Uji efektivitas ekstrak etanol kulit buah naga merah (Hylocereus polyrhizus) terhadap Staphylococcus aureus ATCC 25923 secara in vitro

Introduction: Infectious diseases are still one of the main causes of high morbidity and mortality in tropical Indonesia. One of the causes of this disease is the staphylococcus aureus bacteria. Red dragon fruit peel contains potentially antibacterial compounds such as flavonoid, alkaloid, saponin, tannin dan terpenoid. The purpose of this study is to determine the antibacterial activity of ethanolic extract of red dragon fruit peel against staphylococcus aureus ATCC 25923. Method: The method used is true experimental post test only control group design. The activity of ethanol extract of red dragon fruit skin was tested in various concentrations (25%, 50%, 75%, and 100%) against staphylococcus aureus ATCC 25923 by measuring the inhibition zone diameter and minimum inhibitory concentration (MIC). Keywords: Red dragon peel (hylovereus polyrhizus), ethanolic extract, inhibition zone, MIC, S.aureus