Revista do Instituto de Latícinios Cândido Tostes (Nov 2019)
Nisin reduces the Staphylococcus aureus count without changing the characteristics of artisanal Minas cheese from Araxá
Abstract
Traditional Araxá cheese is produced with raw milk, which represents a risk to consumers’ health. The action of nisin (100 IU/g and 400 IU/g) against Staphylococcus aureus during the ripening of Artisanal Minas Cheeses from Araxá was evaluated, and nisin reduced the S. aureus count to less than 1 log CFU/g from the beginning to the end of ripening. Nisin slightly increased the pH and moisture content and decreased the fat content of Artisanal Minas Cheese from Araxá; however, with the lower bacteriocin concentration, these changes did not alter the ripening indexes, color, or texture parameters of the cheese, which changed only as a function of ripening. Nisin has the potential to limit the S. aureus growth in Artisanal Minas Cheese from Araxá, without changing the essential characteristics of this artisanal product.
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