TY - JOUR
T1 - Pressure- vs. heat-induced bacterial stress in cooked poultry sausages: A preliminary study
AU - Yuste, J.
AU - Mor-Mur, M.
AU - Capellas, M.
AU - Pla, R.
PY - 1999/11/29
Y1 - 1999/11/29
N2 - Vacuum-packaged poultry cooked sausages were pressure-treated at 500 MPa by combinations of time (5-45 min) and temperature (2-80°C) and later stored at 6-8°C for 12 we. Mesophile and psychrotrophe counts were determined 1 d, 3, 6, 9 and 12 we after treatment and compared with those of cooked sausages pasteurized at 80-85°C for 40 min. Both pressure and heat treatments offer great possibilities for preservation. Sausages pressurized at 65°C for 15 min showed mesophile numbers below 2 log cfu g-1 throughout the chill storage. Pressurization, unlike heat treatment, causes a reversible bacterial stress. Thus, injured cells recovered during storage and, at 6 and 12 we, after a temperature abuse (room temperature for approx. 24 h), counts increased up to 6.5-7.5 log units. Psychrotrophes were more sensitive to both treatments; no growth was detected the day after (a lethality of more than 4 log units).
AB - Vacuum-packaged poultry cooked sausages were pressure-treated at 500 MPa by combinations of time (5-45 min) and temperature (2-80°C) and later stored at 6-8°C for 12 we. Mesophile and psychrotrophe counts were determined 1 d, 3, 6, 9 and 12 we after treatment and compared with those of cooked sausages pasteurized at 80-85°C for 40 min. Both pressure and heat treatments offer great possibilities for preservation. Sausages pressurized at 65°C for 15 min showed mesophile numbers below 2 log cfu g-1 throughout the chill storage. Pressurization, unlike heat treatment, causes a reversible bacterial stress. Thus, injured cells recovered during storage and, at 6 and 12 we, after a temperature abuse (room temperature for approx. 24 h), counts increased up to 6.5-7.5 log units. Psychrotrophes were more sensitive to both treatments; no growth was detected the day after (a lethality of more than 4 log units).
U2 - https://doi.org/10.1046/j.1365-2672.1999.00611.x
DO - https://doi.org/10.1046/j.1365-2672.1999.00611.x
M3 - Article
VL - 29
SP - 233
EP - 237
JO - Letters in Applied Microbiology
JF - Letters in Applied Microbiology
SN - 0266-8254
ER -