Edwardsiella septicaemia infection or Edwardsiellosis is a mild to severe systemic disease of primarily warm water fishes
in the United States and Asia. The causative agent is Edwardsiella tarda. E. tarda is considered an important pathogen of fish and it has been isolated from a variety of
cultured foodfish and petfish. Edwardsiellosis is a recently described bacterial disease of cultured fish caused by E. tarda. E. tarda was first reported as the causative agent of disease in the Japanese eel and later in a variety of cultured fish of fresh and marine such as goldfish, rainbow trout, Chinook salmon, tilapia, mullet, crimson seabream and flounder. Random amplified polymorphic DNA (RAPD) is currently one of the methods of choice for genotypic analysis in many bacterial species. In this study, RAPD was utilized to elucidate the genome variation of 9 isolates of E. tarda isolates from clinical samples in Terengganu. Results showed that
genetic distance and percentage of similarity among the isolates in the present study were ranged from 0 to 0.87 and 13 % to 100 %, respectively.