Minimal inhibitory concentrations (MIC in µg/ml) of the isolates AA, BB, C, D and control.

Isolates were tested against skin pathogens like MRSA, Propionibacterium acnes and Staphylococcus epidermidis in a classical MIC dilution assay to define the lowest concentration for in vitro inhibition. Therefore, the compounds or fractions were diluted between 250 and 0.48 µg/ml and overlaid with bacterial solution (104 bacteria/ml). The table indicates that the isolated compound C shows the best activity against all tested bacteria.

采用经典的最低抑菌浓度（Minimum Inhibitory Concentration, MIC）稀释测定法，对受试分离株针对耐甲氧西林金黄色葡萄球菌（Methicillin-resistant Staphylococcus aureus, MRSA）、痤疮丙酸杆菌（Propionibacterium acnes）和表皮葡萄球菌（Staphylococcus epidermidis）等皮肤致病菌的抗菌活性进行测试，以明确其体外抑菌的最低浓度。据此，将受试化合物或馏分稀释至250至0.48 μg/ml的浓度区间，随后加入浓度为10⁴ 个细菌/ml的细菌悬液。结果表格显示，分离得到的化合物C对所有受试细菌均展现出最优的抑菌活性。