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In vitro
antibacterial activities of
crude extracts of Nauclea latifolia and
Daniella oliveri
El-Mahmood, A. M* Doughari, J. H. and Chanji, F. J.
Department
of Microbiology, School of Pure and Applied Sciences,
Federal University of Technology, P.
M. B 2076 Yola 640002,
Nigeria.
*Corresponding author: E-mail:
elmahmu@yahoo.com.
Accepted 18
February, 2008 |
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The
comparative studies of extracts of leaves, barks and roots
of Nauclea latifolia and Daniella oliveri with
respect to their phytochemical and antibacterial properties
was carried out. Preliminary screening for phytochemical
components showed that both plants had similar constituents,
namely tannins, alkaloids and glycosides, but variable
proportions of saponins. The antibacterial screening of the
water and ethanolic extracts of the various plant materials
were carried out against pathogenic bacteria including
Pseudomonas aeruginosa, Klebsiealla pneumonia, Escherichia
coli, Staphylococcus aureus and Shigella dysenteriae.
Ethanolic extracts were more potent than aqueous
extracts and activity were concentration dependent. The Gram
positive bacteria were more sensitive to the ethanolic
extracts of both plants.
Key
words: Nauclea latifolia, Daniella oliveri,
phytochemical, antibacterial properties,
gram positive
bacteria. |
