Table 2.

Distribution pattern of genetic elements among GBS

Genetic element(s) presentaNo. of isolates of serotype:
IaIbIIIIIIVVNTcET1dET12dIIIe
GBSi1 (IS861NDb)3010
IS1548 (IS861ND)030
None5303121
IS861 1500000
GBSi1, IS861 0037011
GBSi10000010
IS1548, IS861 00314000
  • a Data for IS1548 are from reference 21.

  • b ND, presence of IS861 not determined.

  • c NT, nontypeable strains.

  • d Isolates from high-virulence (ET1) and low-virulence (ET12) subpopulations of serotype III isolates (46).

  • e Additional serotype III isolates.