Article (Scientific journals)
Microbial Ecology of French Dry Fermented Sausages and Mycotoxin Risk Evaluation During Storage
Coton, Monika; Deniel, Franck; Mounier, Jérôme et al.
2021In Frontiers in Microbiology, 12
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Keywords :
fermented sausages; microbial ecology; metabarcoding; fungi; mycotoxins
Abstract :
[en] Dry fermented sausages are produced worldwide by well-controlled fermentationprocesses involving complex microbiota including many bacterial and fungal species with key technological roles. However, to date, fungal diversity on sausage casings during storage has not been fully described. In this context, we studied the microbial communities from dry fermented sausages naturally colonized or voluntarily surface inoculated with molds during storage using both culture-dependent and metabarcoding methods. Staphylococci and lactic acid bacteria largely dominated in samples, although some halotolerant genera (e.g., Halomonas, Tetragenococcus, and Celerinatantimonas spp.) were also frequently observed. Fungal populations varied from 7.2 to 9.8 log TFU/cm2 sausage casing during storage, suggesting relatively low count variability among products. Fungal diversity identified on voluntarily inoculated casings was lower (dominated by Penicillium nalgiovense and Debaryomyces hansenii) than naturally environment-inoculated fermented sausages (colonized by P. nalgiovense, Penicillium nordicum, and other Penicillium spp. and sporadically by Scopulariopsis sp., D. hansenii, and Candida zeylanoïdes). P. nalgiovense and D. hansenii were systematically identified, highlighting their key technological role. The mycotoxin risk was then evaluated, and in situ mycotoxin production of selected mold isolates was determined during pilot-scale sausage productions. Among the identified fungal species, P. nalgiovense was confirmed not to produce mycotoxins. However, some P. nordicum, Penicillium chrysogenum, Penicillium bialowienzense, Penicillium brevicompactum, and Penicillium citreonigrum isolates produced one or more mycotoxins in vitro. P. nordicum also produced ochratoxin A during pilotscale sausage productions using “worst-case” conditions in the absence of biotic competition. These data provide new knowledge on fermented sausage microbiota and the potential mycotoxin risk during storage.
Disciplines :
Food science
Author, co-author :
Coton, Monika
Deniel, Franck
Mounier, Jérôme
Joubrel, Rozenn
Robieu, Emeline
Pawtowski, Audrey
Jeuge, Sabine
Taminiau, Bernard  ;  Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Microbiologie des denrées alimentaires
Daube, Georges  ;  Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Microbiologie des denrées alimentaires
Coton, Emmanuel
Frémaux, Bastien
Language :
English
Title :
Microbial Ecology of French Dry Fermented Sausages and Mycotoxin Risk Evaluation During Storage
Publication date :
November 2021
Journal title :
Frontiers in Microbiology
eISSN :
1664-302X
Publisher :
Frontiers, Lausanne, Switzerland
Volume :
12
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 09 November 2021

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