Salmonella Typhimurium, Enteritidis, Infantis and Derby in pasty dulce de leche

In order to evaluate the fate of Salmonella Typhimurium, Enteritidis, Infantis and Derby in pasty dulce de leche, aliquots of this sweet were experimentally contaminated with these pathogenic microorganisms at 102 bacterial cells per gram, and later analysed to evaluate microorganism count after storage for 0, 1, 2, 3, 5, 10 and 20 days. Salmonella Enteritidis was able to survive for up to 20 days in dulce de leche, while Salmonella Typhimurium and Infantis for five and ten days, respectively, and serotype Derby for three days. The Salmonella serotypes studied showed different adaptive capabilities regarding population growth in pasty dulce de leche, though all representing potential hazard to the consumer's health. The results are a warning regarding the need to take the appropriate hygienic-sanitary practices during dulce de leche manufacture, packing and handling.