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  • Title: Evaluation of thermal inactivation parameters of Salmonella in whole wheat multigrain bread.
    Author: Channaiah LH, Michael M, Acuff JC, Phebus RK, Thippareddi H, Milliken G.
    Journal: Food Microbiol; 2019 Sep; 82():334-341. PubMed ID: 31027791.
    Abstract:
    This study was conducted to validate a simulated commercial whole wheat multigrain bread baking process at 375 °F (190.6 °C) oven temperature for 35 min to inactivate Salmonella, and to determine the thermal inactivation parameters of a 7-serovar Salmonella cocktail in whole wheat multigrain bread dough. A ≥5-log CFU/g reduction in Salmonella population was achieved by 15 min, and no viable Salmonella was detected after enrichment plating by 16 min. The aw of the bread crumb (0.96) after baking and 60 min of cooling was similar to that of pre-baked bread dough, whereas the aw of bread crust decreased to 0.81 at the end of baking and cooling. The D-values of the Salmonella cocktail in bread dough were 59.6, 20.0 and 9.7 min at 50, 52 and 55 °C, respectively; and the z-value was 6.5 °C.
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