Table 2.

Proportions of B. fragilis isolates containing bft

SubjectProportion of B. fragilis isolates containing bft
0 mo1 moa3 moc6 mo9 mo12 moTotal
10/20/70/2b0/11
20/10/1
30/70/20/50/20/20/18
40/180/10/21/61/27
51/1b2/21/15/59/9
721/213/33/33/36/636/36
80/20/10/10/4
90/20/2
100/10/70/3b0/11
110/3b0/3
135/54/41/24/4b14/15
1417/176/64/45/57/739/39
152/22/2
  • a The 1-month collection was screened only for B. fragilis and therefore not used in other tables and figures in this report.

  • b Some of these B. fragilis isolates were present on the third-highest-dilution plate and therefore not included in the other analyses of this study.

  • c The B. fragilis isolates from the 3-month sample of subject 1 were not frozen and therefore were not available for bft typing.