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1998:
Ihnot A M; Roering A M; Wierzba R K; Faith N G; Luchansky J B
Behavior of Salmonella typhimurium DT104 during the manufacture and storage of pepperoni.
International journal of food microbiology 1998;
40(
1-2):.
Pepperoni batter (ca. 70% pork:30% beef) was prepared and subsequently inoculated with a six-strain cocktail (ca. 4.4 x 10(7) per gram batter) of Salmonella typhimurium DT104. After fermentation at 36 degrees C and 92% relative humidity (RH) to < or = pH 4.8, counts of the pathogen decreased by about 1.3 log10 units. An additional 1.6 log10 unit decrease was observed following drying at 13 degrees C and 65% RH to a moisture protein ratio (M/Pr) of 1.6:1. After storage of pepperoni sticks for 56 days under vacuum at 4 or 21 degrees C, counts of the pathogen were about 4.6 and 6.6 log10 units lower, respectively, compared with starting levels in the batter. These data establish that fermentation and drying result in about a 3.0 log10 reduction in numbers of S typhimurium DT104 in pepperoni sticks and that storage of pepperoni sticks under vacuum at ambient temperature is more severe on the pathogen than refrigerated storage.
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