Table 2.
Diameters of inhibition zones (mm) developed by AgNPs and bark extracts used for their synthesis against pathogenic bacteria and fungi.
| Microorganism | Nystatin | Gentamicin |
P. abies- AgNPs |
P. abies Extract |
P. nigra- AgNPs |
P. nigra Extract |
|---|---|---|---|---|---|---|
|
S. aureus ATCC 25293 |
ND | 23.00 ± 0.58 nc | 14.67 ± 0.58 nc,a | 13.00 ± 1.73 nc,a,b | 16.00 ± 2.64 nc,a,b,a | NA |
|
S. aureus ATCC 33591 (MRSA) |
ND | 15.67 ± 0.58 nc | 15.67 ± 1.15 nc,c | 10.67 ± 0.58 nc,a,a | 14.67 ± 0.58 nc,b,b,a | 10.67 ± 1.15 nc,a,a,c,b |
|
S. aureus ATCC 43300 (MRSA) |
ND | 7.67 ± 0.58 nc | 15.33 ± 0.58 nc,a | 7.67 ± 0.58 nc,c,a | 15 ± 1.0 nc,a,c,a | NA |
|
S. epidermidis ATCC 12228 |
ND | 29.67 ± 0.58 nc | 19.00 ± 1.73 nc,a | 14.67 ± 1.15 nc,a,a | 16 ± 1.0 nc,a,a,b | 12 ± 0.0 nc,a,a,b,a |
|
S. pyogenes ATCC 19615 |
ND | 18.33 ± 1.15 nc | 12.67 ± 0.58 nc,b | NA | 13 ± 1.0 nc,a,c,nc | NA |
|
E. coli ATCC 25922 |
ND | 20.67 ± 0.58 nc | 14 ± 1 nc,a | NA | 16.33 ± 2.08 nc,a,b,nc | NA |
|
P. aeruginosa ATCC 9027 |
ND | 23.33 ± 0.58 nc | 13 ± 1 nc,a | NA | 13.67 ± 0.58 nc,a,c,nc | NA |
|
C. albicans ATCC 90028 |
21.33 ± 0.58 | ND nc | 16.25 ± 1.73 a,nc | 7.91 ± 1.15 a,nc,a | 14.67 ± 1.52 a,nc,b,a | 9.33 ± 1.15 a,nc,a,b,a |
ND: not determined; NA: no activity; nc: not computed; a: p < 0.001; b: p < 0.05; c: no significance.