Antimicrobial activity of AgNPs of Sterculia foetida leaf extract The Ag NPs of S. foetida leaves at 80 μl/well showed maximum antibacterial activity against E. Coli, (25.00 mm), followed by Bacillus subtilis (24.00mm) and minimum of 22.00mm activity against Staphylococcus aureus. Similarly, against fungi the maximum activity of 14.00mm was recorded against T rubrum and C albicans followed by 13.00 mm against M .gypseum and minimum of 10.00mm activity against T. tonsurans. The antimicrobial activity was directly proportional to the concentration of AgNPs. Two negative controls i.e., Plant aqueous extract and AgNo3 solution did not show any activity against any tested strains. Streptomycin sulphate and Ketoconazole used as standards against bacteria & fungi showed the inhibition zones of 35.00mm & 23.00mm, respectively.