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Determination of the relative effects of temperature, pH and water activity in food systems: a meta-analysis study

Abdullah, W. Z. W., Mackey, B. M. and Karatzas, K.-A. G. (2017) Determination of the relative effects of temperature, pH and water activity in food systems: a meta-analysis study. Malaysian Applied Biology, 46 (3). pp. 67-70. ISSN 0126-8643

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Official URL: http://www.mabjournal.com/index.php?option=com_con...

Abstract/Summary

The aim of this study is to use ComBase to determine the relative effects of temperature, pH, and water activity in the inactivation rates of Salmonella enterica in a range of foods. This is performed to determine whether any of the above factors have a dominant effect on survival. The inactivation rates of Salmonella were obtained from original raw data in the ComBase browser and from complete ComBase data for Salmonella. A total of 972 data of different types of food systems and data of individual types of food from ComBase were analysed. Over the range of 0–90°C, the z values calculated for the food data is 14°C. At 0–46°C relevant to intermediate moisture foods (IMF), the z values for the food data was 22°C, indicating a moderate effect of temperature. The z value for inactivation at 47–90°C was 11°C, indicating that temperature has an important effect on survival. This study shows that the effect of temperature is clearer at high temperatures than in the low temperature region. It suggests that the inactivation of Salmonella in food systems is slightly dominated by temperature and that the pH and aw levels appear to be less influential.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Food and Nutritional Sciences > Food Microbial Sciences Research Group
ID Code:75975
Publisher:Malaysian Society of Applied Biology

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