Abstract
The antimicrobial activities of two bioactive column chromatographic fractions (RF1 and RF2) from the lichen Ramalina farinacea (L.) were evaluated against 15 clinical isolates of Staphylococcus aureus. The susceptibility pattern of the isolates towards tetracycline (TCN) and ampicillin (AMP) was similarly -evaluated for comparison purposes. The results show that RF1 and RF2 with an MIC(90) ( minimum -inhibitory concentration against 90% of the isolates) of 535.5 and 317 microg/mL respectively, performed generally better than TCN and AMP with an MIC(90) of 976.5 and 357 microg/mL respectively.
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