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has been cited by the following article:

• TITLE: Evaluation of the Efficacy of Albizia zygia Extracts on Bacterial Inhibition in Aquatic Microcosm

  AUTHORS: Yves Yogne Poutoum, Luciane Marlyse Moungang, Blandine Pulcherie Tamatcho Kweyang, Thierry Youmbi Fonkui, Golda Reine Zame Meva’a, Aurélie Dzenga Njeunkam, Mouhama Sani Adams Ibn Rabiou, Moïse Nola

  KEYWORDS: Albizia zygia Extract, Phytochemical Screening, Bacterial Inhibition, Aquatic Microcosms

  JOURNAL NAME: Journal of Geoscience and Environment Protection, Vol.11 No.7, July 31, 2023

  ABSTRACT: The objective of this study is the phytochemical analysis and the determination of the antibacterial activity of aqueous and hydro-ethanolic extracts obtained from the leaves and bark of the trunk of Albizia zygia, against Escherichia coli and Salmonella typhi bacteria in aquatic microcosms. Phytochemical screening was performed as described by Pareck. The results obtained show that the hydro-ethanolic and aqueous extracts of Albizia zygia trunk bark recorded higher extraction yields (26.71% and 33.2% respectively) compared to the aqueous and hydro-ethanolic extracts of leaves of the same plant. Secondary metabolites with antibacterial activities such as anthraquinones, anthocyanins, flavonoids, polyphenols, tannins and saponins were found in both types of extracts. Flavonoids and anthocyanins were relatively more abundant than the other chemical constituents. The highest cellular inhibition rate of Escherichia coli was 99.88%, obtained after 9 hours of exposure in the hydro-ethanolic extract solution of trunk bark at the concentration 1.5 g/L. The Salmonella typhi rate was 99.95% after 9 hours of exposure of bacterial cells to the hydro-ethanol extract of the bark of the trunk at the concentration 1.5 g/L. This rate increased proportionally with the bacterial-extract contact time. The temperature of the medium did not significantly influence bacterial inhibition (P > 0.05). The obtained results justify the use of the plant Albizia zygia in the reduction of the flow of bacterio-pollutants contained in water intended for consumption.