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All Journal Journal of Aquaculture and Fish Health
Titik Dwi Sulistyawati
Master of Aquaculture Study Program, Faculty of Fisheries and Marine, Brawijaya University, Jl. Veteran, Ketawanggede, Lowokwaru, Malang City, East Java. 64145, Indonesia
Agriculture, Biological Sciences & Forestry

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Antibacterial Activity of Red Galangal (A. purpurata) Extract on the Growth of E. tarda Bacteria Desy Amalia Hidayati; Arief Prajitno; Titik Dwi Sulistyawati; Giri Pratama; Tania Nilakandhi
Journal of Aquaculture and Fish Health Vol. 12 No. 1 (2023): JAFH Vol. 12 No. 1 February 2023
Publisher : Department of Aquaculture

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jafh.v12i1.37056

Abstract

This study aimed to analyze the antibacterial activity of red galangal extract (Alpinia purpurata) against the growth of E. tarda. This aims of this study was to determine the antibacterial compounds and the antibacterial effectiveness of red galangal extract (A. purpurata) against the growth of E. tarda bacteria. Antibacterial activity test was carried out by MIC test and disc test. The MIC test used doses of 1 ppm, 10 ppm, 100 ppm, 500 ppm, and 1000 ppm with incubation for 24 hours. The disc test used doses of 100 ppm, 200 ppm, 300 ppm, 400 ppm, 500 ppm and a positive control of 5 ppm chloramphenicol and a negative control without treatment. Photochemical test of red galangal extract (A. purpurata) contains flavonoid compounds, alkaloids, tannins, triterpenoids, and saponins. The results of the disc test showed that the highest inhibitory diameter was 7.55 mm at a dose of 500 ppm and was bacteriostatic because it decreased its inhibitory zone after 48 hours of incubation. The highest inhibitory effectiveness was 56.56% at a dose of 500 ppm after 24 hours of incubation.
Co-Authors Arief Prajitno Desy Amalia Hidayati Giri Pratama Tania Nilakandhi