Summary of strains and their chromosome types at chromosomal rearrangement regions.

a:ST: Serotype. Serotypes identified by traditional method.b:Superscript number(s) within brackets refers to the numbers of primer pairs that worked for that strain at that rearrangement region (see Supplemental Figures S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11 and S12). Character (i.e. A or D) without a superscript number indicates all the primer pairs expected to work with that strain worked.c:No primer pair worked.