The Effect of Kersen Fruit Extract (Muntingia calabura) Addition to The Yogurt Antibacterial Activity on Escherichia coli

Background: Yogurt, completed with lactic acid bacteria, can inhibit the growth of Escherichia coli. The flavonoids, tannin, and saponin Muntingia calabura L. plant showed antibacterial activity. present study aims to observe effect addition fruit extract yogurt on activity Objectives: was an experimental treatment infusion various concentrations (12.5 %, 25%, 50%, 75%, 100% three times replications) cow-milk-based yogurt. Material Methods: staining reagents were used for phytochemical screening. Mixed Yogurt (MMY) then centrifuged obtain supernatant. tested using disc diffusion method by observing diameter inhibition zone. Plain negative control Cefotaxime positive control. Results: In extract, steroid, phenol, have been observed. MMY toward E. coli as indicated zones 5.03± 2.66 mm, 4.95± 0.39 5.68± 0.84 8.02± 1.45 15.73± 1.60 mm concentration 12.5 100%, respectively. zone 3.95 while 45.60 mm. Conclusions: fruits extracts at 75% could bacteria categorized medium strong inhibitory,