Antibacterial Activities of Calpurnia aurea against Selected Animal Pathogenic Bacterial Strains
Table 6
Antibacterial activity of crude extracts of the root and antibiotics against the test pathogens (mean ± SD, n = 3).
Tested pathogens
Zone of inhibition
Crude extract solvents from the root
Antibiotics
Conc. Ml (mg)
Water (mean ± SD) (mm)
Ethanol (mean ± SD) (mm)
Conc. Ml/Mg
Ciprofloxacin (mean ± SD) (mm)
Amoxicillin (mean ± SD) (mm)
Penicillin (mean ± SD) (mm)
Tetracycline (mean ± SD) (mm)
S. aureus
25
1.23 ± 0.40Aa
6.37 ± 0.50Aa
0.1
11.83 ± 0.40Ab
13.37 ± 0.31Ab
—
21.13 ± 1.07Cf
50
3.9 ± 1.32Da
7.7 ± 0.50Bb
0.2
11.93 ± 1.03Ab
20.1 ± 1.59Cd
—
28.63 ± 3.06Ef
S. pyogenes
25
3.87 ± 0.83Da
9.37 ± 0.74Cb
0.1
29.13 ± 1.97Ec
15.7 ± 0.76Bd
12.6 ± 0.58Ab
11.47 ± 0.66Ab
50
4.1 ± 0.18Ea
11.73 ± 1.39Db
0.2
30.47 ± 0.88Fc
29.97 ± 1.71Fd
30.13 ± 0.83Fe
25.47 ± 4.35Df
L. monocytogenes
25
1.67 ± 0.44Aa
6.1 ± 0.47Aa
0.1
19.6 ± 0.56Cc
17.83 ± 0.87Bd
16.7 ± 0.80Cd
31.33 ± 1.61Ff
50
1.7 ± 0.36Aa
9.5 ± 0.56Cb
0.2
25.8 ± 1.44Dc
23.23 ± 4.33Dd
28.2 ± 2.08Ee
31.63 ± 0.66Ff
E. coli O157 H:7
25
3.47 ± 0.49Da
11.87 ± 1.19Db
0.1
17.3 ± 3.62Bc
13.03 ± 2.61Ab
—
25.53 ± 3.16Df
50
3.43 ± 0.49Da
13.87 ± 1.09Fb
0.2
19.73 ± 0.94Cc
16.8 ± 0.78Bd
—
27.87 ± 0.53Ef
S. typhi
25
0.8 ± 0.09Bg
9.53 ± 0.50Cb
0.1
16.27 ± 1.19Bc
26.57 ± 2.36Ed
15.2 ± 0.70Cd
23.77 ± 1.35Cf
50
1.57 ± 0.36Aa
12.57 ± 1.18Eb
0.2
22.27 ± 1.14Dc
26.87 ± 1.62Ed
23.87 ± 3.72Dc
28.13 ± 3.62Ef
C. jejuni
25
1.27 ± 0.3Aa
11.13 ± 1.08Db
0.1
29.03 ± 1.26Ec
19.97 ± 0.77Cd
23.1 ± 2.0De
15.67 ± 0.90Bf
50
2.63 ± 0.28Ca
9.37 ± 0.57Cb
0.2
31.37 ± 0.86Fc
23.6 ± 3.49Dd
25.6 ± 2.25Ee
18.2 ± 1.49Bf
n = number of experimental replicates; SD = standard deviation; means with the same letter (lower case) in the same row are not significantly different; means with the same letter (upper case) in the same column are not significantly different.