Antimicrobial Activities Of Tannins Extract From Guava Leaves Psidium Guajava L On Pathogens Microbial

Abstract This study aims to determine the antimicrobial activities of tannin extracts from guava leaves against pathogens microbial. The method used for qualitative analysis with the tannins are formed by the intensity of the color is blackish green FeCl3 compounds. In the quantitative analysis of tannins used variations of organic solvent ethanol with a concentration of 30 50 70 . Levels of tannins in the sample solution was calculated with Tannates Acid Equivalent EAT . Test of antimicrobial activities using diffusion agar method. The results showed levels of tannins in leaves of guava with ethanol 30 the which is 2.351 mg g ethanol 50 is 1.728 mg g ethanol 70 is 1.835 mg g. The best solvent to extract the highest levels of tannins with ethanol 30 by value of tannin levels 2.351mg g. Tannin inhibitory activity on five different pathogens microbial. This is because the composition of the cell wall of the microbe fifth different. The results showed that the tannins extracts can inhibit the growth of Escherichia coliPseudomonas aureginosa Staphilococcus aureus Aspergillus niger and Candida albicans.