Susceptibility of Listeria monocytogenes isolated from food in Italy to antibiotics

The susceptibility of 148 strains of Listeria monocytogenes isolated from food to antibiotics currently used in veterinary and human therapy was determined by standard agar dilution and disk diffusion methods. The antibiotics included amikacin, amoxicillin, cefazolin, chloramphenicol, erythromycin, flumequine, fosfomycin, gentamicin, kanamycin, lincomycin, oxytetracycline, rifampicin, spiramycin, streptomycin, tetracycline, tobramycin and vancomycin. Soussyʹs breakpoints and MIC50–MIC90 values were used to classify the strains into sensitive, moderately sensitive and resistant groups. ork is part of a wider surveillance program on listeriosis started in Italy in 1995.