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Table 4 Antibiofilm activity of alcoholic and aqueous green tea extracts against 20 Streptococcus mutans isolates recovered from dental plaque and saliva specimens (10 isolates each)

From: Biofilm formation by Streptococcus mutans and its inhibition by green tea extracts

Biofilm formation degree Isolate code MBIC (mg/ml) of green tea extracts
Aqueous extract Alcoholic extract
Strong ss 2 (CCASU-SM 25) 25 ± 0.026 6.25 ± 0.020
ss 5 25 ± 0.029 6.25 ± 0.035
ss 13 12.5 ± 0.153 6.25 ± 0.045
ss 14 50 ± 0.1 6.25 ± 0.050
ss 24 25 ± 0.173 12.5 ± 0.040
ss 30 50 ± 0.11 12.5 ± 0.055
ss 40 6.25 ± 0.029 3.125 ± 0.050
dp 1 25 ± 0.1 12.5 ± 0.032
dp 16 12.5 ± 0.098 6.25 ± 0.045
dp 25 25 ± 0.11 6.25 ± 0.088
dp 30 (CCASU-SM 26) 50 ± 0.091 12.5 ± 0.02
dp 35 6.25 ± 0.161 3.125 ± 0.25
dp 37 50 ± 0.11 12.5 ± 0.02
Moderate ss 21 12.5 ± 0.068 6.25 ± 0.09
dp 2 25 ± 0.05 12.5 ± 0.05
dp 6 25 ± 0.1 6.25 ± 0.03
dp 27 12.5 ± 0.195 12.5 ± 0.1
Weak ss 27 6.25 ± 0.147 6.25 ± 0.07
ss 28 6.25 ± 0.053 3.125 ± 0.04
dp 4 6.25 ± 0.06 3.125 ± 0.11
  1. *The activity was expressed as minimum biofilm inhibitory concentration (MBIC)