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Growth of psychrotrophic foodborne pathogens in a solid surface model system under the influence of carbon dioxide and oxygen.

Author(s) : BENNIK M. H. J., SMID E. J., ROMBOUTS F. M., GORRIS L. G. M.

Type of article: Article

Summary

A model system was developed to study the effect of gas atmosphere composition on the growth of Aeromonas hydrophila, Yersinia enterocolitica, Listeria monocytogenes, and a cold tolerant str. of Bacillus cereus. In all instances the maximum specific growth rate decreased significantly with increasing CO2 concentration. A strong reduction in the maximum population density was noted only for B. cereus at the highest level of CO2. The results indicated that the model system may be a suitable means of estimating the growth of bacteria on minimally processed produce, packaged under modified atmospheres. Extrapolation of the results to modified atmosphere packaged fruits and vegetables using typical O2 concentration of 1-5% and CO2 concentration of 5-10%, suggested that growth of the above pathogens may occur at 8 deg C, thereby imposing a safety hazard for these products.

Details

  • Original title: Growth of psychrotrophic foodborne pathogens in a solid surface model system under the influence of carbon dioxide and oxygen.
  • Record ID : 1998-0904
  • Languages: English
  • Source: Food Microbiol. - vol. 12 - n. 6
  • Publication date: 1995

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