Sideritis syriaca
In comparison to the S. euboea extract, the extract of S. syriaca exhibited stronger inhibition against S. sobrinus ,E. faecalis , P. gingivalis , P. micra , S. aureus , and E. coli (Table 14). Mean MIC values ranged between 0.08 mg / ml (P. gingivalis , P. micra ) and 2.50 mg / ml (E. coli , E. faecalis ). S. mutans and C. albicans were not suppressed by the extract. Obligate anaerobes andS. oralis were eliminated more easily compared to S. aureus , S. mutans , and S. sobrinus , with a range of 0.08 mg / ml (P. micra ) to 10.00 mg / ml (S. mutans , S. sobrinus ).
As shown in Figure 3, S. mutans biofilm production was completely inhibited at 5.00 mg / ml of the S. syriaca extract (C1).