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Table 5 Mean ± SD Zone of Inhibition of Symphonia globulifera and Allophylus abyssinicus extracts and combinations against Pseudomonas aeruginosa

From: Phytochemical profile and antimicrobial activity of the leaves and stem bark of Symphonia globulifera L.f. and Allophylus abyssinicus (Hochst.) Radlk

Extract

Mean ± SD Zone of Inhibition (mm) of Pseudomonas aeruginosa

1000

mg/ml

500

mg/ml

250

mg/ml

125

mg/ml

62.5

mg/ml

31.25

mg/ml

15.62

mg/ml

7.81

mg/ml

3.90

mg/ml

1.95 mg/ml

Cipro

floxacin

AALW

24.75 ± 1.89ac

15.00 ± 2.16efg

10.75 ± 0.50d

6.75 ± 0.50 g

4.25 ± 0.50

2.50 ± 0.58d

0.75 ± 0.50d

0

0

0

21.75 ± 1.26

AALM

19.75 ± 0.96ef

15.75 ± 0.50df

10.75 ± 0.50d

4.25 ± 1.50hi

3.00 ± 0.00

1.00 ± 0.82e

0

0

0

0

16.75 ± 0.50

AASW

20.25 ± 0.96e

16.50 ± 1.00d

14.00 ± 0.82b

12.00 ± 0b

9.00 ± 0.82c

5.50 ± 1.29b

2.25 ± 0.50c

0.75 ± 0.50b

0

0

21.00 ± 0.82

AASM

19.50 ± 1.00eg

15.50 ± 0.58dg

13.00 ± 0bc

10.75 ± 0.96 cd

8.75 ± 0.50c

5.00 ± 0.82b

4.00 ± 1.63a

3.25 ± 0.96a

0.50 ± 0.00a

0

21.75 ± 0.96

SGLW

24.00 ± 1.41bcd

21.00 ± 0.82a

16.75 ± 0.96a

14.25 ± 0.96a

11.25 ± 0.50a

3.50 ± 0.58 cd

0

0

0

0

17.00 ± 0.82

SGLM

16.25 ± 1.26 h

11.00 ± 0.82 h

6.50 ± 0.58e

4.00 ± 0.82hj

2.00 ± 0.82f

1.25 ± 0.50e

0

0

0

0

20.75 ± 0.96

SGSW

16.25 ± 0.96 h

13.25 ± 0.50

7.00 ± 0.82e

3.25 ± 0.50ij

0

0

0

0

0

0

17.50 ± 1.29

SGSM

16.00 ± 0.82 h

10.75 ± 0.96 h

7.00 ± 0.82e

4.50 ± 0.58 h

1.75 ± 0.96f

0.75 ± 0.50e

0

0

0

0

20.75 ± 0.96

SGLW + AALW

25.75 ± 1.50a

20.75 ± 0.96ab

16.25 ± 0.50a

12.75 ± 0.96b

10.25 ± 0.50b

7.00 ± 1.41a

3.75 ± 0.50ab

1.50 ± 0.58b

0

0

19.00 ± 0.82

SGLW + SGLM

23.00 ± 0.82d

15.75 ± 0.96df

12.25 ± 0.50c

9.25 ± 0.50e

6.25 ± 0.96de

3.50 ± 0.58 cd

0

0

0

0

17.75 ± 0.50

AASW + AALW

20.25 ± 0.96e

16.00 ± 0de

13.75 ± 0.50b

11.75 ± 0.50bc

9.00 ± 0.82c

5.00 ± 1.16b

3.00 ± 0bc

1.50 ± 0.56b

0.50 ± 0.58a

0

21.00 ± 0.82

SGLM + AASW

23.00 ± 0.00d

19.25 ± 0.96c

13.75 ± 1.50b

10.00 ± 0.00de

7.00 ± 0.82d

3.75 ± 0.50c

1.25 ± 0.96d

0

0

0

20.75 ± 0.96

SGLW + AASW

18.25 ± 0.50 fg

15.50 ± 1.00dg

12.00 ± 0.82c

8.00 ± 0.82f

5.75 ± 0.50e

3.50 ± 0.58 cd

1.25 ± 0.96d

0

0

0

20.25 ± 0.50

AALW + SGLM

25.25 ± 2.22ab

19.50 ± 1.00bc

16.75 ± 0.96a

12.25 ± 0.96b

10.75 ± 0.50ab

0

0

0

0

0

21.25 ± 0.96

  1. a−j In columns mean values sharing a superscript letter are not significantly different (p > 0.05) as based on the LSD multiple Comparison test
  2. AALW Allophylus abyssinicus leaf water extract, AALM Allophylus abyssinicus leaf methanol extract, AASW Allophylus abyssinicus stem bark water extract, AASM Allophylus abyssinicus stem bark methanol extract, SGLW Symphonia globulifera leaf water extract, SGLM Symphonia globulifera leaf methanol extract, SGSW Symphonia globulifera stem bark water extract, SGSM Symphonia globulifera stem bark methanol extract