Can I read Modelling the Effect of Oxygen Concentration on Bacterial Growth Rates on EtoBox?

Modelling the Effect of Oxygen Concentration on Bacterial Growth Rates by Olivier Couvert; Marie-Laure Divanac'h; Anne Lochardet; Dominique Thuault; Véronique Huchet is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Modelling the Effect of Oxygen Concentration on Bacterial Growth Rates about?

Predicting the microbial safety of food products stored in modified atmosphere packaging implies taking into account the effect of oxygen reduction on microbial growth. According to their respiratory-type, the micro-organisms are not impacted similarly by the oxygen concentration. The aim of this article was to quantify and model the oxygen effect on the growth rates of 5 bacterial species: Listeria monocytogenes and Bacillus weihenstephanensis (facultative anaerobic), Pseudomonas fluorescens (strict aerobic), Clostridium perfringens and Clostridium sporogenes (strict anaerobic). The results showed the oxygen concentration doesn't modify the behavior of both facultative anaerobic strains. The growth rate of P. fluorescens decreased with the oxygen concentration, but the effect is only noticeable when the oxygen concentration fell below 3% in the gaseous phase. Conversely, the oxygen acted as a growth inhibitor for both Clostridium species. But total inhibition is reached only for 3.26% and 6.61% respectively for C. sporogenes and C. perfringens. Two models have been fitted for both respiratory-types, the first is the Monod model considering oxygen as a substrate for growth, and the

Who reads Modelling the Effect of Oxygen Concentration on Bacterial Growth Rates?

Author

Olivier Couvert; Marie-Laure Divanac'h; Anne Lochardet; Dominique Thuault; Véronique Huchet

Publisher

Elsevier BV

Published

2018

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)