CENTRO DE REFERENCIA PARA LACTOBACILOS
Unidad Ejecutora - UE
Control of Listeria monocytogenes biofilms on industrial surfaces by the bacteriocin-producing Lactobacillus sakei CRL1862
CASTELLANO P; PEREZ IBARRECHE MARIANA; VIGNOLO GRACIELA; LECLERCQ A
FEMS MICROBIOLOGY LETTERS
WILEY-BLACKWELL PUBLISHING, INC
Lugar: Londres; Año: 2016 vol. 363
The effect of the bacteriocin-producing Lactobacillus sakei CRL1862 and its bacteriocin in the control of Listeria biofilm formation on industrial surfaces at 10 ºC, was investigated. A screening among different Listeria species was performed allowing selecting L. monocytogenes FBUNT for its use as biofilm producer on stainless steel (SS) and polytetrafluoroethylene (PTFE) surfaces. Three conditions were simulated to evaluate the ability of the bacteriocinogenic strain to displace, exclude and compete pathogen biofilm formation. L. sakei CRL1862 effectively inhibited biofilm formation by L. monocytogenes FBUNT through the three assayed mechanisms, pathogen inhibition being more efficient on PTFE than on SS surface. Moreover, co-culture of L. monocytogenes FBUNT with the bacteriocin-producer displayed the highest efficacy reducing the pathogen by 5.54 +/- 0.12 and 4.52 +/- 0.01 on PTFE and SS, respectively. Industrially, the pre-treatment with L. sakei CRL1862 or its bacteriocin (exclusion) constitutes the most realistic way to prevent pathogen biofilm settlement. The use of bacteriocins and/or the bacteriocin-producer strain represents a safe and environmentally friendly sanitation method to mitigate post-processing food contamination.