Leaves of all the three aforementioned orchids were shade dried, weighed and crushed in water and acetone in the (leaves to solvent) ratio of 2:1 (W/V). The extracts were then filtered and were investigated for their antimicrobial activity. Nutrient agar media with ampicillin and kanamycin suspended separately & nutrient agar for plating and LB broth (Hi-Media) for sub-culturing were used.