Antimicrobial activity of Hermannia incana

Figures & data

Table 1.  Antibacterial activity of the methanol acetone and water extracts of the leaves and roots of Hermannia incana.

Bacteria	Gram +/-	^*MIC (mg/mL)
		MeOH extract		Acetone extract		Water extract		Chloramphenicol (μg/mL)	Streptomycin (μg/mL)
		Leaf	Root	Leaf	Root	Leaf	Root
Staphylococcus aereus	+	1.0	0.5	5.0	5.0	7.0	7.0	<2	<2
Staphylococcus epidermidis	+	0.5	0.5	5.0	5.0	7.0	10.0	<2	<2
Bacillus cereus	+	1.0	1.0	5.0	5.0	10.0	10.0	<2	<2
Micrococcus kristinae	+	0.5	1.0	5.0	5.0	7.0	7.0	<0.5	<2
Streptococcus faecalis	+	5.0	5.0	7.0	5.0	7.0	10.0	<2	<4
Escherichia coli	-	5.0	7.0	7.0	7.0	10.0	10.0	<2	<2
Pseudomonas aeruginosa	-	5.0	1.0	na^b	na	na	na	<10	<4
Shigella flexneri	-	7.0	1.0	7.0	10.0	10.0	10.0	<2	<2
Klebsella pneumoniae	-	7.0	7.0	na	na	na	na	<2	<2
Vibrio cholerae	-	1.0	1.0	7.0	7.0	na	na	<2	<2

^*Minimum inhibitory concentration, ^bna = not active.

Table 2.  Antifungal activity of the methanol acetone and water extracts of the leaves and roots of Hermannia incana.

Concentrations(mg/mL)	Growth inhibition (%)
	Leaf			Root
	A. flavus	A. niger	M. hiemalis	A. flavus	A. niger	M. hiemalis
Acetone extracts
10	77.31^e	61.48^e	62.50^d	72.22^c	70.74^c	88.61^c
5	68.06^d	48.33^d	46.11^c	55.00^b	58.61^b	73.33^b
1	47.50^c	41.11^c	29.44^b	0.00^a	0.00^a	0.00^a
0.5	33.33^b	28.61^b	0.00^a	0.00^a	0.00^a	0.00^a
0.1	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a
Control	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a
LC50	1.49	5.63	6.19	4.64	4.41	3.59
Methanol extracts
10	91.11^e	91.02^f	92.87^e	85.19^d	78.98^d	96.67^d
5	76.67^d	86.94^e	86.11^d	77.50^c	73.61^c	87.78^c
1	46.94^c	64.72^d	73.61^c	64.44^b	65.28^b	60.00^b
0.5	34.72^b	49.17^c	46.94^b	0.00^a	0.00^a	0.00^a
0.1	0.00^a	40.56^b	0.00^a	0.00^a	0.00^a	0.00^a
Control	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a
LC50	1.41	0.53	0.56	0.89	0.88	0.92
Water extracts
10	64.81^c	67.31^d	54.31^b	55.00^b	61.67^c	71.94^b
5	42.78^b	48.33^c	0.00^a	0.00^a	36.94^b	0.00^a
1	0.00^a	26.67^b	0.00^a	0.00^a	0.00^a	0.00^a
0.5	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a
0.1	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a
Control	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a	0.00^a
LC50	6.64	5.44	9.60	9.55	7.64	8.48

Values are means of percentage growth inhibition of three replicates: values within a column followed by the same superscript of the same species are not significantly different at p < 0.05 according to the LSD test. LC₅₀ values in mg/mL.