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Dr. Islam Ibrahim Ahmed Ibrahim Sabeq :: Publications:

Title:
The Growth Kinetics of Salmonella Enteritidis in Raw Ground Beef
Authors: Sabike, I.I., Fujikawa, H., and Edris, A.M.
Year: 2015
Keywords: Salmonella / Ground beef / Logistic model / Polynomial model / Growth kinetics.
Journal: Biocontrol Science
Volume: 20
Issue: 3
Pages: 185-192
Publisher: J-stage
Local/International: International
Paper Link:
Full paper Islam Ibrahim Ahmed Ibrahim Sabike_20_185.pdf
Supplementary materials Not Available
Abstract:

The growth kinetics of Salmonella Enteritidis in raw beef has been little studied so far. Thus, this study aimed to clarify the growth kinetics of the pathogen in ground beef using a growth model. When Salmonella cells inoculated at various initial doses into ground beef were incubated at a given temperature (24℃, the maximum population (Nmax) of the microbe at the stationary phase varied with the doses. This relationship was expressed with a polynomial equation for Nmax using the initial dose. The combination of the growth model and the polynomial equation successfully predicted Salmonella growth at a given initial dose. When Salmonella cells inoculated in ground beef were incubated at various constant temperatures, the growth curves of the pathogen and natural microflora (NM) were well described with the growth model. The rate constant of growth and the Nmax values for Salmonella and NM were then analyzed kinetically. From these results, growth curves of Salmonella and NM in ground beef stored at dynamic temperatures were successfully predicted. Competition between Salmonella and NM in ground beef was also found during the storage. This study could give usable information on the growth of Salmonella and NM in ground beef at various temperatures.

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