Antimicrobial Resistance of Listeria monocytogenes Isolates from Food and the Environment in France over a 10-Year Period

In order to assess antimicrobial resistance in Listeria monocytogenes, 202 food and environmental isolates from 1996 to 2006 were tested. Only four strains displayed acquired resistance. Resistance to erythromycin, tetracycline-minocycline, and trimethoprim was evidenced, and the genes erm(B), tet(M), and dfrD, already found in L. monocytogenes, were detected.