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Seafood quality analysis: molecular identification of dominant microbiota after ice storage on several general growth media Broekaert, K.; Heyndrickx, M.; Herman, L.; Devlieghere, F.; Vlaemynck, G. (2012). Seafood quality analysis: molecular identification of dominant microbiota after ice storage on several general growth media, in: Broekaert, K. Molecular identification of the dominant microbiota and their spoilage potential of Crangon crangon and Raja sp. pp. 29-47 In: Broekaert, K. (2012). Molecular identification of the dominant microbiota and their spoilage potential of Crangon crangon and Raja sp. PhD Thesis. Ghent University; Faculty of Bioscience Engineering: Gent. ISBN 978-90-5989-499-0. 157 pp. Is gerelateerd aan: Broekaert, K.; Heyndrickx, M.; Herman, L.; Devlieghere, F.; Vlaemynck, G. (2011). Seafood quality analysis: molecular identification of dominant microbiota after ice storage on several general growth media. Food Microbiol. 28(6): 1162-1169. https://dx.doi.org/10.1016/j.fm.2011.03.009, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 231610 [ download pdf ]

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Trefwoorden

Biota Microorganisms Quality Seafood products Storage > Fish storage Marien/Kust

Author keywords

Microbial fish biota; General growth media; Plate count agar; Long andHammer medium; Marine agar; Iron agar

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Auteurs		Top
Broekaert, K. Heyndrickx, M. Herman, L.	Devlieghere, F. Vlaemynck, G.

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Abstract

This study points out the limitations of several general growth media frequently used in seafood research by a systematic identification of the microorganisms on fish samples during ice storage unable to grow on those media. Aerobic psychrotrophic count (APC), replication on various general media and total cultivable microbial community denaturing gradient gel electrophoresis (DGGE) analysis revealed that many potential spoilage microorganisms were overlooked. Those microorganisms overlooked by using only one single growth medium were identified by partial 16S rRNA gene and gyrB gene sequencing. Members of the genera Shewanella, Vibrio, Aliivibrio, Photobacterium, Pseudoalteromonas and Psychrobacter, including Photobacterium phosphoreum, Shewanella baltica and Pseudomonas fluorescens are unable to grow on PCA. APC analysis also confirmed that on plate count agar (PCA) the enumeration of the microbiota was underestimated. Although Long and Hammer agar (LH) and marine agar (MA) obtained the best quantitative (APC analysis) and qualitative (replication and DGGE analyses) results for fish quality analysis, analysts have to keep in mind that some species were also unable to grow on those media, such as Pseudomonas fragi and Acinetobacter sp.

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