To investigate the antimicrobial effect of Forsythia suspensa(Thunb.) Vahl.Methods:To draw the growth curve of S.aureus and E.coli by determining OD420,and to study the affect according to the change of the growth curve.Results:0.01 g/ml extract of Forsythia suspensa(Thunb.) Vahl.has obvious antimicrobial effect on S.aureus,and 0.10 g/ml extract of Forsythia suspensa(Thunb.) Vahl.has some antimicrobial effect on E.coli.Conclusion:The ethanol Extract of Forsythia suspensa(Thunb.)Vahl.has selective obvious an...