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Characterization of Anti-Listeria monocytogenes Properties of two Bacteriocin-Producing Enterococcus mundtii Isolated from Fresh Fish and Seafood

  • Ramona Iseppi
  • Sara Stefani
  • Simona de Niederhausern
  • Moreno Bondi
  • Carla Sabia
  • Patrizia MessiEmail author
Article

Abstract

This study addressed the bacteriocin production in 116 lactic acid bacteria isolated from 143 fish and seafood samples. The screening for the production of antibacterial substances allowed for the selection of 16 LAB isolates endowed with inhibitory capability. Bacteriocins (bacLP17 and bacLP18) of two strains, Enterococcus mundtii LP17 and Enterococcus mundtii LP18, respectively, isolated from red mullet and sardine samples, determined large inhibition zones against all the Listeria species. Virulence traits and antibiotic resistances of all producers were verified, and no isolates presented dangerous characteristics, including the two best bacteriocin producers E. mundtii LP17 and E. mundtii LP18, which were subsequently investigated for their potential use in fish and seafood products biopreservation. For both strains, the highest level of bacteriocin production (1280 AU/ml) was recorded when cells were grown at 30 °C in MRS broth at pH ranging from 6.0 to 9.0, and high levels of adsorption of bacteriocins, bacLP17 and bacLP18, to the target cells Listeria monocytogenes were also observed. The results obtained in this study revealed that two strains of E. mundtii originating from seafood exhibited a strong inhibitory activity against L. monocytogenes and may be useful in controlling the growth of this pathogen in the same food products.

Notes

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Life SciencesUniversity of Modena and Reggio EmiliaModenaItaly

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