环境压力对婴儿配方奶粉中阪崎肠杆菌对γ辐射敏感性的影响。
Effect of environmental stresses on the sensitivity of Enterobacter sakazakii in powdered infant milk formula to gamma radiation.
作者信息
Osaili T, Al-Nabulsi A, Shaker R, Ayyash M, Olaimat A, Abu Al-Hasan A, Kadora K, Holley R
机构信息
Department of Nutrition and Food Technology, Jordan University of Science and Technology, Irbid, Jordan.
出版信息
Lett Appl Microbiol. 2008 Aug;47(2):79-84. doi: 10.1111/j.1472-765X.2008.02388.x. Epub 2008 Jun 28.
AIM
To evaluate the effect of starvation, heat, cold, acid, alkaline, chlorine and ethanol stresses on the resistance of Enterobacter sakazakii in powdered infant milk formula (PIMF) towards gamma radiation.
METHODS AND RESULTS
Stressed cells of E. sakazakii ATCC 51329 and four other food isolate strains were mixed individually with PIMF, kept overnight at room temperature, and then exposed to gamma radiation up to 7.5 kGy. The D(10)-values were determined using linear regression and for the stressed E. sakazakii strains these values ranged from 0.82 to 1.95 kGy.
CONCLUSIONS
Environmental stresses did not significantly change the sensitivity of most E. sakazakii strains to ionizing radiation.
SIGNIFICANCE AND IMPACT OF THE STUDY
Data obtained established that most forms of environmental stress are unlikely to significantly enhance the resistance of E. sakazakii strains to lethal, low dose irradiation treatment.
目的
评估饥饿、热、冷、酸、碱、氯和乙醇应激对婴儿配方奶粉中阪崎肠杆菌抗γ辐射能力的影响。
方法与结果
将阪崎肠杆菌ATCC 51329及其他4株食品分离株的应激细胞分别与婴儿配方奶粉混合，室温下放置过夜，然后接受高达7.5千戈瑞的γ辐射。使用线性回归测定D(10)值，应激阪崎肠杆菌菌株的这些值范围为0.82至1.95千戈瑞。
结论
环境应激并未显著改变大多数阪崎肠杆菌菌株对电离辐射的敏感性。
研究的意义和影响
所获得的数据表明，大多数形式的环境应激不太可能显著增强阪崎肠杆菌菌株对致死性低剂量辐照处理的抗性。
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