期刊
FOOD MICROBIOLOGY
卷 105, 期 -, 页码 -出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fm.2022.104029
关键词
X-ray irradiation; Listeria monocytogenes; Yersinia enterocolitica; Growth temperature; Inactivation; Mechanism
资金
- National Research Foundation of Korea (NRF) - Korea government (Ministry of Science and ICT) [NRF-2020R1C1C1006979]
This study evaluates the effect of different growth temperatures on the resistance of Listeria monocytogenes and Yersinia enterocolitica to low-energy X-ray irradiation and elucidates the mechanisms of resistance variability. The results indicate that the increased resistance to X-ray irradiation at low temperatures in the two pathogens is induced by different mechanisms.
This study aimed to evaluate the effect of different growth temperatures on the resistance of Listeria monocytogenes and Yersinia enterocolitica to low-energy X-ray irradiation and elucidate the mechanisms of resistance variability. The X-ray treatment at a dose of 1.0 kGy resulted in 4.00-, 4.87-, 3.98-, and 2.27-log reductions in cell counts of L. monocytogenes cultured at 37, 25, 15, and 4 degrees C, respectively. Cell counts of Y. enterocolitica, cultured at 37, 25, 15, and 4 degrees C, in phosphate-buffered saline decreased by 3.96, 4.98, 3.79, and 3.25 log CFU/mL, respectively, after X-ray irradiation at 0.4 kGy. In addition, the increased resistance to X-rays at low temperatures (4 degrees C) was induced by different mechanisms in the two pathogens. The results reveal that the key mechanisms for the change in resistance of L. monocytogenes and Y. enterocolitica to X-ray irradiation under different growth temperatures are efflux pump malfunction and DNA damage, respectively. These results suggest that the stress resistance status of L. monocytogenes and Y. enterocolitica cultured at different growth temperatures (37, 25, 15, and 4 degrees C) should be considered for application in low-dose X-ray irradiation in the food industry.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据