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  • Title: Growth of Staphylococcus aureus and synthesis of enterotoxins in home-made yoghurt.
    Author: Orden JA, Goyache J, Blanco JL, Javier Hernández F, Doménech A, Suárez G, Gómez-Lucía E.
    Journal: Z Lebensm Unters Forsch; 1989 Jul; 189(1):16-20. PubMed ID: 2781867.
    Abstract:
    Staphylococcus aureus strains FRI-100, S6, FRI-137 and FRI 472 were inoculated into milk to study growth and enterotoxin production in home-made yogurts. The yogurt used as starter was progressively weakened by successive inoculations (up to four) in milk to prepare other yogurts in order to study the ability of yogurt microflora to inhibit staphylococci. After elaboration, yogurts were stored at 4 degrees C, 22 degrees C, and 37 degrees C for a maximum of 21 days. Periodically, staphylococcal counts, pH and the production of enterotoxins A, B, C, and D were determined. Enterotoxins were only detected in the last batch. It was concluded that the inhibitory effect of the starter culture is not only due to the decrease of pH, but also to other factors.
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