Antibacterial activity of aqueous and ethanol extracts from Vernoniaamygdalina was carried out. Using different parts (leaves and roots) its effects on Escherichia coli, Staphylococcus aurous, Staphylococcus albus, Streptococcus pneumonia, Klebsiellapneumonia, Pseudomonas aeruginosa was investigated. Agar well diffusion and filter paper disc methods were used, upon which a minimum inhibitory concentration was determined. The widest zone of inhibition (25 mm) was observed by ethanol extract of Vernonia amygdalina leaf extract on Streptococcus pneumonia and Klebsiella pneumonia. The study confirmed that the Vernonia amygdalinahad a stronger effect on Gram positive bacteria than the Gram-negative bacteria with exception of E. coli. This finding providesthe evidence that supports the use of Vernoniaamygdalina in traditional medicine.
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