Abstract
The heat resistance (57.5–65 °C) of a three-strain cocktail of Clostridium perfringens vegetative cells in sous vide processed ground beef supplemented with 0–3% grape seed extract (GSE) was quantified. The surviving cell population was enumerated on tryptose–sulfite–cycloserine agar. The decimal reduction (D)-values in beef that included no GSE were 67.11, 17.15, 4.02, and 1.62 min at 57.5, 60, 62.5, and 65 °C, respectively. Addition of 1.0% GSE resulted in concomitant decrease in heat resistance as evidenced by reduced bacterial D-values. The D-values in beef with added 1.0% GSE were 62.89, 13.70, 3.47 and 1.46 min at 57.5, 60, 62.5, and 65 °C, respectively. The heat resistance was further decreased when the GSE concentration in beef was increased to 2 or 3%. The z-values in beef with or without GSE were similar, ranging from 4.41 to 4.56 °C. The results of this study would be beneficial to the retail and institutional food service establishments in estimating re-heating time and temperature for sous vide processed ground beef to ensure safety against C. perfringens.
Accepted Version (
Free)
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call