4.6 Article

Technological Parameters, Anti-Listeria Activity, Biogenic Amines Formation and Degradation Ability of L. plantarum Strains Isolated from Sheep-Fermented Sausage

期刊

MICROORGANISMS
卷 9, 期 9, 页码 -

出版社

MDPI
DOI: 10.3390/microorganisms9091895

关键词

sheep meat; fermented sausage; L; plantarum; technological characterization; Anti-Listeria activity; biogenic amines; decarboxylase genes; multi-copper oxidase

资金

  1. Italian Government, Ministry of University, action PRIN 2004 [30]
  2. University of Sassari, Corso di Dottorato di Ricerca in Scienze Agrarie (XXIX Ciclo, AY 2013/2014)

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The study found that Lactiplantibacillus (L.) plantarum predominates in traditional sheep-fermented sausage, with most strains showing activity against Listeria monocytogenes and potential degradation ability of biogenic amines.
The aim of this work was to identify and characterize, from a technological and safety point of view, the lactic acid bacteria (LAB) isolated from traditional sheep-fermented sausage. First, LABs were identified then were screened for some technological parameters such as acidifying and growth ability, proteolytic and lipolytic activity and for antimicrobial activity. Finally, biogenic amine production and degradation abilities were also evaluated. This research reveals the predominance of Lactiplantibacillus (L.) plantarum on LAB community. Almost all L. plantarum strains were active against Listeria monocytogenes strains (inhibition zone diameters > 1 cm). None of the tested strains were positive in histidine (hdcA), lysine (ldc) and tyrosine (tyrdc) decarboxylase genes and only one (L. plantarum PT9-2) was positive to the agmatine deiminase (agdi) gene. Furthermore, given the positive results of the sufl (multi-copper oxidase) gene detection, all strains showed a potential degradation ability of biogenic amines.

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