PJB-2021-619
ANTIMICROBIAL EFFECT OF ONION (ALLIUM CEPA) ON GRAM-POSITIVE AND GRAM-NEGATIVE BACTERIAL STRAINS
NAILA RIAZ
Abstract
Medicinal plants are considered rich source of ingredients, known to be a potential source of therapeutics or curative aids. The plant product or natural products have an important role in disease prevention and treatment through the enhancement of antioxidant activity and inhibition of bacterial growth.The current study is aimed to investigate the antimicrobial activity of onion extract (Allium cepa) against selected bacterial strains, named as Bacillus cereus, Bacillus subtilis, Escherichia coli and Staphylococcus aureus. Onion extract was applied on bacterial strains with 150mg/ml to 250mg/ml concentration. Extracts showed effective results against all test strains. The MIC of ethanolic extract of onion was proved to be most effective against the Bacillus subtilis at 200mg/ml. Effect of extracts was tested by heating extract solution at diverse temperature and at different pH. Zone of inhibition was measured. The means of all zones of inhibition was compared by using one – way ANOVA
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