›› 2011, Vol. 6 ›› Issue (4): 163-167.

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Antibacterial activity of the methanolic extract of stem bark of Spondias pinnata, Moringa oleifera and Alstonia scholaris

Bolin Chetia *; Satyabrat Gogoi
  

  1. Department of Chemistry, Dibrugarh University, Dibrugarh 786004, Assam, India
  • Received:2011-02-28 Revised:2011-05-15 Online:2011-08-20 Published:2011-08-20
  • Contact: Bolin Chetia

Abstract: In this work we examined the antibacterial activity of the methanolic extract of the stem bark of Spondias pinnata, Moringa oleifera and Alstonia scholaris. The antibacterial activity of these plant materials was tested against six different bacteria: Gram-positive (Bacillus subtilis, Bacillus cereus and Staphylococcus aureus) and Gram-negative (Escherichia coli, Proteus mirabilis and Pseudomonas aeruginosa) by the agar dilution method. Of the three plants investigated, Alstonia scholaris showed highest antibacterial activity having a minimum inhibitory concentration (MIC) of 32 μg/ml against Bacillus subtilis, Escherichia coli and Proteus mirabilis.

Key words: antibacterial activity, medicinal plants, methanol extract.antibacterial activity, medicinal plants, methanol extract.

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