Growth of Escherichia coli and Salmonella enteritidis on Fresh-cut Apple as a Function of Temperature Based on Modeling Study

doi:10.11924/j.issn.1000-6850.casb14120101

Abstract

Abstract: The objective of this study is to utilize predictive model to investigate the growth of Escherichia coli and Salmonella on fresh-cut apple as a function of temperature. The primary model Baranyi model was used to estimate the parameters of the growth of the pathogens on the surface of fresh cut apple at different temperatures during storage time, the secondary model square root model was used to fit the relationship of temperature and the maximum growth rate. The results showed that: since no growth was observed for both pathogens at 4℃, the Baranyi model could not fit the growth of the microorganisms. At 10, 15 and 25℃, the models fitted well with the growth of the tested strains as the coefficients of determination were higher than 0.96, the root mean square errors were lower than 0.23 and the fitted curves all had the statistical significance (P＜0.01), the square root model fitted well with the relationships of temperature and the maximum growth rate of both pathogens, the coefficients of determination were higher than 0.99, the root mean square errors were lower than 0.0023 and the fitted curves both had the statistical significance (P＜0.05). In conclusion, the established models fitted well with the growth of E. coli and Salmonella on fresh cut apple and could provide practical guidance for the prevention and control of pathogens on fresh cut apple.

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