Objective: To observe on antibacterial activity of Huangbai Acne Ointment (黄白痤疮膏, HBAO) decoction for Propionibacterium acne, Staphylococcus aureus and Staphylococcus epidermidis, and to provide experimental evidence for searching for a kind of compound Chinese medicinal preparation with low side effect and good therapeutic effect on ache. Methods: Minimum inhibitory concentration (MIC) of HBAO decoction to Propionibaeterium ache, Staphylococcus aureus and Staphylococcus epidermidis has been tested using serial dilution method. Resul...