Combined pressure-thermal inactivation kinetics of Bacillus amyloliquefaciens spores in egg patty mince

Journal of Food Protection
S RajanA E Yousef

Abstract

Bacillus amyloliquefaciens is a potential surrogate for Clostridium botulinum in validation studies involving bacterial spore inactivation by pressure-assisted thermal processing. Spores of B. amyloliquefaciens Fad 82 were inoculated into egg patty mince (approximately 1.4 x 10(8) spores per g), and the product was treated with combinations of pressure (0.1 to 700 MPa) and heat (95 to 121 degrees C) in a custom-made high-pressure kinetic tester. The values for the inactivation kinetic parameter (D), temperature coefficient (zT), and pressure coefficient (zP) were determined with a linear model. Inactivation parameters from the nonlinear Weibull model also were estimated. An increase in process pressure decreased the D-value at 95, 105, and 110 degrees C; however, at 121 degrees C the contribution of pressure to spore lethality was less pronounced. The zP-value increased from 170 MPa at 95 degrees C to 332 MPa at 121 degrees C, suggesting that B. amyloliquefaciens spores became less sensitive to pressure changes at higher temperatures. Similarly, the zT-value increased from 8.2 degrees C at 0.1 MPa to 26.8 degrees C at 700 MPa, indicating that at elevated pressures, the spores were less sensitive to changes in temperature. The n...Continue Reading

References

Aug 15, 1998·Critical Reviews in Food Science and Nutrition·M Peleg, M B Cole
Jan 28, 1999·Journal of Food Protection·D M MussaJ P Smith
Aug 30, 2001·Applied and Environmental Microbiology·K L MattickT J Humphrey
Apr 5, 2002·International Journal of Food Microbiology·Martinus A J S van Boekel
Apr 16, 2005·Journal of Food Protection·M HassaniR Pagán

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Citations

Nov 13, 2007·Journal of Food Science·Loc Thai NguyenV M Balasubramaniam
Apr 12, 2013·Journal of Food Protection·Hossein DaryaeiJ David Legan
Apr 23, 2014·Journal of the Science of Food and Agriculture·Juhee AhnV M Balasubramaniam
Mar 10, 2015·Annual Review of Food Science and Technology·V M Bala BalasubramaniamRockendra Gupta
Jan 7, 2010·Journal of Food Protection·UNKNOWN National Advisory Committee on Microbiological Criteria for Foods
Aug 15, 2017·Journal of Food Protection·Mengyi Hu, Joshua B Gurtler
Sep 21, 2017·Journal of Agricultural and Food Chemistry·Anna WestphalVolker Böhm
Oct 3, 2007·Journal of Agricultural and Food Chemistry·Anand SubramanianLuis Rodriguez-Saona
Dec 21, 2006·Journal of Agricultural and Food Chemistry·Anand SubramanianLuis Rodriguez-Saona

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