Abstract
Abstract The aim of the study was to determine whether the physicochemical factors of the matrix and the traditional acid-set cheese-making conditions allow the growth of coagulase-positive staphylococci (CoPS) and the synthesis of enterotoxins, which should contribute to an objective risk assessment in cheese production related to CoPS. CoPS were isolated from 72% of acid-set cheeses ranging from 1.70 to 5.15 log10 CFU g−1. CoPS in a number ≥ 4 log10 CFU g−1 were determined in 5.56% of the acid-set cheese samples. Out of the total number of CoPS isolated from cheese, 37.62% of the isolates have been shown to produce enterotoxins. All isolated strains that produced enterotoxins were identified as Staphylococcus aureus based on the detection of spa gene by PCR. For cheese-derived isolates with CoPS number ≥ 4 log10 CFU g−1, it has been proven that they possess sec gene encoding staphylococcal enterotoxin C. According to our results, during the proper fermentation process of artisanal acid-set cheese, the conditions do not support the growth of a critical level of staphylococci or the production of enterotoxins.
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