Objective To comparatively study the anti-bacteral effects of twelve Chinese medicinal formules in vivo. Methods The tube broth methods were used to investigate the anti-bacteral effects of twelve Chinese medicinal formules on β—hemolytic streptococcus, S. Pneumoniae, S. aureus, P. aeruginosa and E.coli. Results The bacteria-inhibiting effects of Supplemented Ephedra,Apricot Kernel,Gypsum and Licorice Dectoction (SEAGLD) was the most significant among the twelve formules. The minimal inhibition concentration (MIC) of this formula on the patho...