Medicinal plant are still major parts of traditional medicinal
systems in developing countries many infectious disease are
known to be treated with herbal remedies throughout the history
of mankind. Even today plant materials continue to play
a major role in primary health care as therapeutic remedies
in many developing countries (Sukanya et al., 2009). Medicinal
plants which from the backbone of traditional medicine
have in the last few decades been the subject of very intense
pharmacological studies. Human infections particularly those
involving microorganisms i.e. bacteria, fungi, viruses, nematodes
cause serious damages in tropical and subtropical countries
of the world (Gupta et al., 2009). The medicinal value of
these plants lies in some chemical active substances that produce
a definite physiological action on the human body. The
most important of these bioactive constituents of plants are
alkaloids, tannin, flavonoid and phenolic compounds (Edeoga
et al., 2005).