Edwardsiella tarda (Paracolobactrum anguillimortiferum) Associated with Pond-Cultured Eel Disease

Abstract

Eight crystalline substances were isolated from a methanol extract of the red marine alga, Odonthalia corymbifera, and investigated by ultraviolet absorption, infrared spectros-copy, nuclear magnetic resonance, mass spectrometry and chemical methods. Three of them were identified as 2,3-dibromo-4,5-dihydroxybenzyl methyl ether, 2,3-dibromo-4,5-dihydroxybenzyl alcohol and 2,3-dibromobenzyl alcohol 4,5-disulfate dipotassium salt respectively. Another three compounds were shown to be L-phenylalanine, cholesterol and palmitic acid. The remaining two compounds were a tetrabromophenol CigHgC^Bn m.p. (decomp.) 184-186° and carboxylic acid C7H806 m.p. 132-134°. Elucidation of the structures of the latter two compounds is now in progress. © 1973, The Japanese Society of Fisheries Science. All rights reserved.