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KMID : 1007520190280030913
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Food Science and Biotechnology
2019 Volume.28 No. 3 p.913 ~ p.922
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Predictive model of Staphylococcus aureus growth on egg products
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Choi Won-Seok
Son Na-Ri
Cho Jun-Il
Joo In-Sun
Han Jeong-A
Kwak Hyo-Sun
Hong Jin-Hwan
Suh Soo-Hwan
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Abstract
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Egg products are widely consumed in Korea and continue to be associated with risks of Staphylococcus aureus-induced food poisoning. This prompted the development of predictive mathematical models to understand growth kinetics of S. aureus in egg products in order to improve the production of domestic food items. Egg products were inoculated with S. aureus and observe S. aureus growth. The growth kinetics of S. aureus was used to calculate lag-phase duration (LPD) and maximum specific growth rate (μmax) using Baranyi model as the primary growth model. The secondary models provided predicted values for the temperature changes and were created using the polynomial equation for LPD and a square root model for μmax. In addition, root mean square errors (RMSE) were analyzed to evaluate the suitability of the mathematical models. The developed models demonstrated 0.16?0.27 RMSE, suggesting that models properly represented the actual growth of S. aureus in egg products.
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KEYWORD
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Predictive model, Baranyi model, Staphylococcus aureus, Egg products, Validation
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