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Table 2 Antimicrobial activity of the investigated plants in agar diffusion test.

From: Studies of the in vitro anticancer, antimicrobial and antioxidant potentials of selected Yemeni medicinal plants from the island Soqotra

   

Microbial strains tested

Multiresistant strains tested

Plant species

Extracts

Extract yield in %

S. a.

B. c.

M. f.

E. c.

P. e.

C. m.

S. e. 847

S. h. 535

S. a. NGR

Acacia pennivenia

Methanolic

Hot aqueous

12.18

5.97

22

20

12

-

22

20

16

-

14

-

-

-

18

8

14

-

20

18

Acanthospermum hispidum

Methanolic

Hot aqueous

16.14

7.22

16

12

-

-

22

15

-

-

-

-

-

-

18

8

12

-

20

12

Acridocarpus socotranus

Methanolic

Hot aqueous

10.46

4.75

15

18

-

-

16

16

-

-

-

-

-

-

14

18

10

14

14

22

Aloe perryi

Methanolic

Hot aqueous

20.27

18.82

-

-

-

-

-

-

-

-

-

-

-

-

18

-

10

-

20

14

Ballochia atro-virgata

Methanolic

Hot aqueous

14.91

5.70

12

12

-

-

-

-

-

-

-

-

-

-

10

-

-

-

16

-

Blepharis spiculifolia

Methanolic

Hot aqueous

5.04

5.51

12

-

-

-

-

-

-

-

-

-

-

-

10

-

-

-

16

-

Boswellia dioscorides

Methanolic

Hot aqueous

40.45

14.31

18

11

16

8

20

12

8

-

10

-

10

-

28

28

18

16

38

28

Boswellia socotrana

Methanolic

Hot aqueous

33.77

11.68

31

25

21

12

27

16

14

10

20

15

22

16

28

22

20

18

28

24

Capparis cartilaginea

Methanolic

Hot aqueous

8.33

10.02

10

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Commiphora ornifolia

Methanolic

Hot aqueous

19.50

10.72

16

11

13

8

19

12

-

-

-

-

-

-

18

18

14

10

18

20

Corchorus erodioides

Methanolic

Hot aqueous

10.46

4.95

10

-

9

-

12

11

-

-

-

-

-

-

-

-

-

-

-

-

Croton socotranus

Methanolic

Hot aqueous

14.91

6.78

10

-

8

-

15

-

-

-

-

-

-

-

18

20

10

10

24

24

Euclea divinorum

Methanolic

Hot aqueous

21.85

4.13

24

16

12

-

18

-

11

-

15

-

10

-

24

12

16

-

26

20

Euphorbia socotrana

Methanolic

Hot aqueous

19.74

11.75

16

-

11

-

18

-

-

-

-

-

-

-

20

20

12

12

26

26

Eureiandra balfourii

Methanolic

Hot aqueous

11.60

8.58

10

12

-

-

-

15

-

-

-

-

-

-

-

-

-

-

-

-

Ficus cordata

Methanolic

Hot aqueous

9.06

10.50

10

16

-

-

-

-

-

-

-

-

-

-

-

-

-

-

12

14

Glossonema revoili

Methanolic

Hot aqueous

16.34

8.53

20

9

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Hibiscus noli-tangere

Methanolic

Hot aqueous

10.61

4.92

10

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Hypoestes pubescens

Methanolic

Hot aqueous

21.16

7.80

8

15

-

-

-

14

-

-

-

-

15

12

-

-

-

-

-

-

Lannea transulta

Methanolic

Hot aqueous

8.04

9.15

13

14

-

-

14

16

-

-

-

-

-

12

16

22

-

12

16

22

Leucas samhaensis

Methanolic

Hot aqueous

11.47

5.25

-

19

-

14

20

24

-

-

-

-

-

-

14

18

12

14

18

20

Leucas virgata

Methanolic

Hot aqueous

14.11

3.37

18

17

11

-

17

15

-

-

-

-

-

-

16

20

12

12

22

26

Lycium sokotranum

Methanolic

Hot aqueous

10.93

5.05

20

17

-

-

15

-

-

-

-

-

-

-

12

-

12

-

20

20

Maerua angolensis

Methanolic

Hot aqueous

22.01

13.80

-

-

-

-

-

-

-

-

-

-

-

-

-

12

-

-

-

16

Rhus thyrsiflora

Methanolic

Hot aqueous

5.88

11.50

20

20

12

12

18

21

-

-

-

-

-

-

18

20

14

16

24

26

Teucrium sokotranum

Methanolic

Hot aqueous

12.42

4.43

17

22

14

10

22

15

-

-

-

-

-

-

14

18

10

14

16

20

Ampicillin 10 μg/disc

Gentamicin 10 μg/disc

Amphotericin 10 μg/disc

  

28

N.T.

N.T.

24

N.T.

N.T.

30

N.T.

N.T.

N.T.

15

N.T.

N.T.

17

N.T.

N.T.

N.T.

10

-

N.T.

N.T.

-

N.T.

N.T.

-

N.T.

N.T.