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Table 1 Determination of the antimicrobial activity of the different solvent extracts and their synthesized colloidal silver nanoparticles of W. americana root

From: Antimicrobial efficacy of biosynthesized silver nanoparticles from different solvent extracts of Waltheria americana root

Conc.

50 mg/mL

100 mg/mL

200 mg/mL

400 mg/mL

Bacteria

PSP

SSP

KSP

SA

PSP

SSP

KSP

SA

PSP

SSP

KSP

SA

PSP

SSP

KSP

SA

WAREE

14 ± 1.00a

17 ± 0.00a

15 ± 0.66a

16 ± 0.64a

20 ± 0.35a

19 ± 0.90a

20 ± 0.71a

18 ± 0.60a

21 ± 0.10a

19 ± 0.50a

20 ± 0.70a

19 ± 0.32a

22 ± 0.00a

20 ± 0.30a

22 ± 0.10a

20 ± 0.70a

WARDEE

12 ± 0.75a

18 ± 0.66a

17 ± 0.66a

16 ± 1.50a

17 ± 0.50a

19 ± 1.00a

18 ± 0.50a

17 ± 0.00a

18 ± 0.20a

20 ± 0.30a

19 ± 0.10a

18 ± 0.50a

19 ± 0.15a

21 ± 1.10a

20 ± 1.20a

20 ± 1.57a

WARHE

16 ± 0.55a

15 ± 1.00a

16 ± 0.66a

16 ± .50a

17 ± 1.00a

18 ± 1.50a

17 ± 0.50a

18 ± 1.00a

18 ± 0.00a

19 ± 1.00a

18 ± 0.30a

19 ± 0.10a

18 ± 1.20a

19 ± 0.34a

18 ± 1.25a

19 ± 0.35a

WAREEP

19 ± 0.33a

20 ± 0.22a

20 ± 1.00a

20 ± 1.00a

20 ± 1.00a

21 ± 2.00a

20 ± 1.00a

21 ± 0.00a

19 ± 1.00a

21 ± 1.00a

20 ± 1.20a

21 ± 1.20a

20 ± 1.15a

22 ± 1.75a

21 ± 1.45a

22 ± 1.16a

WARDEEP

18 ± 1.25a

21 ± 1.00a

21 ± 1.66a

20 ± 0.50a

20 ± 0.00a

22 ± 1.50a

23 ± 5.00a

21 ± 0.50a

19 ± 1.30a

23 ± 0.00a

21 ± 1.00a

20 ± 1.50a

26 ± 0.10a

20 ± 0.14a

22 ± 1.18a

24 ± 1.45a

WARHEP

16 ± 1.00a

20 ± 0.75a

16 ± 0.20a

18 ± 0.00a

17 ± 1.00a

21 ± 0.65a

20 ± 0.00a

19 ± 0.00a

17 ± 0.20a

21 ± 0.00a

17 ± 1.00a

19 ± 0.60a

18 ± 0.15a

22 ± 1.25a

18 ± 1.50a

20 ± 0.35a

Control (Ciprof)

30 ± 1.33a

31 ± 0.66a

32 ± 2.00a

33 ± 1.00a

30 ± 2.00a

35 ± 1.00a

34 ± 2.00a

30 ± 0.00a

33 ± 0.00a

32 ± 1.00a

33 ± 1.00a

31 ± 1.50a

32 ± 2.00a

33 ± 1.40a

35 ± 0.15a

31 ± 1.45a

  1. Result is presented in mean ± SD
  2. Key: PSP Proteus spp., SSP Streptococcus spp., KSP Klebsiella spp., SA Staphylococcus aureus, WAREE Waltheria americana root ethanol extract, WARDEE Waltheria americana diethyl ether root extract, WARHE Waltheria americana root water–heat extract, WAREEP Waltheria americana root ethanol extract silver nanoparticles, WARDEEP Waltheria americana diethyl ether root extract silver nanoparticles, WARHEP Waltheria americana root water–heat extract silver nanoparticles, and Ciprof ciprofloxacin
  3. aStandard deviation of three composite readings. Microbial diameter of inhibition zone measured in millimeter