|
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.
*Corresponding author. E-mail:
theoiyke@yahoo.com.
Accepted 6 October, 2006 |
|
The antibacterial activity
of the methanol and aqueous extract of Camellia sinensis
on 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. |
