Strain

Guava extract

Eugenol

Inhibition zone (mm)

MIC (µg/ml)

MIC (µg/ml)

Streptococcus mutans (ATCC 25175)

8.6 ± 0.57

250

250

Streptococcus mitis (ATCC 49456)

8.2 ± 0.28

250

500

Streptococcus oralis (ATCC 10557)

9.3 ± 0.76

250

500