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. 1972 Mar;1(3):277–279. doi: 10.1128/aac.1.3.277

Effect of Secondary Metabolites on the Organisms Producing Them: Effect of Nisin on Streptococcus lactis and Enterotoxin B on Staphylococcus aureus

A Hurst 1, H Kruse 1
PMCID: PMC444206  PMID: 4625627

Abstract

The effect of secondary metabolites added to cultures of the organisms producing them was investigated. Nisin was added to growing cultures of a nisin-producing strain of Streptococcus lactis (354/07) and enterotoxin B to strains of Staphylococcus aureus (S6 and 243) producing enterotoxin B. One quarter (12 μg/ml) of the amount of nisin formed by the culture of S. lactis inhibited lag-phase cells and lysed log-phase cells. The same amount of nisin added before inoculation or at a time when nisin synthesis had started (in late log phase), caused only transient delay in growth. Inhibition of growth of the two enterotoxin B-producing strains of S. aureus could not be demonstrated at any stage of their growth cycle with as much as 1 mg of enterotoxin B per ml of medium.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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