A review on growth/no growth Salmonella models

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• 作者：Elena Carrasco^a ; ^b ; ^{bt2cajie@uco.es} ; Susana del Rosal^a ; Juan Carlos Racero^b ; Rosa Marí ; a Garcí ; a-Gimeno^a
• 关键词：Salmonella ; Growth-no growth ; Predictive microbiology ; Modeling
• 刊名：Food Research International
• 出版年：2012
• 期刊代码：53_09639969
• 类别：abs
• 出版时间：June, 2012
• 卷：47
• 期：1
• 页码：90-99
• 文件大小：407 K

摘要

鈥淗urdle technology鈥?is a worldwide technique of food preservation based on the application of a combination of generally mild treatments which act as 鈥渙bstacles鈥?that microflora must overcome to start to grow. Then, bacteria invest their energy in trying to maintain their homeostatic equilibrium instead of multiplying. While the action mechanisms underlying these treatments are not fully understood, it is very useful to know their effect on bacteria cells as well as the extension of such effects. Growth/no growth models have been developed to offer a response to this need. A review on growth/no growth microbial modeling is presented in this paper, addressing the most important factors and approaches employed. Five growth/no growth models of Salmonella published in the period 2001-2011 are reviewed, and their boundary regions were represented (Temperature vs pH) at two water activity values (0.983 and 0.990) and two cut-off probabilities (0.1 and 0.5). With this illustration, a picture of the relative grade of conservatism of the five models is provided. Additionally, the most important predictive tools in food microbiology (or tertiary models), including a software for growth/no growth modeling (Microbial Responses Viewer), are commented. Finally, some caveats in growth/no growth Salmonella modeling are addressed for future research.