Antibacterial Activities of Five Medicinal Plants in Ethiopia against Some Human and Animal Pathogens

Table 4

The antibacterial activity of chloroform extracts of five medicinal plants zone of inhibition in diameter (mm).

Plant species used	Concentration (mg/ml)	Mean zone of inhibition in diameter (mm)
		S. aureus	E. coli	P. aeruginosa
C. aurea (Ait.) Benth.	200	3.96	4.0	4.26
	100	3.5	2.33	3.53
	50	2.2	2.26	2.4
C. macrostachyus Del.	200	3.93	3.56	3.73
	100	3.0	3.0	3.03
	50	2.13	2.2	2.4
W. somnifera (L.) Dunal	200	3.4	3.06	2.6
	100	2.86	2.26	2.4
	50	1.8	2.0	2.0
N. tabacum L.	200	2.66	2.8	2.53
	100	2.73	2.46	2.4
	50	1.6	1.8	1.9
E. brucei Schwein.	200
	100
	50
Streptomycin	200
	100
	50
DMSO	200
	100
	50

NB: levels not connected by the same letter are significantly different.