Abstract
Mangroves are known as perennial plants that thrive and adapt in tropical coastal areas affected by tidal cycles. Mangroves serve ecological functions such as protecting the coast from wind, currents, and sea waves. Besides its ecological functions, mangrove leaf known well has an activity as antibacterial. The objective of this study was to determine the yield, phytochemical component contained and antibacterial strength of Avicennia officinalis leaf extract, originating from Ambon Bay against Staphylococcus aureus and Escherichia coli. The result showed that Avicennia officinalis leave extracts methanol extract generated an inhibition zone 14.97±0.41 mm against Staphylococcus aureus and 12.01±0.06 mm against Escherichia coli. Methanol solvent exhibits the highest antibacterial activity against Staphylococcus aureus, followed by ethyl acetate and n-hexane extracts. However, Escherichia coli showed more resistance to the Avicennia officinalis leaf extract.
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