Tested Pathogenic Microbial strains Zone of Inhibition (ZOI)   Rumex dentatus extract (R. D.) 4 R.D. : 1 AgNO3 2 R.D. : 1 AgNO3 1 R.D. : 1 AgNO3 1 R.D. : 2AgNO3 1 R.D. : 4 AgNO3 Staphylococcus epidermis 8 - 11 9 13 16 Klebsiella pneumonia 7 10 9 8 - 11 Pseudomonas aurignos - 9 15 13 23 15 Staphylococcus aureus - 6 13 13 8 10 Shigells spp. - 14 10 10 18 18 E. coli 10 8 9 15 12 20 Staphylococcus biogensis - - - 14 15 18 Erwenia carotovora - - 9 18 2 10 Proteus vulgaris - 8 12 - 13 13 Fusarium solani - - - - - 7 Asperigillus flaviries - - - 10 9 12 Asperigillus ochraceous - - 14 13 11 10 Trichothecium - - - 14 15 22 Zone of inhibition, including the diameter of the filter disc (6.0 mm)

Table 1: Antimicrobial activity of the wild R. dentatus water extract and the synthesized silver nano particles using mixtures of different ratios of the plant extract and silver nitrate solution using disc diffusion assay.