Antimicrobial Evaluation of Sequentially extracted Leaf of Vernonia auriculifera Hiern (Rejicho)

Résumé

Abstract Background: Though there are reports about V. auriculifera antimicrobial activity, there is not enough information about its activity on some of the bacterial and fungal species. Besides, there was no quantitative evaluation done for phytochemicals previously. Therefore, the main purpose of this research work is to evaluate the antimicrobial activity and quantitative evaluation of the phenol and flavonoid contents V. auriculifera. Objectives: The objective of this study was to conduct the antimicrobial and quantitative evaluation of a sequentially extracted leaf of Vernonia auriculifera Hiern. Methods: The leave samples of Vernonia auriculifera were collected from Hawassa Zuria woreda, Sidama region of Ethiopia. The collected leaves of the plant were cleaned with tap water and air-dried. Then, it was coarsely powdered by mortar and pestle. The extractive value of the leaf part of the plant was determined in different solvents. The grounded leaf product was subsequently extracted by hexane, chloroform, and methanol in maceration conical flasks. The phytochemical screening was done for each extract. Then the total phenol and total flavonoid content in each extract were determined. Standard strains of bacterial and fungal species were used to assess the antibacterial, antifungal susceptibility test and to determine the minimum inhibitory concentration of crude extract. Result: Extraction yield for hexane, chloroform, and methanol was 0.6±0.05%, 1.7±0.02%, and 3.3±0.01% respectively. Phytochemical screening has shown the presence of multiple constituents. The TLC analysis depicted the presence of a different number of constituents in three extracts. The total phenolic content of methanol extract was 72.998 ± 0.002 mg GAE /g. The total flavonoid content of hexane and chloroform extracts were 2.59 ± 0.004 mg QE/g and 9.6 ± 0.02 mg QE/g respectively. The antimicrobial activity test showed the chloroform extract was the most active against all test microorganisms. Conclusion: This study has shown the activity of V. auriculifera against selected microorganisms of study. This plant could be used as a crude drug to treat infection caused by these pathogenic microorganisms. It had enough phenol and flavonoid amount that made V. auriculifera exhibit its biological activity.

Citer ce document

Accès au document

Ce document est hébergé sur son dépôt institutionnel d'origine.

Auteur(s)

Statistiques

Consultations : 1

Téléchargements : 0