Influence of water activity on the production of extracellular enzymes by Staphylococcus aureus
| Autor: | J V Stinson, J A Troller |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1978 |
| Předmět: |
Coagulase
Staphylococcus aureus Water activity medicine.medical_treatment Acid Phosphatase Enterotoxin Sodium Chloride medicine.disease_cause Applied Microbiology and Biotechnology Microbiology Enterotoxins medicine Extracellular chemistry.chemical_classification Protease Deoxyribonucleases Ecology Strain (chemistry) biology Chemistry Osmolar Concentration Water Lipase Catalase Enzyme assay Culture Media Enzyme biology.protein Food Science Biotechnology Research Article Peptide Hydrolases |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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