UJI DAYA HAMBAT EKSTRAK DAUN SALAM ( Syzygium polyanthum [Wight] Walp) TERHADAP PERTUMBUHAN BAKTERI Escherichia Coli

Abstract

Escherichia coli is a bacterium that acts as a normal flora in the human body. If it exceeds a certain limit, both of these bacteria can become pathogens. The laurel leaves have an active substance with antibacterial effects ie: tannins, flavonoids, essential oils, and al kaloids. The purpose of this study was to determine the inhibitory power of leaf extract of salam on the growth of Escherichia coli . The type of this research is laboratory experiment with diffusion method of kirby odor disc. Inhibitory power is obtained b ased on the measurement of drag zones formed around the disc paper using the sliding term. The experiment was done three times repetition with positive control that is antibotics ciprofloxaxin and negative control of aquadest and got average result at 25 % concentration that is 14 mm, at concentration 50 % that is 16 mg, and concentration 75 % ie 20 mm. While on the positive control in obtaining the average result of inhibitory power is 31 mm and on negative control 0 mm. The results of the inhibitory test of bay leaves extract (Syzygium polyanthum [Wight] Walp ) against Escherichia col i bacteria were smaller than positive control (Ciprofloxaxin).