Open AccessInhibition of Listeria monocytogenes by bacteriocin-producing Bacillus velezensis isolated from silage
Author(s) -
Laura Bonato Alves Oliveira,
Yasmin Neves Vieira Sabino,
Marlon do Valle Barroso,
Ranaíla Kely Ferreira,
Junior Fernandes Lima,
Pedro Braga Arcuri,
Jailton da Costa Carneiro,
Ricardo José de Mendonça,
João Batista Ribeiro,
Alessandra Barbosa Ferreira-Machado,
Aline Dias Paiva
Publication year - 2021
Publication title -
research, society and development
Language(s) - English
Resource type - Journals
ISSN - 2525-3409
DOI - 10.33448/rsd-v10i9.17783
Subject(s) - bacteriocin , listeria monocytogenes , listeria , antimicrobial , proteinase k , bacteria , food science , microbiology and biotechnology , bacillus (shape) , silage , antimicrobial peptides , biology , chemistry , biochemistry , enzyme , genetics
The aim of this study was to investigate the production of anti-Listeria bacteriocins by naturally occurring bacteria on silage and to characterize the most promising bacteriocin. The production of bacteriocins was evaluated by the spot-on-lawn method. The presence of interfering factors and the sensitivity to proteinase K were analyzed. The spectrum of activity was determined and the most promising bacteriocin-producing isolate was identified, being selected for the subsequent experiments. The antimicrobial peptide was extracted, analyzed regarding temperature and pH sensitivities, and purified. Of the 37 isolates evaluated, seven showed anti-Listeria activity. The presence of bacteriophages and production of acidic compounds were not detected. The selected antimicrobial compound was sensitive to proteinase K and the producing-bacterium was identified as Bacillus velezensis. The crude extract maintained the antimicrobial activity in different temperatures and pH conditions. In conclusion, the bacteriocin produced by Bacillus velezensis showed strong activity against Listeria monocytogenes, and great stability to elevated temperature and adverse pH, desirable features for future biotechnological applications.