Effect of peracetic acid on biofilms formed by Listeria monocytogenes strains isolated from a Brazilian cheese processing plant

• Autor(a) principal: Lee, Sarah Hwa In
• Data de Publicação: 2017
• Outros Autores: Barancelli, Giovana Verginia, Corassin, Carlos Humberto, Rosim, Roice Eliana, Coppa, Carolina Fernanda Sengling Cebin, Oliveira, Carlos Augusto Fernandes de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Journal of Pharmaceutical Sciences
• Texto Completo: https://www.revistas.usp.br/bjps/article/view/140181
• topic: Peracetic acid (PAA)/ biofilm/effects; L. monocytogenes; Dairy plants/Brazil

This study aimed to investigate the effect of peracetic acid (PAA, 0.5%) on adherent cells of three strains of Listeria monocytogenes strains belonging to serotypes 4b and 1/2b that had been previously isolated from the environment of a Brazilian cheese plant. The assays were conducted using polystyrene microplates and stainless steel coupons and the adhered cells were treated with PAA for 60, 120 and 180 s. On stainless steel, biofilms were partially inactivated by PAA after 60 s and almost 100% of the cells were damaged within 180 s using epifluorescence microscopy with LIVE/DEAD® staining. On polystyrene microplates, PAA decreased (P