Monitoring of assertive Lactobacillus sakei and Lactobacillus curvatus strains using an industrial ring trial experiment

Aims In a previous study, we used a 5‐day fermenting sausage model to characterize assertiveness of Lactobacillus curvatus and Lactobacillus sakei starter strains towards employ autochthonous contaminants. In this work, we probed those findings and their transferability to real sausage fermentation...

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Bibliographic Details
Published in:Journal of applied microbiology 2019-02, Vol.126 (2), p.545-554
Main Authors: Janßen, D., Ehrmann, M.A., Vogel, R.F.
Format: Article
Language:English
Subjects:
assertiveness
Codominance
Contaminants
Drying
Fermentation
lactic acid bacteria
Lactobacillus curvatus
Lactobacillus sakei
MALDI‐TOF‐MS
Microbiota
Pollution monitoring
raw sausage fermentation
Ripening
Salami
Sausages
Starter cultures
Water activity
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Summary:Aims In a previous study, we used a 5‐day fermenting sausage model to characterize assertiveness of Lactobacillus curvatus and Lactobacillus sakei starter strains towards employ autochthonous contaminants. In this work, we probed those findings and their transferability to real sausage fermentation including the drying process in an industrial ring trial experiment. Methods and Results Raw fermented sausages (‘salami’) were produced with three L. curvatus and four L. sakei strains as starter cultures in cooperation with three manufacturers from Germany. We monitored pH, water activity and microbiota dynamics at strain level over a total fermentation and ripening time of 21 days by MALDI‐TOF‐MS identification of isolates. The principal behaviour of the strains in real sausage fermentations was the same as that one observed in the 5‐day model system delineating single strain assertiveness of a bacteriocin producer from co‐dominance of strains. Conclusions The water activity decrease, which is concomitant with the sausage ripening process has only limited impact on the assertiveness and survival of the starter strains. Significance and Impact of the Study Results of a 5‐day model can provide insight in the assertiveness of a specific starter strain in sausage fermentation.
ISSN:1364-5072
1365-2672
DOI:10.1111/jam.14144