Zone of Inhibition (mm)

Concentration of Extract (mg/ml)

Test Organisms

 500

 250

 125

 62.5

 Control

p- value

S. aureus

23.33 ± 0.9

20.00 ± 1.2

16.67 ± 0.9

8 .00 ± 1.2

21.00 ± 0.6

0.000

E. coli

21.33 ± 1.5

19.00 ± 0.6

16.00 ± 1.5

10.00 ± 1.2

18.17 ± 0.6

0.013

S. typhi

26.33 ± 1.9

19.67 ± 0.9

19.33 ± 0.9

12.67 ± 1.5

21.33 ± 0.9

0.000

A. niger

16.33 ± 2.2

13.67 ± 3.0

12.33 ± 1.5

5.67 ± 1.2

31.33 ± 0.9

0.000