The antimicrobial experiments of five familiar Chinese herbal medicines were studied by using the plate diluting method. The five materials were Galla chinensis, Lonicera japonica, Isatis indigotica, Andrographis paniculata and Taraxacum mongolicum respectly. The minimal inhibitory concentrations(MIC)and the antimicrobial time were determined in this study. The results indicated that there were all better antimicrobial effects of five Chinese herbs on Bacillus subtilis. The effects of Galla Chinensis, Lonic...