CULTURAL-CHARACTERISTICS OF THE BACTERIUM CAUSING JAUNDICE OF YELLOWTAIL, SERIOLA-QUINQUERADIATA

The present investigation was conducted to determine optimal cultural conditions of the causative bacterium of jaundice in yellowtail. This microorganism grew in L-15 medium, Eagle MEM, 0.85% NaCl solution and 1/3 sea water, each supplemented with 10% of fetal bovine serum (FBS). FBS was essential for growth of the bacterium. The bacterium did not grow in any other media usually used for bacterial isolation or culture. The optimal growth conditions for culture of the agent causing jaundice determined from this study are at temperature of 23-26-degrees-C using L-15 medium at pH 7.0-7.5 supplemented with more than 10% of FBS and 1.6-2.0% of NaCl.