The use of microorganisms in the synthesis of nanoparticles emerges as an ecofriendly and
existing approach. In this study biosynthesis of silver nanoparticles using Streptococcus sp,
Proteus sp, Pseudomonas sp and its antimicrobial activity against (S.typhi, S.epidermidis,
K.pneumoniae,P.aeruginosa, P.vulgaris, E.coli) different pathogen has been reported. The zone
of inhibition seems in both gram positive and gram negative bacterial strains.