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Effect of environmental stresses on the sensitivity of Enterobacter sakazakii in powdered infant milk formula to gamma radiation |
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| Authors: | Osaili T Al-Nabulsi A Shaker R Ayyash M Olaimat A Abu Al-Hasan A Kadora K Holley R |
| Institution: | Department of Nutrition and Food Technology, Jordan University of Science and Technology, Irbid, Jordan; Department of Food Science, University of Manitoba, Winnipeg, MB, Canada |
| Abstract: | 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 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. |
| Keywords: | D-value Enterobacter sakazakii gamma radiation infant milk formula stresses |
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