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Journal of Biological Sciences
  Year: 2008 | Volume: 8 | Issue: 3 | Page No.: 634-638
DOI: 10.3923/jbs.2008.634.638
Comparative Study on the in vitro Antibacterial Efficacy of Aqueous and Methanolic Extracts of Quercus infectoria Gall`s Against Cellulosimicrobium cellulans
M. Muskhazli, Y. Nurhafiza, A.A. Nor Azwady and E. Nor Dalilah

Abstract:
The in vitro antibacterial efficacy of aqueous and methanolic extract of Quercus infectoria Olivier (Fagaceae) galls was tested against Cellulosimicrobium cellulans using extract concentration ranging from 0.25 to 4 mg mL-1. Both types of extract showed significant inhibition of C. cellulans growth with strong correlation between extract concentrations and degrees of antibacterial activity for concentrations ranging from 0.5 to 4 mg mL-1. Although, slight reduction of average diameter of inhibition zones after 24 h of incubation for aqueous extract (0.96 ± 0.148 cm) compared to methanolic extract (1.00 ± 0.182 cm), both extracts still attained the MIC value beginning at a concentration of 0.5 mg mL-1 but established higher concentration for the MBC at 2 mg mL-1. The antibacterial activity of methanolic extract was also significantly affected by the temperature with an optimum inhibition zone being obtained at 30 °C (1.38 ± 0.05 cm) and this was reduced to approximately 20% at temperatures of above 50 °C.
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How to cite this article:

M. Muskhazli, Y. Nurhafiza, A.A. Nor Azwady and E. Nor Dalilah, 2008. Comparative Study on the in vitro Antibacterial Efficacy of Aqueous and Methanolic Extracts of Quercus infectoria Gall`s Against Cellulosimicrobium cellulans. Journal of Biological Sciences, 8: 634-638.

DOI: 10.3923/jbs.2008.634.638

URL: https://scialert.net/abstract/?doi=jbs.2008.634.638

 
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