Phytochemical screening and antimicrobial studies on the methanolic bulb extract of Allium sativum L.

摘要

Methanolic extract of the bulb of?Allium sativum?was screened for phytochemical and antimicrobial properties. The crude extract of?A. sativum?bulb showed positive results for carbohydrates, glycosides and proteins in high concentrations; alkaloids, saponins, reducing sugars, oils and steroids in medium concentrations, while flavonoids and acidic compounds were present in low amounts. Tannins, resins and terpenoids were however absent in the extract. All the six tested microorganisms exhibited varied susceptibility to the plant extract. The minimum inhibitory concentration (MIC) of the organisms were, 50 mg/ml?for?Salmonella paratyphi, 25 mg/ml?for?Bacillus subtilis, 100 mg/ml?for?Klebsiella pneumoniae, 12.5 mg/ml?for?Candida albicans, 3.12 mg/mlfor?Candida paralopsis?and 6.25 mg/ml?for?Candida tropicalis.?A.?sativum?showed both antifungal and antibacterial properties.