Screening of Plant Extracts for Antipasteurellosis Effect

摘要

Phytochemical analysis and acute toxicity studies of aqueous leaf extracts of Syzigium, cumini, Polyalthia longifolia and ace tonic leaf extract of Polyalthia longifolia were carried oat. Alkaloids, phenolic compounds, tannins, diterpenes and saponinswere revealed in the phytochemical screening of aqueous extract of Syzigium cumini whereas steroids, phenolic compounds, tannins, flavonoids, triterpenes and saponins were observed in the phytochemical screening of aqueous extract of Polyalthia longifolia leaves. Phytochemical analysis of the acetonic extract of Polyalthia longifolia leaves showed the presenceof flavonoids. The acute oral toxicity study presents the non-toxic effect of the aqueous extracts of Syzigium cumini, Polyalthia longifolja leaves and acetonic extract of Polyalthia longifolia leaves in rats and also revealed that the LD_(50) of these plant extracts were more than 5000 mg/kg.