Nucleotide polymorphism within the seven housekeeping genes used for MLST.

N = number of STs or samples subjected for analysis. Sites = length of sequences after alignments. Net Sites = length of sequences subjected for analysis (the gaps or missing data are rejected from analysis). S = polymorphic sites. Hap = haplotypes. Hd = haplotypic diversity. π = nucleotide diversity. θ = average number of nucleotide differences per site. Ka/Ks = ratio of the number of non-synonymous substitutions per non-synonymous site (Ka) to the number of synonymous substitutions per synonymous site (Ks).Nucleotide polymorphism within the seven housekeeping genes used for MLST.