Table 3.

Antimicrobial activity of aqueous and methanolic leaf extracts of Catharanthus roseus and Moringa oleifera against selected bacterial strains.

Leaf Extracts (50 μg/mL)	Zone of inhibition (mm)
	B. subtilis	S. aureus	E. coli
C. roseus
Aqueous	22 ± 0.33	23 ± 0.18∗∗	25 ± 0.25
Methanolic	23 ± 0.23	23 ± 0.44∗∗	20 ± 0.41
M. oleifera
Aqueous	23 ± 0.23∗	20 ± 0.25	18 ± 0.41
Methanolic	23 ± 0.65∗	24 ± 0.44	16 ± 0.23
Tetracycline (1 μg/mL)	29 ± 0.25	36 ± 0.33	28 ± 0.46

∗Statistical significance at p < 0.05; ∗∗ statistical significance at p < 0.01.