Table 2 Mean of inhibition zones (diameter in millimeters) after in vitro exposure of isolates to A. indica methanol extract in different concentrations

Bacterial isolates

50

25

12.5

6.25

3.125

1.5

E. coli (n = 70)

17.5 ± 1

15.5 ± 1

13.5 ± 0.5

12 ± 0.8

10 ± 0.5

N.A

K. pneumoniae (n = 9)

19 ± 1.6

17 ± 2

15.4 ± 2

13.5 ± 1.8

11 ± 1.9

N.A

Citrobacter spp. (n = 1)

22 ± 1

20 ± 1.5

18 ± 0.5

16 ± 1.1

11 ± 0.8

N.A

E. faecalis (n = 8)

16.5 ± 1.8

14.5 ± 2.2

13 ± 2.1

9 ± 1.6

8 ± 1.9

N.A

P. aeruginosa (n = 5)

21 ± 1

19 ± 0.8

17 ± 1.3

16 ± 1.5

13 ± 1.8

N.A

Proteus spp. (n = 5)

17.5 ± 1.8

15 ± 1.6

11 ± 1.2

9 ± 0.9

8 ± 0.9

N.A

S. epidermidis (n = 1)

15 ± 1.1

14 ± 1.5

13 ± 1.2

12 ± 0.5

8 ± 0.5

N.A

S. aureus (n = 1)

13 ± 0.5

11 ± 0.8

10 ± 0.7

9 ± 0.4

8 ± 0.5

N.A

E. coli ATCC® 25,922

18 ± 0.4

16 ± 1

14 ± 1

12.5 ± 0.4

8 ± 1

NA

S. aureus ATCC® 25,923

22 ± 0.8

20 ± 1.7

18 ± 2

15 ± 2

10 ± 0.5

NA