Biofilms of <i>Listeria monocytogenes</i> Produced at 12 ° C either in Pure Culture or in Co‐Culture with <i>Pseudomonas aeruginosa</i> Showed Reduced Susceptibility to Sanitizers

Abstract

Since most food plants have cold wet growth niches in production and storage areas, susceptibility testing should be performed on biofilms produced at refrigeration temperatures. Moreover, the efficiency of the sanitizers used in food industries should be performed on mixed culture biofilms, since in field conditions these will predominate. The results presented here highlight the importance of the temperature used for biofilm formation, when susceptibility to disinfectants is being assessed, as biofilms produced at lower temperature were less susceptible to sanitizers.