Antibacterial potential of methanolic extract of Syzygiumaromaticum (clove) against different bacterial strains
Paper Details
Antibacterial potential of methanolic extract of Syzygiumaromaticum (clove) against different bacterial strains
Abstract
The flower buds of Syzygium aromaticum (Cloves) are a well-known spice, prescriped for treatment from some microbial diseases since ancient civilizations and in traditional medicine today. In the currenrt investigation, the methanolic extract of cloves was tested against 4 Gram-positive bacteria , namely Bacillus cereus ATCC10876, Staphylococcus saprophyticus ATCC 43867, Enterococcus faecalis ATCC 29212 and Staphylococcus epidermidis ATCC 12228. In addition to 5 strains of Gram-negative bacteria , namely Proteus vulgaris ATCC 6380, Klebsiella pneumoniae ATCC 27736, Salmonella typhimurium ATCC 14028, Shigella flexneri ATCC 12022 and Escherichia coli ATCC 25922, using two diffusion methods (Cup-plate and disc diffusion methods), besides MIC and MBC testings. The extract showed noticable dose-dependant antibacterial activity against all tested bacterial strains with varied degrees, and there was no significant differences between the results of the cup-plate diffusion assay and the disc-diffusion assay. Moreover, MIC values were between 3.9 to 125 mg/ml, and MBC values ranged between 7.8 to 125 mg/ml, which was higher than the MIC’s, the MBC/MIC ratio indicating that the extract has a bactericidal attitude, which makes it suitable source for the formulation of new antibacterial drugs.
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