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Effect of glucose, pH and lactic acid on Carnobacterium maltaromaticum, Brochothrix thermosphacta and Serratia liquefaciens within a commercial heat-shrunk vacuum-package film

Citation

Mohsina, K and Ratkowsky, DA and Bowman, JP and Powell, S and Kaur, M and Tamplin, ML, Effect of glucose, pH and lactic acid on Carnobacterium maltaromaticum, Brochothrix thermosphacta and Serratia liquefaciens within a commercial heat-shrunk vacuum-package film, Food Microbiology, 91 Article 103515. ISSN 0740-0020 (2020) [Refereed Article]

Copyright Statement

Copyright 2020 Elsevier Ltd.

DOI: doi:10.1016/j.fm.2020.103515

Abstract

Carnobacterium maltaromaticum, Brochothrix thermosphacta and Serratia liquefaciens are common spoilage organisms found within the microbiome of refrigerated vacuum-packaged (VP) beef. Extending and predicting VP beef shelf-life requires knowledge about how spoilage bacteria growth is influenced by environmental extrinsic and intrinsic factors. Multifactorial effects of pH, lactic acid (LA) and glucose on growth kinetics were quantified for C. maltaromaticum, B. thermosphacta and S. liquefaciens within a heat shrink-wrapped VP commercial film containing a simulated beef medium. LA, pH, and undissociated lactic acid (UDLA) significantly affected bacterial growth rate (p < 0.001), whereas 5.55 mM glucose produced a marginal effect. At 1.12 mM UDLA, growth rate and maximum population density decreased 20.9 and 3.5%, 56 and 7%, and 11 and 2% for C. maltaromaticum, B. thermosphacta, and S. liquefaciens, respectively.

Item Details

Item Type:Refereed Article
Keywords:beef spoilage organisms, growth kinetics, pH, lactic acid, undissociated lactic acid
Research Division:Biological Sciences
Research Group:Microbiology
Research Field:Microbial ecology
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Natural hazards
Objective Field:Natural hazards not elsewhere classified
UTAS Author:Mohsina, K (Ms Kaniz Mohsina)
UTAS Author:Ratkowsky, DA (Dr David Ratkowsky)
UTAS Author:Bowman, JP (Associate Professor John Bowman)
UTAS Author:Powell, S (Dr Shane Powell)
UTAS Author:Kaur, M (Dr Mandeep Kaur)
UTAS Author:Tamplin, ML (Professor Mark Tamplin)
ID Code:138945
Year Published:2020
Deposited By:TIA - Research Institute
Deposited On:2020-05-13
Last Modified:2020-06-25
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