Amino acid-converting behaviour of coagulase-negative staphylococci in a rich medium and in fermented sausages

Despoina Angeliki Stavropoulou, Hannelore De Maere, Alberto Berardo, Stefaan De Smet, Luc De Vuyst, Frederic Leroy

Onderzoeksoutput: Conference paper

Samenvatting

The ability of different coagulase-negative staphylococci (CNS) to convert amino acids into technologically important metabolites was investigated in a rich medium (brain heart infusion, BHI) and in dry fermented sausages. Firstly, 56 CNS strains from five different species were tested for volatile and biogenic amine production after 24 h and 48 h of culturing in BHI. With respect to volatile production, most CNS strains produced 3-methyl butanol, albeit with considerable differences between species and even between strains. In contrast, levels of 3-methyl butanal, which was already present as a background compound in the culture medium, mostly decreased. As to the production of biogenic amines in BHI, 2-phenylethylamine was the most abundant variant, although the average total concentration remained below 100 μM after 48 h of incubation. Next, four CNS strains were selected and applied in sausage fermentations. This led to strain-dependent differences in volatile profiles, with 3-methyl butanol, 3-methyl butanoic acid, and 2-methyl butanoic acid as the most pronounced end-products of amino acid conversions.
Originele taal-2English
TitelAmino acid-converting behaviour of coagulase-negative staphylococci in a rich medium and in fermented sausages
UitgeverijElsevier
Pagina's34-40
Aantal pagina's4
Volume212
StatusPublished - aug 2015
Evenement61th International Congress of Meat Science and Technology - Clermont-Ferrand, France
Duur: 23 aug 201528 aug 2015

Conference

Conference61th International Congress of Meat Science and Technology
LandFrance
StadClermont-Ferrand
Periode23/08/1528/08/15

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