Growth and spoilage metabolites production of a mesophilic Aeromonas salmonicida strain in Atlantic salmon (Salmo salar L.) during cold storage in modified atmosphere

Aims The aim of the study was to quantify the growth kinetic parameters and spoilage‐associated metabolites of an inoculated strain of Aeromonas salmonicida in pre‐rigor filleted Atlantic salmon (Salmo salar L.) stored in vacuum (VP) or modified atmosphere (MAP 60/40% CO2/N2) at 4 and 8°C. Methods a...

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Bibliographic Details
Published in:Journal of applied microbiology 2020-10, Vol.129 (4), p.935-946
Main Authors: Jakobsen, A.N., Shumilina, E., Lied, H., Hoel, S.
Format: Article
Language:English
Subjects:
Aeromonas
Aeromonas salmonicida
Aeromonas salmonicida - growth & development
Aeromonas salmonicida - isolation & purification
Aeromonas salmonicida - metabolism
Animals
Atmosphere
Atmosphere - analysis
Carbon dioxide
Cold storage
Cryopreservation
Food Microbiology
Food Packaging - methods
growth kinetics
Growth rate
Inoculation
Metabolites
Methylamines - metabolism
modified atmosphere packaging (MAP)
NMR
NMR spectroscopy
Nuclear magnetic resonance
nuclear magnetic resonance (NMR)
Packaging
Population density
Refrigeration
Salmo salar
Salmo salar - microbiology
Salmon
Seafood - microbiology
Spectroscopy
Spoilage
spoilage metabolites
Trimethylamine
trimethylamine (TMA)
Vacuum
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Summary:Aims The aim of the study was to quantify the growth kinetic parameters and spoilage‐associated metabolites of an inoculated strain of Aeromonas salmonicida in pre‐rigor filleted Atlantic salmon (Salmo salar L.) stored in vacuum (VP) or modified atmosphere (MAP 60/40% CO2/N2) at 4 and 8°C. Methods and Results The maximum growth rate of A. salmonicida in VP salmon stored at 4°C was 0·56 ± 0·04 day−1 with no detectable lag‐phase and the concentration of Aeromonas reached 8·33 log CFU per g after 10 days. The growth rates and maximum population density of Aeromonas in MAP salmon were lower but the applied atmosphere did not inhibit the growth. A selection of metabolites associated with fish spoilage were quantified using 1H nuclear magnetic resonance (NMR) spectroscopy. The concentration of trimethylamine (TMA) was significantly affected by storage time and temperature, packaging atmosphere and inoculation with A. salmonicida (General Linear Model (GLM), P 
ISSN:1364-5072
1365-2672
DOI:10.1111/jam.14680