RESEARCH SOME OF CHARACTERISTICS OF VIBRIO PARAHAEMOLYTICUS WHICH CAUSES EMS DISEASE ON JUVENILE SHRIMP AT DIEN HUONG COMMUNITY, PHONG DIEN DISTRICT, THUA THIEN HUE PROVINCE

Abstract

Early mortality syndrome has damaged largely for both output and profits in aquaculture. According to Lightner (2012) [9], the main cause of early mortality syndrome is caused by genes stick on Vibrio parahaemolyticus which produce toxins maked liver pancreatic atrophy and die. The research team found that EMS was caused by a single strain of a bacterial species common - Vibrio parahaemolyticus. The bacteria are transmitted orally, then it enters the digestive tract of shrimp, creating toxins that destroys tissue, causing dysfunction of liver and pancreatic digestive organs. World scientific community has had to distinguish  hundreds of different lines of Vibrio parahaemolyticus, however, only a minority of virulent strains which caused disease EMS on shrimp (Loc Tran et al., 2013) [7], but if the presence of more bacteria and high density will surely cause disease and even lethal to aquatic animals. Therefore, finding the causes as well as measuring to limit the Vibrio parahaemolyticus bacteria that caused disease in the pond is essential.

Keywords: EMS - early mortality syndrome, Vibrio parahaemolyticus