Abstract
Two enterotoxigenic strains of Staphylococcus aureus were examined for their ability to produce a number of extracellular enzymes at various water activity (alphaw) levels. Supernatant, dialyzed culture media were analyzed for total and relative levels of enzyme activity. With the exception of protease, enzyme activity was greatest in spent media obtained from cultures grown at 0.996 alphaw, the highest level tested. Enzyme activity in spent media from an enterotoxin B-producing strain was generally more sensitive to alphaw reduction than activity from an enterotoxin A-producing strain. Unlike the other enzymes assayed, acid and alkaline protease activities were greatest when the organism was grown at 0.94 alphaw.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Reference25 articles.
1. Abramson C. 1972. Staphylococcal enzymes p. 187-248. In J. 0. Cohen (ed.) The Staphylococci. Wiley Interscience New York.
2. A spectrophotometric method for measuring the breakdown of hydrogen by catalase;Beers R. F. Jr.;J. Biol. Chem.,1952
3. In vitro research on the effect of various antibiotics on the coagulase activity of staphylococcus;Castagnari L.;G. Bacteriol. Virol. Immunol.,1965
4. The sodium and potassium content of non-halophilic bacteria in relation to salt tolerance;Christian J. H. B.;J. Gen. Microbiol.,1961
5. Turbidimetric assay of staphylococcal nuclease;Erickson A.;Appl. Microbiol.,1973
Cited by
32 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献