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Table 2 Autoaggregation of P. gingivalis wild-type strain and mutants

From: Distinct roles of long/short fimbriae and gingipains in homotypic biofilm development by Porphyromonas gingivalis

Strain Autoaggregation indexa)
(-dA/min)
ATCC33277
(wild type)
17.73 ± 1.67
KDP150
fimA)
0.54 ± 3.94**
MPG67
mfa1)
36.12 ± 2.40**
MPG4167
fimA Δmfa1)
33.87 ± 2.77**
KDP129
kgp)
35.62 ± 2.52**
KDP133
rgpA ΔrgpB)
15.04 ± 2.68
KDP136
rgpA ΔrgpB Δkgp)
0.29 ± 3.22**
  1. a) dA/min was automatically calculated by subtraction of At, the absorbance at time t min, from At+, at time (t + 1) min during incubation. The maximum value of – dA/min in a curve was used as the autoaggregation index. The data represent the mean ± SE of three separate experiments with each strain in duplicate.
  2. **p < 0.01 in comparison with the wild type using a Scheffe test.