TABLE 4.

Relatedness of initial contact isolates to the index isolate in the household

ConditionNo. (%) isolatesaMean no. of days after index case (95% CI)b
Same serogroup and serotype127 (87)3.2 (2.6-3.9)
O1 serogroup, different serotype10 (7)3.2 (1.6-5.8)
Different serogroup9 (6)9.2 (3.5-14.9)
Identical at large-chromosome loci100 (68)2.6 (2.1-3.2)
Different at large-chromosome locus46 (32)5.8 (4.1-7.4)
Same 5-locus genotype67 (46)2.7 (2.1-3.4)
Nonidentical, same eBURST clonal complex44 (30)2.5 (1.5-3.5)
Unrelated by eBURST35 (24)6.6 (4.7-8.6)
  • a Total n = 146.

  • b CI, confidence interval.