Genetic variability by locus of the 133 isolates included in the study.

Both groups of neuA alleles found in BV and the 67 bp non-coding fragment of pilE (pilENC) are analyzed separately. BV and CV account for the two datasets under study. Standard deviations are given in parentheses. n: Number of sequences. m: Sequence length. h: Number of haplotypes. Hd: Haplotype diversity. π: Nucleotide diversity. S: number of polymorphic sites. k: Number of pairwise differences. θ: Expected heterozygosity per site from S. Syn: Number of synonymous changes. Non-Syn: Number of non-synonymous changes. ω: dN/dS ratio. n.a.: Not available.