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Variations in dairy cattle somatic cell counts during lactation

Published online by Cambridge University Press:  24 November 2017

E. Mohammedi ,
A. Sword  and
D. J. Roberts
E. Mohammedi
Affiliation:
Grassland and Ruminant Science Department, SAC, Auchincruive, Ayr KA6 5HW
A. Sword
Affiliation:
SAC and Scottish Agricultural Statistical Services
D. J. Roberts
Affiliation:
Grassland and Ruminant Science Department, SAC, Auchincruive, Ayr KA6 5HW
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Extract

Somatic cell count of milk is a well established test of monitoring udder subclinical mastitis in dairy cattle. Its diurnal variation has been known for decades, (SMITH and SHULTZE 1967). However the association of somatic cell count to time of sampling has been poorly investigated (AOKI et al 1990), and little emphasis has been given to the representativity of samples for a period of 24h. By concentrating on the study of differences between morning and evening milkings throughout lactation, the objective of the current study was to stress the need for a standard representative sampling time, to avoid possible bias in the interpretation of somatic cell count data, whether for research purposes or routine health surveys.

Type
Dairy Production
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1992 , March 1992 , pp. 120
Copyright
Copyright © The British Society of Animal Production 1992

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References

Aoki, Y., Notsuki, I., Ichikawa, T., Ichikawa, M. and Nakano, T. (1990) Diurnal Variation In Count And Composition Of Somatic Cells In Milk And Characteristics Related To Infection In International Symposium On Bovine Mastitis. Indianapolis, Indiana U.S.A. Sept. 13-16 1990Google Scholar
Smith, J.W. and Schultze, W.D. (1967). Variation In Cell Content Of Milk With Time Of Sample Collection. I. Diurnal Variation J. Dairy Sci. 50 1083:1087 (1967)Google Scholar
Thomas, P.C. and Rook, J.A.F. (1983) Nutritional Physiology Of Farm Animals. Milk Production Ed.Longman Google Scholar