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Iron and vanadium requirements of lactic acid streptococci

Published online by Cambridge University Press:  01 June 2009

B. Reiter  and
J. D. Oram
B. Reiter
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
J. D. Oram
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
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Extract

Lactic acid streptococci have an absolute requirement for magnesium and potassium and failed to grow in milk deionized with IRC 50 resin (sodium form) (Reiter unpublished; see also Fisons, 1958; Reiter, 1956). These findings were confirmed in preliminary experiments using the defined medium of Reiter & Oram (1962). Requirements for other metal ions have now been investigated. Two strains of Streptococcus lactis (ML3 and C10) and one of Streptococcus cremoris (HP) were used. They were maintained as milk cultures, and before use subcultured twice in the synthetic medium containing Ca, Mg, Fe, Zn, Mn, Co, Cu and Mo (cf. Reiter & Oram, 1962) and then finally in the synthetic medium containing only Mg and K (20 ppm.), and Fe (0·01 ppm.).

Type
Original Articles
Information
Journal of Dairy Research , Volume 35 , Issue 1 , February 1968 , pp. 67 - 69
Copyright
Copyright © Proprietors of Journal of Dairy Research 1968

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References

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