In Vitro Antibacterial Activity of Selected Medicinal Plants in the Traditional Treatment of Skin and Wound Infections in Eastern Ethiopia
Table 2
Mean zone of inhibition (mm) of different bacteria at various concentrations of the test extracts of the experimental plants.
Plants
Concentration
Bacteria
S. aureus
P. aeruginosa
E. coli
K. pneumoniae
[mg/ml]
Cli
Sta
Cli
Sta
Cli
Sta
Cli
Sta
C. quadrangularis
195
10.3±1.8
10.7±0.7
10.0±0.6
10.7±0.3
- - -
- - -
7.3±0.3
8.7±0.9
390
14.7±0.9
15.0±1.2
12.0±0.6
14.3±0.7
7.3±0.3
7.3±0.3
9.3±1.2
11.7±0.9
780
18.3±1.5
18.3±0.9
15.7±0.7
17.7±1.2
9.3±0.3
9.7±0.7
13.3±1.5
16.0±1.2
C. benghalensis
195
9.3±1.5
13.7±0.9
- - -
8.0±0.6
- - -
- - -
- - -
- - -
390
13.0±1.2
17.0±0.6
7.3±0.3
11.0±0.6
- - -
- - -
- - -
- - -
780
15.7±1.8
20.0±1.5
10.7±0.3
14.7±0.7
- - -
- - -
- - -
- - -
E. heterophylla
195
13.3±0.3
14.0±0.0
8.0±0.6
10.3±0.9
8.3±0.7
10.7±0.3
8.7±0.3
13.0±0.0
390
14.7±0.9
16.7±0.9
11.7±0.9
13.0±0.6
11.0±0.6
13.3±1.2
12.0±0.6
14.7±0.9
780
18.7±1.2
20.3±0.0
14.3±1.5
15.3±0.9
14.0±0.0
16.0±1.7
15.7±0.3
18.0±0.0
E. prostrata
195
14.3±0.3
15.7±0.3
9.7±0.7
11.3±0.7
- - -
7.3±0.6
8.0±0.6
11.3±0.9
390
17.7±0.3
19.0±0.6
13.0±0.6
14.0±0.6
9.0±0.0
10.3±1.5
10.7±0.9
14.7±0.9
780
21.0±0.6
22.3±0.9
15.0±2.3
17.0±0.9
10.3±0.3
12.7±0.6
14.0±0.6
16.3±2.0
Gentamicin
0.025
26.0±0.6
28.7±0.6
23.3±0.7
26.3±0.3
21.7±0.6
24.3±0.9
22.7±0.9
25.3±0.3
M. schimperiana
195
- - -
7.3±0.3
- - -
- - -
- - -
- - -
- - -
- - -
390
8.0±0.6
9.0±1.2
- - -
7.3±0.3
- - -
- - -
- - -
7.3±0.3
780
11.0±0.6
12.3±0.3
8.7±0.9
9.3±0.3
- - -
- - -
9.0±0.6
9.7±0.3
Trianthema spp.
195
- - -
7.3±0.3
- - -
- - -
- - -
- - -
- - -
- - -
390
- - -
9.7±0.3
- - -
- - -
- - -
- - -
- - -
- - -
780
9.7±0.7
12.3±0.9
- - -
- - -
- - -
- - -
- - -
- - -
S. incanum
195
- - -
9.7±1.8
- - -
- - -
- - -
- - -
- - -
- - -
390
8.7±0.9
13.0±0.9
- - -
7.3±0.3
- - -
7.3±0.3
- - -
7.0±0.0
780
11±0.7
15.3±0.9
- - -
10.3±0.9
9.3±1.5
10.0±0.6
9.0±0.6
9.7±0.7
Gentamicin
0.025
26.0±0.6
28.7±0.6
23.3±0.7
26.3±0.3
21.7±0.6
24.3±0.9
22.7±0.9
25.3±0.3
The values are mean ± SEM (n=3); significant at P<0.05; compared to gentamicin, compared to 195mg/ml, compared to 390mg/ml, and compared to 780mg/ml; the negative control has shown no antibacterial activity; Sta.: standard (ATCC) strains; Cli.: clinically isolated strains; - - -: no activity.
