FOOD SCIENCE ›› 2008, Vol. 29 ›› Issue (12): 115-119.

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Construction of Growth Prediction Model of Escherichia coli in Longissimus Dorsi Muscle

 JIANG  Ying-Jie, ZOU  Xiao-Kui, PENG  Zeng-Qi   

  1. 1.College of Food Science and Technology,Nanjing Agricultural University,Nanjing 210095,China;2.Jiangsu Food Science College,Huaian 223003,China
  • Online:2008-12-15 Published:2011-12-08

Abstract: The aseptic longissimus dorsi muscle was inoculated with Escherichia coli,and then was tray-packaged at 4,7,10,13 and16 ℃ for storage. The status of growth at different temperatures was fitted to linear model with the Statistica program. The results showed that growth of Escherichia coli in pork could be well described by Gompertz model in the range of temperature 7 to 16 ℃. The correlation regression of Belehradek model finely describes the influence of temperature on growth. The validation of the built model was carried out by comparing actual with predicted growth curves of Escherichia coli in pork at temperatures 8℃ and 12 ℃,respectively. Bias and accuracy factors were used as comparative indices which were 0.943,0.960 and 1.063,1.094 respectively. It was suggested the built model is effective.

Key words: Escherichia coli, pork, predictive model, growth kinetics