JDS
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Journal of Dairy Science Vol. 74 No. 8 2479-2483
© 1991 by American Dairy Science Association ®
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Emanuelson, U.
Right arrow Articles by Funke, H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Emanuelson, U.
Right arrow Articles by Funke, H.

Effect of Milk Yield on Relationship Between Bulk Milk Somatic Cell Count and Prevalence of Mastitis

Ulf Emanuelson 1 and Hans Funke 1

1 Swedish Association for Livestock Breeding and Production, S-631 84 Eskilstuna, Sweden

The possible dilution effect of increasing milk yield on bulk milk SCC was studied in a field trial. Data on breed distribution, numbers of cows, average milk yields, average bulk milk SCC, and estimated prevalences of mastitis were available for 15,514 Swedish dairy herds. The overall mean of herd prevalence of mastitis, as estimated by the definition employed, was 26.7%, and the overall mean of the geometric average of bulk milk SCC was 204,000 cells/ml. Correlations between prevalence of mastitis and average bulk milk SCC ranged between .53 and .77, and geometric averages were only marginally more correlated to prevalence of mastitis than were arithmetic averages. The average herd prevalence of mastitis was found to increase, within bulk milk SCC level, as milk production increased. The regression coefficients of average milk yield on bulk milk SCC, estimated conditionally on mastitis prevalence, show that the bulk milk SCC decreased by 11.1% for each increase in the milk yield of 1000 kg of FCM. This implies that part of the decrease in average bulk milk SCC achieved during recent years may be an artifact due to the concurrent increase in milk production.

Key Words: cell count • milk yield • mastitis

Submitted on November 20, 1990
Accepted on April 17, 1991




This article has been cited by other articles:


Home page
 J DAIRY SCIHome page
D. P. Berry, B. O'Brien, E. J. O'Callaghan, K. O. Sullivan, and W. J. Meaney
Temporal trends in bulk tank somatic cell count and total bacterial count in irish dairy herds during the past decade.
J Dairy Sci, October 1, 2006; 89(10): 4083 - 4093.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
J. M. Lukas, D. M. Hawkins, M. L. Kinsel, and J. K. Reneau
Bulk Tank Somatic Cell Counts Analyzed by Statistical Process Control Tools to Identify and Monitor Subclinical Mastitis Incidence
J Dairy Sci, November 1, 2005; 88(11): 3944 - 3952.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
J. P. Valde, O. Osteras, and E. Simensen
Description of Herd Level Criteria for Good and Poor Udder Health in Norwegian Dairy Cows
J Dairy Sci, January 1, 2005; 88(1): 86 - 92.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1991 by the American Dairy Science Association ®.