Studies on the Biologically Active Constituents of Lichens

Abstract

In the antimicrobial activity test majority of the thirteen lichen extracts (named h1, h2, h3, h4, h5, h6, h7, h8, h9, h10, h11, h12 and h13) offered antibacterial (against S. aureus, B. megaterium, 8. subtilis, B. cereus, S.-/J- hemolytic, S. lutea, S. typhi, S. dysenteries, S. Shiga, S. sonnies, S. boydii and E Coll), as well as antifungal (against A flavus, A. fumigatus, C. albicans, Mucor sp. and F. vasinfectum) activity; while against E. coli no efficacy was traced with the same dose maintained for the bacterial isolates. The dose was set for the antibacterial activity test as 200 µg/disc for all the extracts and the standard Ciprofloxacin was used 1 0µg/disc for comparison…………………………