TABLE 1.

Description of strains

Strain	Descriptiona
III 10111	L. monocytogenes, food isolate, CLIP 79252
III 10126	L. monocytogenes Scott A, serotype 4b, CIP 103575
IV 136	L. monocytogenes, blood culture isolate (CHLS)
IV 512	L. monocytogenes, industry isolate
IV 576	L. monocytogenes, meningitis isolate (CHLS)
IV 634	L. monocytogenes, serotype 4b, clinical isolate (CHLS)
IV 644	L. monocytogenes, food isolate, CLIP 79253
IV 646	L. monocytogenes, blood culture isolate (CHLS)
IV 656	L. monocytogenes, serotype 1/2a, clinical isolate

^aCLIP, Listeria Collection of the Pasteur Institute; CIP, Institut Pasteur Collection; CHLS, Lyon-Sud Hospital.