Mathematical Modeling of Stress Adaptation Response in Listeria monocytogenes on Tilapia Skin Induced by Dynamic Low-Temperature Thermal Processing

doi:10.7506/spkx1002-6630-20201102-018

FOOD SCIENCE ›› 2021, Vol. 42 ›› Issue (19): 97-105.doi: 10.7506/spkx1002-6630-20201102-018

• Basic Research • Previous Articles

Mathematical Modeling of Stress Adaptation Response in Listeria monocytogenes on Tilapia Skin Induced by Dynamic Low-Temperature Thermal Processing

MA Huawei, GAN Hui, WANG Yuanyuan, HE Jinzhao, FENG Pengfei, LÜ Min, GUO Ailing

(1. College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China;2. Guangxi Key Laboratory of Aquaculture Genetics and Breeding, Guangxi Academy of Fishery Sciences, Nanning 530021, China; 3. Guangxi Aquatic and Animal Husbandry School, Nanning 530021, China; 4. Guangxi Little Scientist Company, Nanning 530000, China; 5. Guangxi Aquaculture Beeding Center, Nanning 530031, China)

Published:2021-11-12

Abstract

Abstract: In this study, the Garre model was applied to model stress adaptation response in Listeria monocytogenes inoculated on tilapia skin during dynamic low-temperature heat treatment. L. monocytogenes CECT 4032 inoculated in tryptic soy broth (TSB) was heated up to 50 ℃ with a heating rate of 1.2 ℃/min. It was found that the ratio of the theoretical D value to the actual D value (f), Z value (Z), time rate (a), heating rate (E) and percentage increment of D value (c) were 12.96 ± 0.79, (4.61 ± 0.03) ℃, (0.12 ± 0.01) min?1, (0.51 ± 0.01) ℃/min and 1.22 ± 0.03, respectively, and the model was also successfully used to predict seven other microbial inactivation patterns. Validation trials were carried out by inoculating this strain on tilapia skin, revealing that the Garre model fitted better to the experimental data than the Bigelow model. Our results demonstrate that dynamic low-temperature heat treatment can induce stress adaptation response in L. monocytogenes, which may provide a reference for constructing a security early warning system for the storage and processing of tilapia skin.

Key words: tilapia skin; Garre model; stress adaption; Listeria monocytogenes; food safety

CLC Number:

TS207.4

MA Huawei, GAN Hui, WANG Yuanyuan, HE Jinzhao, FENG Pengfei, LÜ Min, GUO Ailing. Mathematical Modeling of Stress Adaptation Response in Listeria monocytogenes on Tilapia Skin Induced by Dynamic Low-Temperature Thermal Processing[J]. FOOD SCIENCE, 2021, 42(19): 97-105.

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Mathematical Modeling of Stress Adaptation Response in Listeria monocytogenes on Tilapia Skin Induced by Dynamic Low-Temperature Thermal Processing

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