The results of MIC of ethanol extract of betel leaf against different test organisms are shown in Fig 3. From the experimental findings it was observed that the MIC values for ethanol extract against the test organisms ranged from 0.625 to 0.75 mg/ml. The MIC of the ethanol extract showed highest inhibition for E. coli (0.625mg/ml), V. cholerae (0.625mg/ml) and S. aureus (0.625mg/ml). The MIC of the ethanol extract showed lowest inhibition for E. coli 0157:H7 (0.75mg/ml) and S. dysenteriae (0.75mg/ml)