STUDY OF ENTERING OF LISTERIA MONOCYTOGENES INTO VIABLE BUT NON CULTURABLE FORM DURING HEAT TREATMENT PROCESS OF FOODS

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ZOLFAGHARI M.; REZAEI M.; FOROZANDEH MOGHADDAM M.; MOHEBBATI MOBAREZ A.; HOSSEINI H.

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Journal: IRANIAN JOURNAL OF FOOD SCIENCE AND TECHNOLOGY Year:2016 | Volume:13 | Issue:58 Page(s): 69-80

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Title

STUDY OF ENTERING OF LISTERIA MONOCYTOGENES INTO VIABLE BUT NON CULTURABLE FORM DURING HEAT TREATMENT PROCESS OF FOODS

Author(s)

Keywords

LISTERIA MONOCYTOGENESQ2

VBNCQ2

GENE EXPRESSIONQ2

FOOD SAFETYQ2

HIGH TEMPERATUREQ2

Abstract

LISTERIA MONOCYTOGENES is one of the most dangerous bacteria in food products which caused about 20 to 30% fatalities. One of the major foods which caused listeriosis is ready to eat (RTE). So, appropriate heating processing methods are need for elimination of L. monocytogenes. These bacteria has ability entering into viable but nonculturable (VBNC) form in unfavorable conditions. So this investigation was aimed to considering behavior of this pathogen at higher temperatures from recommended for elimination of these bacteria. For this purpose, bacteria in 5×106 counts in mid log phase were inoculated into two medium BHI Broth and fish Broth (FB) and they exposed to 85 oC for 10 minutes. Direct plate count on listeria choromogenic agar, BacLightÒ Live/Dead and GENE EXPRESSION of 16S rRNA, the housekeeping gene, were done before and after heat shock. The results show that these bacteria lose their culturability during high heat shock. The results of fluorescent dyes showed the viability of these bacteria after heat shock (p<0.01). The results of GENE EXPRESSION considering confirmed the results of fluorescence dyes and showed that 16S rRNA gene was expressed in nonculturable bacteria. According to these results, there is a big question on the D value on quality control for these bacteria in food processing processes, especially for RTE foods.

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APA: Copy

ZOLFAGHARI, M., REZAEI, M., FOROZANDEH MOGHADDAM, M., MOHEBBATI MOBAREZ, A., & HOSSEINI, H.. (2016). STUDY OF ENTERING OF LISTERIA MONOCYTOGENES INTO VIABLE BUT NON CULTURABLE FORM DURING HEAT TREATMENT PROCESS OF FOODS. IRANIAN JOURNAL OF FOOD SCIENCE AND TECHNOLOGY, 13(58), 69-80. SID. https://sid.ir/paper/72752/en

Vancouver: Copy

ZOLFAGHARI M., REZAEI M., FOROZANDEH MOGHADDAM M., MOHEBBATI MOBAREZ A., HOSSEINI H.. STUDY OF ENTERING OF LISTERIA MONOCYTOGENES INTO VIABLE BUT NON CULTURABLE FORM DURING HEAT TREATMENT PROCESS OF FOODS. IRANIAN JOURNAL OF FOOD SCIENCE AND TECHNOLOGY[Internet]. 2016;13(58):69-80. Available from: https://sid.ir/paper/72752/en

IEEE: Copy

M. ZOLFAGHARI, M. REZAEI, M. FOROZANDEH MOGHADDAM, A. MOHEBBATI MOBAREZ, and H. HOSSEINI, “STUDY OF ENTERING OF LISTERIA MONOCYTOGENES INTO VIABLE BUT NON CULTURABLE FORM DURING HEAT TREATMENT PROCESS OF FOODS,” IRANIAN JOURNAL OF FOOD SCIENCE AND TECHNOLOGY, vol. 13, no. 58, pp. 69–80, 2016, [Online]. Available: https://sid.ir/paper/72752/en

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