Herd Composite Somatic Cell Counts: Average Linear Score and Weighted Average Somatic Cell Count Score and Milk Production

Abstract

The relationship between herd production weighted average somatic cell count (average of somatic cell count weighted by individual cow milk production) and average linear score (average of individual cow linear score somatic cell counts) was investigated using three models. The model with the highest R2 was log weighted average somatic cell count versus average linear score. Use of the regression model results to convert an average linear score to weighted average somatic cell count results in a bulk tank somatic cell count approximately twice that of conversion of a linear score somatic cell count when done on an individual cow basis. Rolling herd average milk decreased 190 kg as average linear score increased by 1.

Association between milk production, somatic cell count and bacterial dermatoses in three dairy cattle herds

“…27,28 A significant negative correlation between milk production and BMSCC has been established in the present study and has also been reported elsewhere. [29][30][31][32] Specific effort should be directed to prevent the occurrence of these and similar skin diseases. This 2nd edition of Veterinary Nursing, also edited by Lane and Cooper, is a single volume.…”

Sand bedded freestall and compost bedded pack effects on cow hygiene, locomotion, and mastitis indicators

“…Performance records from DHI were collected with the permission of participating producers including: test day milk production (kg/cow), weighted average herd SCC (average of somatic cell count weighted by individual cow milk production; cells/mL (Fetrow et al, 1988)), HSP (%), and number of animals in the lactating herd. Bulk tank SCC from every milk pick-up was obtained from fluid-milk buyers with producer permission.…”

Economic impacts of reduced milk production associated with an increase in bulk-tank somatic cell count on US dairies

“…N umerous reports [1][2][3][4][5][6][7][8][9] have documented that cows with mastitis (including subclinical infections) produce milk with an increased somatic cell count (SCC) and that increased SCCs are associated with reduced milk production per cow. A number of studies [10][11][12][13][14][15][16] have examined costs that dairy producers may incur as a result of increased SCC; however, these studies have generally focused on costs faced by each producer and did not consider the consequences of price effects nor the larger economic effects (including impacts on dairy producers and consumers) of reduced milk production associated with increased SCCs in dairy cows.…”