Abstract
Irradiated beef (whole muscle and ground product with identical fat, protein, and moisture composition) was exposed to a Salmonella-inoculated marinade and heated in brass tubes in a water bath at 55 °C, 60 °C, and 62.5 °C. The bacterial load and thermal lag time were similar ( = 0.05) for both whole and ground muscle; therefore, all samples had equivalent composition, inoculation levels, and thermal histories. Assuming 1st-order kinetics, the inactivation rate constants (k values) in whole muscle were 50% lower than those in ground product at each temperature (P = 0.0001), and Arrhenius-type models described the temperature dependency of k (R2 > 0.95). Because thermal processing regulations are generally based on ground product studies, thermal process validations for meat and poultry products may need to consider the physical state (whole -muscle versuss. ground) of the product being manufactured.
Original language | English |
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Pages (from-to) | m359-m362 |
Number of pages | 4 |
Journal | Journal of Food Science |
Volume | 70 |
Issue number | 7 |
Publication status | Published - 2005 |
Keywords
- Thermal resistance, Salmonella, whole muscle, ground meat