GROWTH OF ENTEROTOXIGENIC  STAPHYLOCOCCUS AUREUS  TYPE A AND ITS POTENTIAL TOXIN PRODUCTION IN SALTED CHEESE WHEY.

Growth of Staphylococcus aureus strain no. 743 and its production of enterotoxin A (ent. A), thermonuclease (TNase) and β-hemolysin were studied in cheese whey containing zero, 5, 10,15 and 20% salt during incubation at 37°C for 48 h. Results revealed that the concentration of salt less than 10% promotes S. aureus growth and production of ent. A, TNase and β-hemolysin. In the presence of high concentrations of salt (15-20%), growth was inhibited and ent. A production was incompletely repressed, while TNase and β-hemolysin activities were completely inhibited. It is concluded that using unsalted or salted cheese whey containing S. aureus, in preparing any other kind of food related commodity is dangerous. Furthermore, TNase and β-hemolysis tests are unreliable as indicators for tracing enterotoxin A in dairy products containing more than 10% salt.

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eISSN:	2083-6007
ISSN:	1230-0322

W latach 2022-2024 kwartalnik naukowy Polish Journal of Food and Nutrition Sciences realizuje projekt nr RCN/SP/0520/2021/1 finansowany ze środków budżetu państwa – Ministerstwo Edukacji i Nauki w ramach programu „Rozwój czasopism naukowych”. Dofinansowanie wynosi 120 000 zł. W ramach projektu podejmowane są działania zmierzające do podniesienia poziomu praktyk wydawniczych i edytorskich, zwiększenia wpływu czasopism na rozwój nauki oraz utrzymania się czasopism w międzynarodowym obiegu naukowym.

In the years 2022-2024, the scientific quarterly Polish Journal of Food and Nutrition Sciences accomplishes a project no. RCN/SP/0520/2021/1 financed from the state budged – Ministry of Education and Science Republic of Poland in the framework of a program “Development of scientific journals”. The financing amounts to 120,000 PLN. The program aims at improving the level of publishing and editing practices, increasing the impact of scientific journals on science development, and extending the international range of scientific journals.