Widespread bacterial resistance has led to more difficult to treat infectious diseases with available antibiotics. Therefore, new antibiotics are needed face of the growing antibiotic resistance. Swietenia mahagoni (L.) Jacq. is one of potential medicinal plants as a source new antibiotics. Five compounds have been isolated from an ethanolic extract of S. mahagoni (L.) Jacq., however its antimicrobial activity has not been investigated, yet. This study was conducted to evaluate the antimicrobial activity of these compounds. Minimal Inhibitory Concentration (MIC) and Minimal Bactericidal Concentration (MBC) were determined against Staphylococcus aureus and Pseudomonas aeruginosa strains. Among five compounds tested, compound 3 (3,4,5,6,7-pentaethyl-1-methoxy-1H-indazole) and compound 4 (5-ethyl-6-methoxymethyl-2-methyl-1,2-dihydropyridine) were found to be active against the bactrial strains tested with the MICs and MBCs values ranged from 50 to 100 μg/mL. In conclusion, among five compounds isolated from S. mahagoni (L.) Jacq., compound 3 and 4 showed moderate antimicrobial activity against S. aureus and P. aeruginosa strains.
ABSTRAKPenyebaran secara luas resistensi bakteri menyebabkan pengobatan penyakit infeksi menjadi lebih sulit dengan antibiotik yang tersedia. Adanya antibiotik baru dengan demikian diperlukan menghadapi penyebaran resistensi antibiotik tersebut. Swietenia mahagoni (L.) Jacq adalah salah satu tanaman obat yang potensial sebagai penghasil antibiotik baru. Lima senyawa telah diisolasi dari ekstrak etanol biji S. mahagoni (L) Jacq. namun demikian aktivitas antimikrobanya belum dikaji. Penelitian ini bertujuan untuk mengkaji aktivitas antimikroba ke lima senyawa hasil isolasi tersebut. Kadar Hambat Minimal (KHM) dan Kadar Bunuh Minimal (KBM) ditetapkan terhadap strain Staphylococcus aureus and Pseudomonas aeruginosa. Diantaran lima senyawa yang diuji, senyawa 3 (3,4,5,6,7-pentaetil-1-metoksi-1H-indazol) dan 4 (5-etil-6-metoksimetil-2-metil-1,2-dihidropiridin) aktif terhadap strain bakteri yang diuji dengan nilai KHM dan KBM antara 50 sampai 100 μg/mL. Dapat disimpulkan, diantaran lima senyawa yang diisolasi dari S. mahagoni (L.) Jacq. senyawa 3 dan 4 mempunyai aktivitas antimikroba moderat terhadap strain S. aureus and P. aeruginosa.