Sample

b

c

d

b

c

d

b

c

d

b

c

d

Blank

Dose, µL

25

50

100

200

−ve ZOI

+ve ZOI

Micro organism

Zone of inhibition*

E. coli

0

0

0

14.80

15.08

17.00

12.39

16.52

20.34

12.3

14.07

22.67

0

22.75

K. pneumoniae

0

12.35

13.81

15.60

17.05

26.18

14.73

18.8

20.7

16.27

23.92

27.31

0

20.61

B. Cereus

0

0

0

10.33

12.34

18.23

17.71

22.18

26.37

22.39

23.21

29.34

0

25.5

S. aureus

0

0

11.93

15.71

16.90

18.47

15.67

16.83

19.08

15.81

19.92

20.2

0

27.44

C. lbicans

0

0

0

12.64

12.09

12.93

11.27

14.16

16.1

17.27

20.83

22.24

0

0

Aspergillus

0

0

0

13.54

11.67

11.09

11.6

15.24

15.77

21.42

22.42

23.56

0

0