Seaweed

Solvent

Zone of inhibition (mm)

Gram positive bacteria

Gram negative bacteria

S. aureus

E. coli

Klebsiella sp.

Pseudomonas sp.

Salmonella sp.

H. musciformis

Ethanol

10 ± 0.75

10 ± 0.28

13 ± 0.30

12 ± 0.80

10 ± 0.35

Methanol

7 ± 0.50

11 ± 0.80

8 ± 0.75

10 ± 0.90

10 ± 0.85

Acetone

14 ± 0.26

6 ± 0.38

8 ± 0.90

9 ± 0.57

6 ± 0.63

Distilled water

10 ± 0.45

12 ± 0.25

10 ± 0.39

10 ± 0.47

13 ± 0.77

E. intestinalis

Ethanol

13 ± 0.88

14 ± 0.76

13 ± 0.45

13 ± 0.86

11 ± 0.28

Methanol

15 ± 0.35

12 ± 0.90

13 ± 0.36

15 ± 0.65

14 ± 0.63

Acetone

15 ± 0.55

8 ± 0.50

10 ± 0.32

13 ± 0.28

10 ± 0.30

Distilled water

11 ± 0.44

7 ± 0.57

12 ± 0.90

12 ± 0.32

14 ± 0.58

Gentamicin

(Control)

18 ± 0.25

19 ± 0.50

15 ± 0.41

17 ± 0.34

18 ± 0.40