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Growth behavior comparison of Listeria monocytogenes between Type strains and beef isolates in raw beef

This study was conducted to compare the growth parameters of Listeria monocytogenes between beef isolates and Type strains in raw beef. Beef was artificially inoculated with 3 Log CFU/g levels and growth was measured during storage at various temperatures (5–25 °C) using conventional plating methods...

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Published in:Food science and biotechnology 2018, 27(2), , pp.599-605
Main Authors: Lee, So-Yeon, Kwon, Ki-Hyun, Chai, Changhoon, Oh, Se-Wook
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Language:English
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description This study was conducted to compare the growth parameters of Listeria monocytogenes between beef isolates and Type strains in raw beef. Beef was artificially inoculated with 3 Log CFU/g levels and growth was measured during storage at various temperatures (5–25 °C) using conventional plating methods. The R 2 value for lag time ( λ ) and specific growth rate ( μ ) were determined using modified-Gompertz model, which were greater than 0.98 at all storage temperature except at 5 °C. B f , A f , and RMSE showed acceptable ranges, showed that the models are suitable for the modeling the growth of L. monocytogenes. At all temperatures, the λ of L. monocytogenes beef isolates was shorter than that of the L. monocytogenes Type strains, and the μ of beef isolates was higher than that of Type strains. These results showed that growth pattern prediction of beef inoculated with L . monocytogenes beef isolates gives more actual results than with Type strains.
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subjects Beef
Chemistry
Chemistry and Materials Science
Food irradiation
Food processing industry
Food Science
Growth rate
Lag time
Listeria
Listeria monocytogenes
Nutrition
Pathogens
prediction
raw meat
specific growth rate
Storage
Storage temperature
식품과학
title Growth behavior comparison of Listeria monocytogenes between Type strains and beef isolates in raw beef
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