Antimicrobial susceptibilities of Listeria monocytogenes strains isolated from food and food processing environment in Poland

► 471 L. monocytogenes strains isolated from food and processing plants were subjected to serotyping, lineages and antimicrobial susceptibility. ► Only two strains (0.42%) showed resistance. ► The resistance to tetracycline compounds was due to the presence of tet(M), which not integrated in the conjugative transposon Tn916-Tn1545 family. ► The resistance to hydrophilic fluoroquinolones was attributed to active efflux associated with overexpression of gene lde. ► The prevalence of resistant L. monocytogenes strains in Poland is low.