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385. Growth requirements of lactic streptococci. Differences within the group

Published online by Cambridge University Press:  01 June 2009

G. J. E. Hunter
G. J. E. Hunter
Affiliation:
The Dairy Research Institute (N.Z.), Palmerston North, New Zealand
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Extract

A variety of lactic streptococcus which is unusual in its growth requirements is described. The culture grows on an agar medium (based on B.D.H. peptone) only under conditions of semi-anaerobiosis. It will grow on the surface, however, if the medium is altered in certain respects, for example: (a) if the B.D.H. peptone is replaced by tryptone, the only peptone which appears to stimulate rapid aerobic growth of the organism; or (b) the lactose in the medium is replaced by glucose; or (c) the pH of the medium is reduced.

Different metabolic mechanisms appear to be involved according to the composition of the medium.

The culture is more sensitive to changes in milk composition than are other strains of lactic streptococci.

Type
Original Articles
Information
Journal of Dairy Research , Volume 16 , Issue 2 , October 1949 , pp. 152 - 160
Copyright
Copyright © Proprietors of Journal of Dairy Research 1949

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References

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