Abstract
This study aimed to identify a symbiotic fungus strain HX-1 with anti-Vibrio harveyi activity and isolate and identify the active compound. The HX-1 strain was identified as Aspergillus fumigatus according to the morphological characteristics and internal transcribed spacer (ITS) sequence analysis. The compound was isolated from the fermentation product of HX-1 strain through ethyl acetate extraction, silica gel and Sephadex LH-20 column chromatography, and semi-preparative HPLC techniques using an antibacterial-guided fractionation method. According to its physicochemical properties and spectral characteristics, the compound was identified as trypacidin having the same anti-V. harveyi activity as streptomycin sulfate, with the minimum inhibitory concentration of 31.25µg/mL.
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