Table 3.

Antimicrobial activity of methanol leaf extracts of J. flava (JFL) and L. welwitschii (LWL) by agar diffusion method. Mean zones of growth inhibition (plus diameter of well) are mean (mm) of 3 independent experiments, mean ± SD, n = 3 replicates, and diameter of well/cup = 8 mm.

Mean zones of growth inhibition (mm)
Extract (mg/mL)	Test organisms
	S. aureus   ATCC 25923	B. subtilis   NCTC 10073	E. coli   ATCC 25922	P. aeruginosa   ATCC 27853	C. albicans
JFL
10	10.00 ± 0.50	10.50 ± 0.50	10.00 ± 0.50	10.00 ± 0.50	11.50 ± 0.50
20	10.50 ± 0.50	12.00 ± 0.50	11.50 ± 0.45	12.00 ± 0.50	12.50 ± 0.55
50	12.50 ± 0.45	14.50 ± 0.45	13.55 ± 0.50	13.50 ± 0.50	15.50 ± 0.50
LWL
10	10.50 ± 0.50	13.50 ± 0.50	14.50 ± 0.50	0.0	11.50 ± 0.50
20	12.00 ± 0.50	15.50 ± 0.55	19.50 ± 0.50	12.00 ± 0.50	13.50 ± 0.50
50	15.50 ± 0.50	18.00 ± 0.50	25.55 ± 0.50	14.50 ± 0.55	15.50 ± 0.50
CPC	25.5 ± 0.50	31.00 ± 0.50	30.50 ± 0.50	17.50 ± 0.50	nd
CTZ	nd	nd	nd	nd	25.50 ± 0.50

Reference antimicrobial agents: CPC: chloramphenicol (1 mg/mL); CTZ: clotrimazole (1 mg/mL). nd: not determined.