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Title: Antibacterial activity of black pepper (Piper nigrum Linn.) with special reference to its mode of action on bacteria
Authors: Karsha, Pavithra Vani
Lakshmi, O Bhagya
Keywords: Antibacterial activity;Black pepper;Piper nigrum;Gram positive bacteria;Gram negative bacteria;Nucleic acids
Issue Date: Jun-2010
Publisher: CSIR
IPC Code:  Int. cl.8 ¾ A61K 36/00, A61K 36/67, A61K 131/00, A61P 31/00, A61P 31/04
Abstract: During present study the antibacterial activity of black pepper (Piper nigrum Linn.) and its mode of action on bacteria were done. The extracts of black pepper were evaluated for antibacterial activity by disc diffusion method. The minimum inhibitory concentration (MIC) was determined by tube dilution method and mode of action was studied on membrane leakage of UV260 and UV280 absorbing material spectrophotometrically. The diameter of the zone of inhibition against various Gram positive and Gram negative bacteria was measured. The MIC was found to be 50-500ppm. Black pepper altered the membrane permeability resulting the leakage of the UV260 and UV280 absorbing material i.e., nucleic acids and proteins into the extra cellular medium. The results indicate excellent inhibition on the growth of Gram positive bacteria like Staphylococcus aureus, followed by Bacillus cereus and Streptococcus faecalis. Among the Gram negative bacteria Pseudomonas aeruginosa was more susceptible followed by Salmonella typhi and Escherichia coli.
Page(s): 213-215
Appears in Collections:IJNPR Vol.1(2) [June 2010]

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