Figure 4.

Neighbor-Joining tree of an 420 nt sequence that includes the 5' end fragment of inlA (194 nt) and the upstream region (226 nt). Clades representing lineages I, II, III, and IV are indicated. inlA sequences for L. monocytogenes lineage II isolates are color-coded; isolates bearing the A₆ allele are shown in green; isolates bearing the A₇ allele are shown in red; and isolates bearing the A₂GA₄ allele are shown in blue. Lineage I, III (F2695) and IV (F2086 and F2208) isolates are shown in black and they all bear the A₂GA₄ allele. The tree is unrooted. Bootstrap values are shown on top of their respective selected branches.