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Table 3 Bacterial growth inhibition zones in agar well diffusion method treated with 50 mg/mL of methanol, acetone and aqueous extract of Moringa oleifera seed

From: Water purification and antibacterial efficacy of Moringa oleifera Lam

Organisms

Zone of inhibition (mm) ± standard deviation

Positive control (ciprofloxacin)

p value using LSD

Seeds extract

Methanol

Acetone

Aqueous

E. coli (ATCC 2592)

9.66 ± 0.57b

13.33 ± 0.57c

8.33 ± 0.57a

33.33 ± 0.57d

0.008

E. coli (clinical isolate)

15.66 ± 0.57b

18.00 ± 0.00c

8.33 ± 0.57a

32.66 ± 2.3d

0.04

Salmonella typhii (clinical isolate)

15.33 ± 0.57b

19.00 ± 0.00c

7.66 ± 0.57a

29.33 ± 0.57d

0.026

Shigella dysenteriae (clinical isolate)

17.00 ± 0.00b

18.66 ± 0.57c

7.66 ± 1.15a

29.00 ± 0.00d

0.003

  1. Means followed by the same letter in a row, are not significantly different at p = 0.05, using LSD