African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12486

Full Length Research Paper

Antibacterial activity of the crude extract of Chinese green tea (Camellia sinensis) on Listeria monocytogenes

Mbata, T. I.1*, Debiao, L. U.2 and  Saikia, A.3
  1Department of Applied Microbiology and Brewing, Nnamdi Azikiwe University, P. M. B 5025, Awka, Nigeria. 2Cash Crops Bureau, Zhejianq Provincial Department of Agriculture, Hangzhou, 310020, China. 3Department of Horticulture, Assam Agricultural University, Jorhat 785013, Assam, India.
Email: [email protected]

  •  Accepted: 06 October 2006
  •  Published: 16 May 2008

Abstract

 

The antibacterial activity of the methanol and aqueous extract of Camellia sinensison Listeria monocytogenes were investigated using agar-gel diffusion, paper disk diffusion and microbroth dilution techniques. The results obtained showed that methanol and water extract exhibited antibacterial activities against L.monocytogenes. The leaf extract produced inhibition zone ranging from 10.0 – 20.1 mm against the test bacteria. The methanol extracts of the test plant produces larger zones of inhibition against the bacteria than the water extract. The minimum inhibitory concentration (MIC) for the methanol and water leaf extract was 0.26 and 0.68 mg/ml, respectively.

 

Key words: Antibacterial activity, Chinese green tea, Listeria monocytogenes.

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This article is published under the terms of the Creative Commons Attribution License 4.0

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