessment at quarter and cow levels. The EC at the quarter level was measured by in-line sensors of the automatic milking system. Alerts for SCC indicators were calculated based on straightforward reference values. Alerts for EC were based on straightforward reference values, or on interquarter ratios. The latter was calculat...Continue Reading

References

Jul 1, 1989·Medical Decision Making : an International Journal of the Society for Medical Decision Making·D K McClish
Mar 10, 2001·Journal of Dairy Science·R M de Mol, W E Woldt
Mar 8, 2005·The Journal of Dairy Research·David WhyteGraeme Mein
Oct 13, 2006·Journal of Dairy Science·H Sarikaya, R M Bruckmaier

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Citations

Jul 5, 2013·The Journal of Dairy Research·Bettina MiekleyJoachim Krieter
Jan 1, 2010·Sensors·Henk HogeveenHerman Mollenhorst
Mar 7, 2013·Journal of Dairy Science·C J RuttenH Hogeveen
Sep 3, 2018·Journal of Dairy Science·Dan B JensenHenk Hogeveen
May 16, 2020·Frontiers in Veterinary Science·Zhaoju DengGerrit Koop
Jul 27, 2021·Journal of Dairy Science·M van der VoortH Hogeveen
Jul 27, 2021·Journal of Dairy Science·Henk HogeveenMaria Sánchez Mainar

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