Uji Daya Hambat Ekstrak Daun Lidah Mertua (Sansevieriae Trifasciata Folium) Terhadap Pertumbuhan Bakteri Escherichia Coli Dan Streptococcus SP

: Mother in law\u27s tongue plant has some active compounds inter alia saponin, polyphenol, and flavonoid that have antibacterial effects. This study aimed to identify whether the antibacterial effects of mother in law\u27s tongue leaf (Sansevieria Trifasciata) towards the growth of Escherichia coli and Streptococcus sp. This was an experimental laboratory study. The concentrations of mother in law\u27s tongue leaf extract were tested with well methods, as follows: 5%, 10%, 20%, and 40%. The results showed that this extract at concentration of 5%, 10%, 20%, and 40% could inhibit the growth of E. coli with the average diameters of inhibition zones as follows: 7.8 mm, 13 mm, 14.5 mm, and 17.3 mm meanwhile of Streptococcus sp. with the average diameters of inhibition zones, as follows: 4.6 mm, 9.6 mm, 13 mm, and 15.3 mm. Conclusion: Ethanol extract of mother in law\u27s tongue leaves (Sansevieria Trifasciata) has antibacterial activities against the growth of E. coli and Streptococcus sp. The higher the concentration is, the broader the inhibition zone is