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Predictive modeling on the growth of Staphylococcus aureus inoculated on Korean style cooked foods stored at various temperatures

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Abstract

This study was conducted to develop predictive models for the growth of Staphylococcus aureus on Korean style cooked foods (potato salad, stir-fried boiled fish paste, seasoned baby aster, and stir-fried anchovies) as a function of various storage temperatures (from 15 to 35 °C). The modified Gompertz equation was applied to fit the growth curves. Potato salad, stir-fried boiled fish paste, and seasoned baby aster showed the greatest specific growth rate by 1.219, 0.782, and 1.282 log10 CFU/h and the shortest lag time by 0.283, 0.407, and 0.374, respectively, when stored at 35 °C. No growth of S. aureus was observed in stir-fried anchovies due to its low water activity. Subsequently, these results were employed to establish the secondary models, which were further used for validation using accuracy factor and bias factor. Overall, accuracy factor of less than 1.461 and bias factor of less than 1.093 were observed depending on different storage temperatures and a sort of contaminated food samples. These results will be used to develop the manual representing the safe storage period of Korean foods contaminated with pathogenic bacteria.

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Acknowledgments

This research was supported by Chung-Ang University scholarship grant in 2015.

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Authors and Affiliations

  1. Department of Food Science and Technology, Chung-Ang University, 72-1 Nae-ri, Daedeok-myeon, Anseong-Si, Gyeonggi-do, 456-756, Republic of Korea

    Jae-Hyun Yoon, Young-Min Bae & Sun-Young Lee

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  1. Jae-Hyun Yoon
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  2. Young-Min Bae
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  3. Sun-Young Lee
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Correspondence to Sun-Young Lee.

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Yoon, JH., Bae, YM. & Lee, SY. Predictive modeling on the growth of Staphylococcus aureus inoculated on Korean style cooked foods stored at various temperatures. J Korean Soc Appl Biol Chem 58, 693–701 (2015). https://doi.org/10.1007/s13765-015-0093-z

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