Skip to main content

Table 3 Summary of antibacterial activity of biosynthesized silver nanoparticles by Padina sp. against five pathogenic bacteria including gram-positive Staphylococcus aureus and Bacillus subtilis and gram-negative Pseudomonas aeruginosa, Escherichia coli, and Salmonella typhi with positive and negative control

From: Synthesis of silver nanoparticles using marine macroalgae Padina sp. and its antibacterial activity towards pathogenic bacteria

Concentration, mg/ml

Gram-positive organism

Gram-negative organism

Staphylococcus aureus

Bacillus subtilis

Pseudomonas aeruginosa

Escherichia coli

Salmonella typhi

0.25

10.50 ± 0.50

7.00 ± 0.50

8.33 ± 0.29

7.50 ± 0.50

6.50 ± 0.50

0.50

11.17 ± 0.29

8.17 ± 0.29

10.00 ± 0.50

9.17 ± 0.29

8.00 ± 0.50

0.75

12.50 ± 0.50

10.67 ± 0.58

12.00 ± 0.50

11.17 ± 0.29

10.00 ± 0.50

1.00

15.17 ± 0.58

12.67 ± 0.76

13.33 ± 0.76

12.67 ± 0.58

11.50 ± 0.50

Standard (ampicillin)

12.67 ± 0.29

25.33 ± 0.76

21.33 ± 0.76

20.50 ± 0.87

23.50 ± 0.50

0.01 M AgNO3

7.67 ± 0.58

6.83 ± 0.29

7.33 ± 0.29

8.17 ± 0.58

7.50 ± 0.50

Negative control

0.00

0.00

0.00

0.00

0.00