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221. The effect of serum and blood on the growth of lactic acid bacteria in milk

Published online by Cambridge University Press:  01 June 2009

J. G. Davis
J. G. Davis
Affiliation:
National Institute for Research in Dairying, University of Reading
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Extract

Generally speaking, serum and blood do not have a marked effect on the growth of lactic acid bacteria in milk, although certain types appear to be specifically stimulated or inhibited. Heated serum and, to a greater extent, heated blood, usually stimulate growth.

Unheated serum may inhibit certain types, e.g. Str. lactis, when a small inoculum of washed cells is used. Under conditions similar to those in practice, no effect was noticeable. It is unlikely, therefore, that “slow starter” is ever attributable to infiltration of serum or the constituents of serum.

Small amounts of dextrose are without effect on growth (apart from fermentation of the added sugar) and do not initiate the fermentation of lactose.

Type
Original Articles
Information
Journal of Dairy Research , Volume 10 , Issue 2 , May 1939 , pp. 196 - 201
Copyright
Copyright © Proprietors of Journal of Dairy Research 1939

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References

REFERENCES

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