Nucleotide sequence analysis of the eight MLST loci.

Locus position: coordinates in kb based on L. sakei 23K chromosome. S: number of polymorphic sites (non-synonymous sites are shown in brackets). π/site : Average pairwise nucleotide difference per site. D: Tajima's D statistical value based on the population of 232 strains (significant deviation from 0 and from standard neutral model is marked by an *, p<0.05).