Investigations of a Possible Chemical Effect of Salvadora persica Chewing Sticks

Figure 8

Inhibition of growth of A. actinomycetemcomitans (Aa), H. influenzae (Hi), and P. gingivalis (Pg). The individual bars represent the number of colony forming units (CFU) at various concentrations of benzaldehyde or chlorhexidine (Chlx) compared to the negative control (DMSO), set to 100%. In the above figure stands for –0.001 and stands for when number of CFU were compared between negative control and different concentrations of benzaldehyde or Chlx. Different letters on the bars represent significant difference () between the CFU of the three bacteria tested at a given concentration of benzaldehyde or Chlx independently, b indicate a significant difference compared to a, and c indicate a difference compared to both a and b.