Table 2.

Number of P. gingivalis and total bacterial cells detected in plaque samples

GroupNo. of cells% P. gingivalisP. gingivalis strain(s) presentc
P. gingivalisa Total bacteriab
Periodontal health7.30 (0.7) × 1010 7.5 (3.2) × 1013 0.10hHG1691
1.95 (1.1) × 108 1.71 (1.1) × 1013 0.00hW83
7.20 (2.5) × 107 2.20 (0.6) × 1014 0.00hHG1691
5.90 (5.2) × 109 4.64 (0.5) × 1012 0.13hA7A1
6.25 (4.9) × 106 3.40 (1.3) × 1012 0.00hA7A1
4.47 (2.6) × 108 4.77 (3.9) × 1014 0.00h23A4
1.75 (0.7) × 107 3.00 (2.0) × 1010 0.06hA7A1
2.80 (0.0) × 109 1.06 (0.2) × 1012 0.26hHG1691
5.45 (0.7) × 109 3.37 (1.6) × 1012 0.16h381
5.21 (1.0) × 108 2.77 (1.8) × 1011 0.19h23A4, hA7A1
6.45 (2.5) × 108 2.30 (0.4) × 1012 0.03h381
Periodontitis1.50 (0.5) × 106 2.10 (0.7) × 107 7.10hW83
3.45 (0.9) × 109 4.00 (3.1) × 1013 0.00h381, hHG1691, hW83
8.00 (0.6) × 1010 5.90 (3.1) × 1012 1.40hHG1691
2.35 (1.8) × 1011 2.14 (0.9) × 1015 0.01hA50
3.45 (1.2) × 1010 1.99 (1.4) × 1014 0.02hHG1691
1.19 (0.4) × 1010 1.60 (0.7) × 1012 0.74h49417
1.24 (0.4) × 1011 1.96 (0.9) × 1012 6.32hW83
  • a Mean number of cells determined from 2 or 3 serial dilutions found to be in the linear range of the assay (standard deviation).

  • b Mean determined from 3 to 4 serial dilutions found to be in the linear range of the assay (standard deviation).

  • c Data from Griffen et al. (5).