Anti-Listeria monocytogenes effect of bacteriocin-incorporated agar edible coatings applied on cheese. (October 2019)

• Record Type: Journal Article
• Authors: Guitián, M. Virginia; Ibarguren, Carolina; Soria, M. Cecilia; Hovanyecz, Paula; Banchio, Claudia; Audisio, M. Carina
• Is Part Of: International dairy journal. Volume 97(2019)
• Page Start: 92
• Page End: 98
• Publication Date: 2019-10
• Subjects: Dairying -- Periodicals; Industrie laitière -- Périodiques; Electronic journals; 338.1762142
• DOI: 10.1016/j.idairyj.2019.05.016
• Languages: English
• ISSNs: 0958-6946

Abstract

Abstract: Bacteriocins synthesised by lactic acid bacteria are natural alternatives to control Listeria monocytogenes, a foodborne pathogen. Additionally, antimicrobial biopolymer coatings have significant benefits in food packaging and preservation. The effect of anti- L. monocytogenes enterocins synthesised by Enterococcus avium DSMZ17511 was evaluated when supported on agar edible films and applied as antimicrobial coatings on different cheese matrices artificially contaminated with L. monocytogenes 01/155. A decrease of at least 1 log unit in viability of the pathogen was detected. The wetter matrix of soft cheese facilitated rapid diffusion of the antimicrobials, while the drier matrix of semi hard cheese produced a gradual release with prolonged inhibition of the pathogen. Also, DSMZ17511 antimicrobial peptides, only at very high concentrations, exhibited mild cytotoxicity against L929 and Caco-2 cell lines. Therefore, application of these enterocin agar coatings could be an effective, low cost, natural and safe alternative to control L. monocytogenes in cheeses.