Figure 1.
Neighbor-joining cladogram of 34 L. innocua and 30 L. monocytogenes strains by the concatenated data set gyrB-dapE-hisJ-sigB-ribC-purM-betL-gap-tuf with L. welshimeri as outgroup species. Leaves are labeled with sequence type (ST) designations. The numbers I, II, IIIA, IIIB, IIIC, A, B, C and D, on the branches represent L. monocytogenes lineages I, II, IIIA, IIIB, and IIIC, and L. innocua subgroups A, B, C and D respectively. IIIA* represents the low-virulent L. monocytogenes sublineages IIIA (seovar 4a) strain [11].