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.