TABLE 5.

In-vitro antibacterial activity of Skimmia anquetilia root extracts against tested bacterial strains.

Organic extract	Concentration (mg mL–1)	Zone of inhibition (mm) (Mean ± SD)
		Gram-negative bacteria				Gram-positive bacteria
		Escherichia coli	Pseudomonas aeruginosa	Klebsiella pneumoniae	Salmonella typhi	Staphylococcus aureus
n-hexane	10	14.0 ± 2.64	14.0 ± 2.0	11.0 ± 9.84	14.0 ± 3.0	12.0 ± 1.73
	20	14.0 ± 2.0	13.0 ± 1.0	15.0 ± 3.0	12.0 ± 1.0	13.0 ± 1.0
	40	14.0 ± 3.0	13.0 ± 2.0	17.0 ± 1.0	13.0 ± 2.0	13.0 ± 1.73
	80	16.0 ± 2.64	15.0 ± 3.0	17.0 ± 2.0	17.0 ± 2.64	15.0 ± 2.3
	160	15.0 ± 3.6	15.0 ± 1.0	17.0 ± 1.73	17.0 ± 1.0	16.0 ± 3.0
Ethyl acetate	10	12.0 ± 1.73	11.0 ± 1.73	13.0 ± 1.73	11.0 ± 1.0	15.0 ± 3.6
	20	12.0 ± 1.0	11.0 ± 1.0	12.0 ± 1.0	11.0 ± 1.0	9.0 ± 7.80
	40	13.0 ± 1.0	12.0 ± 2.0	14.0 ± 1.0	13.0 ± 1.0	14.0 ± 1.0
	80	14.0 ± 1.0	15.0 ± 1.73	15.0 ± 1.73	15.0 ± 1.73	15.0 ± 0
	160	16.0 ± 1.0	18.0 ± 1.0	17.0 ± 1.0	16.0 ± 2.0	17.0 ± 1.0
Methanol	10	10.0 ± 1.73	11.0 ± 1.0	12.0 ± 1.0	–	7.0 ± 6.08
	20	8.0 ± 7.0	11.0 ± 1.0	13.0 ± 3.0	–	14.0 ± 2.64
	40	12.0 ± 0	12.0 ± 1.0	13.0 ± 1.73	–	13.0 ± 1.0
	80	13.0 ± 1.0	13.0 ± 1.73	13.0 ± 1.0	–	14.0 ± 1.0
	160	14.0 ± 1.0	14.0 ± 1.0	16.0 ± 1.0	–	17.0 ± 3.6
Positive control	10 μg disc	29.6 ± 1.52	31.0 ± 1.0	30.3 ± 1.52	30.6 ± 0.57	30.3 ± 1.52

Data are means of three replicates (n = 3) ± standard deviation.