title: Silver As Antibacterial toward Listeria monocytogenes.
abstract: Listeria monocytogenes is a serious foodborne pathogen that can contaminate food during processing and can grow during food shelf-life. New types of safe and effective food contact materials embedding antimicrobial agents, like silver, can play an important role in the food industry. The present work aimed at evaluating the in vitro growth kinetics of different strains of L. monocytogenes in the presence of silver, both in its ionic and nano form. The antimicrobial effect was determined by assaying the number of culturable bacterial cells, which formed colonies after incubation in the presence of silver nanoparticles (AgNPs) or silver nitrate (AgNO3). Ionic release experiments were performed in parallel. A different reduction of bacterial viability between silver ionic and nano forms was observed, with a time delayed effect exerted by AgNPs. An association between antimicrobial activity and ions concentration was shown by both silver chemical forms, suggesting the major role of ions in the antimicrobial mode of action.
authors.affiliation: Department of Food Safety, Istituto Zooprofilattico Sperimentale delle VenezieLegnaro, Italy; Department of Animal Medicine, Production and Health, Università di PadovaPadova, Italy.
authors.forename: Simone
authors.initials: S
authors.lastname: Belluco
authors.affiliation: Department of Food Safety, Istituto Zooprofilattico Sperimentale delle Venezie Legnaro, Italy.
authors.forename: Carmen
authors.initials: C
authors.lastname: Losasso
authors.affiliation: Department of Food Safety, Istituto Zooprofilattico Sperimentale delle VenezieLegnaro, Italy; Department of Information Engineering, Università di PadovaPadova, Italy.
authors.forename: Ilaria
authors.initials: I
authors.lastname: Patuzzi
authors.affiliation: Department of Animal Medicine, Production and Health, Università di Padova Padova, Italy.
authors.forename: Laura
authors.initials: L
authors.lastname: Rigo
authors.affiliation: Department of Animal Medicine, Production and Health, Università di Padova Padova, Italy.
authors.forename: Daniele
authors.initials: D
authors.lastname: Conficoni
authors.affiliation: Department of Food Safety, Istituto Zooprofilattico Sperimentale delle Venezie Legnaro, Italy.
authors.forename: Federica
authors.initials: F
authors.lastname: Gallocchio
authors.affiliation: Department of Food Safety, Istituto Zooprofilattico Sperimentale delle Venezie Legnaro, Italy.
authors.forename: Veronica
authors.initials: V
authors.lastname: Cibin
authors.affiliation: Department of Animal Medicine, Production and Health, Università di Padova Padova, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Catellani
authors.affiliation: Department of Animal Medicine, Production and Health, Università di Padova Padova, Italy.
authors.forename: Severino
authors.initials: S
authors.lastname: Segato
authors.affiliation: Department of Food Safety, Istituto Zooprofilattico Sperimentale delle Venezie Legnaro, Italy.
authors.forename: Antonia
authors.initials: A
authors.lastname: Ricci
keywords: cross-contamination; food preservation; food safety; foodborne pathogens; nanoparticles