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. 1972 Oct;24(4):561–566. doi: 10.1128/am.24.4.561-566.1972

Effect of Shaking Speed on the Secretion of Enterotoxin B by Staphylococcus aureus

Glynn G Dietrich 1, Robert J Watson 1, Gerald J Silverman 1
PMCID: PMC380613  PMID: 4628794

Abstract

The concentration of enterotoxin B secreted by four strains of Staphylococcus aureus was dependent upon the shaking speed. For the conditions established, each strain demonstrated an optimal shaking speed, and speeds in excess of the optimum resulted in decreased secretion of toxin. At the optimal shaking speed, maximum secretion occurred at 37 C. At 45 C, both growth and toxin secretion were absent. By using agar containing antienterotoxin B sera, studies with strain S-6 at optimal and suboptimal shaking speeds demonstrated that individual cells vary in their toxin-synthesizing ability and that the relative numbers of high and low producers change during the growth cycle. Although most of the toxin was secreted during the first 12 hr of growth, a portion was secreted during the subsequent 6 hr, even though growth as measured by colony-forming units per milliliter decreased and Klett units increased.

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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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