Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-23T06:59:04.530Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of milking machine factors on the somatic cell count of milk from cows free of intramammary infection: I. Vacuum fluctuations

Published online by Cambridge University Press:  01 June 2009

George R. Olney ,
George W. Scott  and
Robert K. Mitchell
George R. Olney
Affiliation:
Department of Agriculture, South Perth, Western Australia, 6151
George W. Scott
Affiliation:
Department of Agriculture, South Perth, Western Australia, 6151
Robert K. Mitchell
Affiliation:
Department of Agriculture, Bunbury, Western Australia, 6230
Get access Rights & Permissions [Opens in a new window]

Summary

The effect of vacuum fluctuations during milking on the somatic cell count of milk from cows free of intramammary infections was determined. Four vacuum fluctuation treatments were compared using a Latin square design with 20 cows being milked at each of the 4 treatments for a continuous period of 12 d. The vacuum fluctuations were designed to simulate the depressions in vacuum that occur when applying teatcups during milking. In the most severe treatment the vacuum level fell from 50 to 14 kPa. The somatic cell count was not affected by vacuum fluctuation treatment and it is concluded that vacuum fluctuations will not cause an increase in the somatic cell count of milk in the absence of mastitis infections.

Type
Original Articles
Information
Journal of Dairy Research , Volume 50 , Issue 2 , May 1983 , pp. 135 - 140
Copyright
Copyright © Proprietors of Journal of Dairy Research 1983

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Klastrup, O., Schmidt Madsen, P., Nielsen, S. M.Madsen, N. P., Klausen, K. G., Dalsgaard, H., Jorgensen, K. & Horvath, Z. 1974 The effect of vacuum fluctuation on udder health and milking performance. 19th International Dairy Congress, New Delhi 1E 137–138Google Scholar
International Organization for Standardization 1977 Milking machine installations - vocabulary. ISO 3918. Switzerland: ISOGoogle Scholar
O'Callaghan, E., O'Shea, J., Meaney, W. J. & Crowley, C. 1976 Effect of milking machine vacuum fluctuations and liner slip on bovine mastitis infectivity. Irish Journal of Agricultural Research 15 401–418Google Scholar
Olney, G. R. & Mitchell, R. K. 1983 Effect of milking machine factors on the somatic cell count of milk from cows free of intramammary infection. II. Vacuum level and overmilking. Journal of Dairy Research 50 141–148CrossRefGoogle Scholar
Olney, G. R. & Scott, G. W. 1983 Effect of milking machine factors on the somatic cell count of milk from cows free of intramammary infection. III. Pulsator rate. Journal of Dairy Research 50 149–152CrossRefGoogle Scholar
O'Shea, J., O'Callaghan, E. & Meaney, W. J. 1979 Relationship between machine milking and the incidence of mastitis in dairy cows. Irish Journal of Agricultural Research 18 225–235Google Scholar
O'Shea, J., O'Callaghan, E., Meaney, W. J. & Crowley, C. 1976 Effect of combinations of large and small irregular and cyclic vacuum fluctuations in the milking machine on the rate of new udder infection in dairy cows. Irish Journal of Agricultural Research 15 377–399Google Scholar
O'Shea, J. & Walshe, M. J. 1970 Relationship between milking machine vacuum fluctuations and udder disease. Irish Journal of Agricultural Research 9 279–299Google Scholar
Thiel, C. C., Cousins, C. L., Westgarth, D. R. & Neave, F. K. 1973 The influence of some physical characteristics of the milking machine on the rate of new mastitis infections. Journal of Dairy Research 40 117–129CrossRefGoogle ScholarPubMed