Fig. 1. The susceptibility of P. gingivalis for the extracts from shiitake mushroom. P. gingivalis was incubated with or without the extracts in the various concentrations. The growth of P. gingivalis was measured by a spectrophotometer at 660 nm wavelength. Asterix (*) indicates significant difference compared with control (P < 0.05).
O.D, optical density.
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