Objective To study the antibacterial effect and mechanism of Resveratrol(RES)on Staphylococcus aureus stand-ard strains (ATCC 25923).Methods Using the microdilution protocol,to obtain minimal inhibitory concentrations(MIC)of RES on Staphylococcusaureus standard strains.Transmission electron microscope (TEM)and scanning electron microscope (SEM)were tested to obtain the effect of Staphylococcusaureus on Ultrastructure.Results The MIC of RES to Staphylo-coccusaureus standard strains ATCC 25923 were 0.256 mg/ml.Compared with control group,transmission electron and scanning electron microscope observation showed that after the act of RES on S.au standard strains,the cell morphology of S.au standard strains changed serious deformation,cells in all shapes and size,cell boundary roughness,cell wall defected and ruptured,and osteoporosis of edgeo,looseness of its structure,the nuclear membrane rupture,local showed vacuolar characteristics.Cell ultrastructure was obvious damaged and inhibition.Conclusion Rseveratrol had obvious inhibition and destruction to the standard strains of staphylococcus aureus,and the inhibition mechanism may be related to the destruction of cell membrane permeability.%目的研究白藜芦醇（resveratrol，RES）对金黄色葡萄球菌标准株ATCC 25923（简称金葡菌标准株）抑菌作用。方法采用微量肉汤稀释法，检测金葡菌标准株最低抑菌浓度（minimal inhibitory concentrations，MIC）；通过透射和扫描电子显微镜观察白藜芦醇对金葡菌标准株超微形态的影响。结果白藜芦醇对金葡菌标准株的 MIC为0.256 mg／ml。白藜芦醇对金葡菌标准株作用后，与对照组相比，电镜下可见金葡菌标准株菌体细胞形态变形严重，菌体大小不一，菌体边界粗糙不圆润，细胞壁缺损并有破裂，边缘疏松不光滑，菌体内结构松散，核膜断裂，局部呈现空泡化特征，菌体细胞形态超微结构有明显破坏和抑制作用。结论白藜芦醇对金葡菌标准株有明显抑制和破坏作用，抑制机制可能和破坏细胞膜通透性有关。
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