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Table 2 Antimicrobial activity of 70% ethanolic crude extract and fractions of T. bangwensis leaves against test organisms

From: Assessment of the phytochemical composition and antimicrobial properties of Tapinanthus bangwensis leaves hosted by the branches of Persea americana

Extracts

Organisms

Antimicrobial Activity (Zones of Inhibition in mm)

 

100 mg/mL

50 mg/mL

25 mg/mL

12.5 mg/mL

6.25 mg/mL

Standard

Aqueous Fraction

S. aureus

14.67 ± 0.58

13.00 ± 0.00

12.00 ± 0.00

9.67 ± 0.58

6.00 ± 0.00

23.67 ± 0.58

S. saprophyticus

15.00 ± 0.00a

13.67 ± 0.58b

12.00 ± 0.00

11.00 ± 0.00

8.00 ± 0.00

25.33 ± 0.58

E. coli

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

18.67 ± 0.58

S. typhi

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

25.00 ± 0.00

C. albicans

14.67 ± 0.58c

12.00 ± 0.00d

9.67 ± 0.58

6.00 ± 0.00

6.00 ± 0.00

24.67 ± 0.58

A. niger

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

21.00 ± 1.00

Chloroform Fraction

S. aureus

13.33 ± 0.58

11.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

23.67 ± 0.58

S. saprophyticus

15.00 ± 0.00a

13.67 ± 0.58b

12.00 ± 0.00

11.00 ± 0.00

8.00 ± 0.00

25.33 ± 0.58

E. coli

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

18.67 ± 0.58

S. typhi

11.67 ± 0.58

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

25.00 ± 0.00

C. albicans

13.67 ± 0.58

11.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

24.67 ± 0.58

A. niger

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

21.00 ± 1.00

Ethyl Acetate Fraction

S. aureus

23.00 ± 0.00e

21.00 ± 0.00

20.00 ± 0.00

19.00 ± 0.00

18.00 ± 0.00

23.67 ± 0.58e

S. saprophyticus

27.67 ± 0.58

25.33 ± 0.58f

22.00 ± 0.00

20.00 ± 0.00

18.00 ± 0.00

25.33 ± 0.58f

E. coli

18.33 ± 0.58 g

16.00 ± 0.00

15.00 ± 0.00

14.00 ± 0.00

13.00 ± 0.00

18.67 ± 0.58 g

S. typhi

14.00 ± 1.00

11.67 ± 0.58

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

25.00 ± 0.00

C. albicans

19.67 ± 0.58

17.67 ± 0.58

15.00 ± 0.00

13.00 ± 0.00 h

11.00 ± 0.00i

24.67 ± 0.58

A. niger

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

21.00 ± 1.00

Petroleum Ether Fraction

S. aureus

17.67 ± 0.58

15.00 ± 0.00j

13.00 ± 0.00

12.00 ± 0.00 k

10.00 ± 0.00

23.67 ± 0.58

S. saprophyticus

12.00 ± 0.00

9.67 ± 0.58

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

25.33 ± 0.58

E. coli

17.67 ± 0.58 g

15.00 ± 0.00

12.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

18.67 ± 0.58 g

S. typhi

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

25.00 ± 0.00

C. albicans

13.67 ± 0.58c

12.00 ± 0.00d

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

24.67 ± 0.58

A. niger

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

21.00 ± 1.00

70% Ethanol Crude Extract

S. aureus

16.00 ± 0.00

15.00 ± 0.00j

14.00 ± 0.00

11.33 ± 0.58 k

7.67 ± 0.58

23.67 ± 0.58

S. saprophyticus

18.67 ± 0.58

16.67 ± 0.58

14.33 ± 0.58

11.67 ± 0.58

10.00 ± 0.00

25.33 ± 0.58

E. coli

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

18.67 ± 0.58

S. typhi

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

25.00 ± 0.00

C. albicans

16.00 ± 0.00

15.00 ± 0.00

14.00 ± 0.00

12.33 ± 0.58 h

10.33 ± 0.58i

24.67 ± 0.58

A. niger

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

6.00 ± 0.00

21.00 ± 1.00

  1. The susceptibility of the microorganisms to the extracts was tested using the agar well diffusion method. Values are mean ± SD (n = 3). 6.00 ± 0.00 mm = No zone of inhibition
  2. akMean values with same alphabet represent insignificant difference (p > 0.05) in antimicrobial activity analyzed by Tukey’s multiple comparisons test