African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5165

Full Length Research Paper

Antibacterial activity of propolis and honey against Staphylococcus aureus and Escherichia coli

M. Motior Rahman1,2*, Allan Richardson1 and M. Sofian-Azirun2
  1Centennial College, Toronto, Canada. 2Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.  
Email: [email protected], [email protected]

  •  Accepted: 06 August 2010
  •  Published: 18 September 2010

Abstract

 

The disc diffusion method, minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC) and gradient-plate techniques were implemented to evaluate the antibacterial activity of honey and propolis against Staphylococcus aureusand Escherichia coli. The growth of S. aureus was inhibited by application of propolis and honey at concentrations of 2.74 to 5.48 mg ml-1 and 375.0 at mg ml-1, respectively at both MIC and MBC. The greater inhibition zones (13.0 ± 0.09 to 15.0 ± 0.11 mm) were observed from propolis at concentrations of 2.74 to 5.48 mg ml-1 in the disc diffusion method which was closely correlated with the MIC, MBC and gradient-plate technique results. The combined results obtained from the disc diffusion test, MIC, MBC and gradient-plate techniques suggested that propolis at concentrations of 2.74 to 3.5 and 3.5 mg ml-1 was effective to inhibit S. aureus and E. coli, respectively. On the contrary, honey was effective to inhibit S. aureus at the concentration of 375.0 mg ml-1 but failed to inhibit E. coli growth at same concentration. The combined results from all methods indicated that both propolis and honey had antibacterial activity against S. aureus. Present findings also suggested that S. aureus is more susceptible to the effect of the propolis than its Gram-negative counterpart E. coli.

 

Key words: Antibacterial activity, honey, propolis, MIC, MBC, disc diffusion, Escherichia coli, Staphylococcus aureus