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The pyruvate test for monitoring the bacteriological quality of raw silo tank milk

Published online by Cambridge University Press:  01 June 2009

Christina M. Cousins ,
Ubaldina M. Rodrigues  and
Rosemary J. Fulford
Christina M. Cousins
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, RG2 9AT
Ubaldina M. Rodrigues
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, RG2 9AT
Rosemary J. Fulford
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, RG2 9AT
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Summary

Samples of milk from silo tanks were stored at refrigeration temperatures and examined at intervals for pyruvate content and total colony count. Significant relationships between pyruvate, μg/ml, and log colony forming units (cfu)/ml were established for samples stored at 2°C for 2, 3 and 4 d (3, 4 and 5 d of age respectively) but at 5 and 7°C the relationships after 2-d storage (3 d of age) were not significant. From an overall relationship it was predicted that 4 μg pyruvate/ml would correspond to a bacterial content of 3·7 x 106 cfu/ml with 95% confidence limits of 6·6 x 10 cfu/ml. 2·1 x 107 cfu/ml.

Type
Original Articles
Information
Journal of Dairy Research , Volume 48 , Issue 1 , February 1981 , pp. 45 - 50
Copyright
Copyright © Proprietors of Journal of Dairy Research 1981

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References

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