1Botany Department, Isabella Thoburn Degree College, Lucknow.
2Chemistry Department, Career Convent Degree College, Lucknow.
3Narendra Deo Agricultural University, Kumarganj, Faizabad.
Ethanol extracts of 15 lichen species from Indian Himalayan flora were screened for antibacterial activity against 9 human pathogenic and 3 drug resistant bacterial strains through standard disc diffusion and broth dilution assays. 8 lichen species were found active and extracts of Cladonia, Cetrelia, Umbilicaria, Stereocaulon and Everniastrum exhibited a potent activity against the Gram-positive bacteria. Gram negative bacteria were found sensitive only to the extract of Everniastrum. Extract of Cetrelia braunsiana showed a potent activity towards the methicillin and vancomycin resistant strains of staphylococci.
Lichens, Extract, Antibacterial activity, Cetrelia braunsiana, Staphylococci, Drug - resistance
