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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)