Adherence kinetics, resistance to benzalkonium chloride and microscopic analysis of mixed biofilms formed by Listeria monocytogenes and Pseudomonas putida

► The presence of P. putida quickened biofilm formation and increased BAC resistance of L. monocytogenes. ► The association between P. putida and L. monocytogenes varies depending of the involved strains. ► The correct evaluation of biofilm formation should consider by indirect variables such as resistance to disinfectants.