|
Sr. no.
|
Microorganisms
|
ZOI of 20 μl of AgNPs (mm) (y)
|
ZOI of 20 μl of 1 mM AgNO3 (mm) (x)
|
ZOI of 20 μl of H2O (mm)
|
Increase in the ZOI area (%)a
|
|---|
|
1
|
E. coli
|
12.66 ± 0.28
|
11.00 ± 0.0
|
0 ± 0
|
32.45
|
|
2
|
S. pneumoniae
|
14.33 ± 0.57
|
13.16 ± 0.28
|
0 ± 0
|
18.57
|
|
3
|
K. pneumonia
|
14.16 ± 0.28
|
13.0 ± 0.5
|
0 ± 0
|
18.64
|
|
4
|
P. vulgaris
|
14.00 ± 0.5
|
12.33 ± 0.28
|
0 ± 0
|
28.92
|
|
5
|
S. aureus
|
15.0 ± 0.0
|
13.16 ± 0.28
|
0 ± 0
|
29.91
|
|
6
|
P. aeruginosa
|
15.5 ± 0.5
|
13.5 ± 0.5
|
0 ± 0
|
31.82
|
|
7
|
B. cereus NCIM 5557
|
12.50 ± 0.5
|
11.16 ± 0.28
|
0 ± 0
|
25.45
|
|
8
|
B. megaterium NCIM 5334
|
15.33 ± 0.28
|
13.5 ± 0.5
|
0 ± 0
|
28.94
|
|
9
|
M. luteus NCIM 5262
|
15.5 ± 1.0
|
14.0 ± 0.5
|
0 ± 0
|
22.57
|
|
10
|
B. subtilis NCIM 2920
|
16.0 ± 1.0
|
14.0 ± 0.5
|
0 ± 0
|
30.61
|
|
11
|
C. albicans
|
12.0 ± 0.0
|
11.16 ± 0.28
|
0 ± 0
|
15.62
|
|
12
|
A. niger NCIM 1358
|
13.16 ± 0.28
|
11.0 ± 0.5
|
0 ± 0
|
43.12
|
|
13
|
M. racemosus NCIM 1334
|
13.0 ± 0.5
|
11.33 ± 0.28
|
0 ± 0
|
31.65
|
|
14
|
P. chrysogenum NCIM 1333
|
14.0 ± 1.0
|
10.0 ± 0.5
|
0 ± 0
|
96.00
|
|
15
|
R. stolonifer NCIM 1139
|
14.0 ± 1.0
|
12.5 ± 1.0
|
0 ± 0
|
25.44
|
- All experiments were performed in triplicate
-
aThe mean surface area of the growth inhibition zone (mm2) was calculated for AgNPs and AgNO3 from the mean diameter. The percent of increases of inhibition zone area for the AgNPs against different microorganism were calculated as (y2−x2)/x2 × 100, where x and y are the inhibition zone for 20 μl of AgNO3 and 20 μl of AgNPs respectively
