Chemical Composition and Antimicrobial Activity of Two Sri Lankan Lichens, Parmotrema rampoddense, and Parmotrema tinctorum against Methicillin-Sensitive and Methicillin-Resistant Staphylococcus aureus

Figure 8

Inhibitory zones of crude extracts of P. tinctorum: (a) ethanol extract; (b) hexane extract. Crude extracts of P. rampoddense: (c) ethanol extract, (d) hexane extract, and (e) aqueous extract, against different strains of methycillin resistant Staphylococcus aureus. The lichen extracts that gave positive results for the disc diffusion assay for some MRSA strains are shown here. (+): positive control, vancomycin (30 μg/disc); (-): negative control, 10% DMSO; (c) crude extract; 10x: 10-fold dilution of crude extract; 100x: 100-fold dilution of the crude extract.

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