Table 1.
Inhibitory activity of various concentrations of GTE on some clinically isolated cariogenic and periodontopathic bacteria by ADD test
|
S. mutans (n = 20) |
A. actinomycetemcomitans (n = 20) |
P. gingivalis (n = 20) |
P. intermedia (n = 20) |
|
|---|---|---|---|---|
| GTE concentration, mg/ml | ||||
| 1.56 | R | R | R | R |
| 3.12 | 7.5±2.76 | R | R | R |
| 6.25 | 12.3±1.62 | 7.35±3.3 | 7.25±3.22 | R |
| 12.5 | 22±1.52 | 12.5±1.8 | 11.65±1.53 | 11.85±1.53 |
| 25 | 26.9±1.51 | 17.35±1.72 | 16.8±1.6 | 16.85±1.53 |
| 50 | 36.3±1.08 | 27.25±1.65 | 26.65±1.56 | 27.05±1.6 |
| Vancomycin | 17a | 0 | 0 | 0 |
| Amikacin | 0 | 16a | 16a | 16a |
| PBS | 0 | 0 | 0 | 0 |
Values are mean diameters of inhibition zones in millimeters ± SD. PBS = Phosphate-buffered saline, pH = 7.4; R = resistant; n = number of isolates. Vancomycin (30 μg) and amikacin (30 μg) were used as reference antibacterial compounds.
a
Mean diameter of zone of inhibition of 3 experiments.