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The alcohol test applied to sterilized milk

Published online by Cambridge University Press:  01 June 2009

Constance Higginbottom  and
Margaret M. Taylor
Constance Higginbottom
Affiliation:
The Hannah Dairy Research Institute, Kirkhill, Ayr
Margaret M. Taylor
Affiliation:
The Hannah Dairy Research Institute, Kirkhill, Ayr
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Summary

A positive 80% alcohol test was not obtained in sterilized milks containing fewer than 105 bacteria/ml with Bacillus subtilis, B. licheniformis and B. cereus, and usually did not occur until the stationary phase of growth had been maintained for some days. A positive alcohol test with less than 105 bacteria/ml was associated with the lower maximum population density of B. brevis and B. circulans 152.

The alcohol test after 24 h at 37°C was found unreliable as an indicator of the keeping quality of sterilized milk at 22°C. The possibility of using the alcohol test after 3 days at 37°C or a bacterial count after the same incubation period is discussed briefly.

Type
Original Articles
Information
Journal of Dairy Research , Volume 27 , Issue 2 , June 1960 , pp. 259 - 265
Copyright
Copyright © Proprietors of Journal of Dairy Research 1960

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References

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