[Antibacterial activity determination of six kinds of natural herbs in yunnan on normal oral predominant].

Objective: To determine the antibacterial activity of six kinds of natural herbs in Yunnan on normal oral predominant bacteria in vitro.

Methods: Agar dilution method, the antimicrobial susceptibility testing of anaerobes which was recommended by National Committee for Clinical Laboratory Standard (NCCLs), was used to determine the antimicrobial susceptibility of herbs to 21 kinds of oral model strains and clinical isolates. The results were expressed by minimum inhibitory concentration (MIC).