Somatic cell count dynamics in a large sample of dairy herds in England and Wales

Preventive Veterinary Medicine
A MadouasseM J Green

Abstract

An essential reason to record and evaluate patterns of cow somatic cell count (SCC) within a dairy herd is to help in making clinical decisions on the control of mastitis. An understanding of when new infections occur and how patterns of infection influence herd bulk milk somatic cell count (BMSCC) are critical when implementing mastitis control because it enables advisors to target specific problem areas. The objective of this research was to evaluate individual cow SCC patterns in terms of their contribution to BMSCC. Data collected in 2128 herds from England and Wales between 2004 and 2006 were used. Cows were categorised as having a low, medium or high SCC based on thresholds of 100,000 cells/mL and 200,000 cells/mL. Movements between these categories in consecutive months, before or after 30 days in milk, in primiparous (heifers) and multiparous cows (cows) were used to predict BMSCC. From these categories, new variables representing different SCC patterns, were calculated and included in different models: the medium SCC category was grouped with either the low or the high category, and the denominator was either the total number of cows recorded during the herd-year or the number of cows eligible for a particular transiti...Continue Reading

References

May 5, 2009·Preventive Veterinary Medicine·J C F PantojaP L Ruegg
Sep 18, 2009·The Journal of Dairy Research·Jan LievaartWim Kremer

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Citations

Jun 13, 2012·The Journal of Dairy Research·Didier RaboissonGilles Allaire
Aug 16, 2015·BMC Veterinary Research·Funmilola Clara ThomasPeter David Eckersall
Mar 7, 2012·Preventive Veterinary Medicine·A MadouasseM J Green
Apr 25, 2016·Journal of Dairy Science·A C HendersonM J Green
Jan 11, 2012·The Journal of Veterinary Medical Science·Jan Olechnowicz, Jedrzej M Jaśkowski
Feb 3, 2021·Preventive Veterinary Medicine·R E NiemiP J Rajala-Schultz

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