FIG. 4.

Southern blot of EcoRI-digested genomic DNAs from L. monocytogenes serotype 4b strains with probe 1-4. Lane M, λ molecular size markers, as described in the legend for Fig. 1. Lanes 1 and 7, RFLP pattern V of strains OLM 8 and OLM 151 (isolates from animal and human illness, respectively, of serotype 4a or 4c); lanes 2, 4, 5, and6, RFLP pattern II of ECI strains OLM10, OLM 65, OLM 97, and OLM 116, respectively; lane 3, RFLP pattern VI of strain OLM 59 (human clinical isolate, serotype 4a or 4c).