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

Figure 7

Inhibitory zones obtained for P. tinctorum and P. rampoddense tested against Gram-positive and Gram-negative bacteria. Top row shows the inhibitory zones of crude ethanol extracts of P. tinctorum against (a) S aureus, (b) E coli, (c) K pneumonia, and (d) P aeruginosa, and botom row shows the inhibitory zones of crude ethanol extracts of P.rampoddense against (e) S aureus, (f) E coli, (g) K pneumonia, and (h) P aeruginosa; (+): positive control, cefotaxime (30 μg/disk); (−): 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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