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Appl Environ Microbiol. 1971 March; 21(3): 435-439
Copyright © 1971 American Society for Microbiology. All Rights Reserved.

Effect of Water Activity on Enterotoxin B Production and Growth of Staphylococcus aureus

John A. Troller

Winton Hill Technical Center, Procter & Gamble Company, Cincinnati, Ohio 45239

ABSTRACT

Staphylococcus aureus C-243, an enterotoxin B-producing strain, was cultured on media adjusted to various water activity (aw) levels by means of two different solute systems. Total numbers and rate of growth were diminished at low aw levels, and enterotoxin synthesis was extremely sensitive to reduction in aw. A reduction of aw from 0.99 to 0.98 in one medium and from 0.99 to 0.97 in the other medium resulted in extremely low levels of enterotoxin in spent culture media despite the attainment of high numbers of staphylococci.

Appl Environ Microbiol. 1971 March; 21(3): 435-439
Copyright © 1971 American Society for Microbiology. All Rights Reserved.





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Copyright © 1971 by the American Society for Microbiology. All rights reserved.