GAA：EMS病原已被证实为细菌

中国水产门户网报道

GAA: Cause of EMS identified 
 

By SeafoodSource staff

 

　　01 May, 2013 - The Global Aquaculture Alliance on Wednesday announced after months of investigation by research team at the University of Arizona, the pathogen causing early mortality syndrome (EMS). 
 

 

　　The researchers found that EMS is caused by a bacterial agent, which is transmitted orally, colonizes the shrimp gastrointestinal tract and produces a toxin that causes tissue destruction and dysfunction of the shrimp digestive organ known as the hepatopancreas. It does not affect humans.
 

　　GAA said research continues on the development of diagnostic tests for rapid detection of the EMS/AHPNS pathogen that will enable improved management of hatcheries and ponds, and help lead to a long-term solution for the disease. It will also enable a better evaluation of risks associated with importation of frozen shrimp or other products from countries affected by EMS.
 

　　Some countries have implemented policies that restrict the importation of frozen shrimp or other products from EMS-affected countries. The researchers frozen shrimp likely pose a low risk for contamination of wild shrimp or the environment because EMS-infected shrimp are typically very small and do not enter international commerce. Also, repeated attempts to transmit the disease using frozen tissue were unsuccessful.
 

　　Since EMS was first reported in China in 2009, it has spread to Vietnam, Malaysia and Thailand, and now causes annual losses more than USD 1 billion. EMS outbreaks typically occur within the first 30 days after stocking a newly prepared shrimp pond, and mortality can exceed 70 percent.

　　 
　　GAA：EMS病原已被证实 
　　 
　2013年5月1日-全球水产养殖联盟（GAA）在周三宣布，亚利桑那大学研究团队经过数月的调查研究，发现了导致早期死亡综合症（EMS）的病原体。 
　　 
　　研究人员发现，EMS的病原体是一种细菌。该菌通过口头传播，寄生在虾消化道，并产生毒素。这种毒素能够引起组织的破坏和肝胰腺（虾的消化器官）功能紊乱，但不会影响人类。 
　　 
　　GAA说研究团队将继续致力于开发快速检测EMS/AHPNS病原体的方法，从而提高孵化场和养殖场的对该病的管理能力，进而找到长期的解决方案。同时，这种快速的检测方法也将有利于受EMS影响国家生产的冷冻虾或其他相关产品更好地通过出口的相关的风险评估。 
　　 
　　有些国家已经实施了限制从受EMS影响的国家进口的冷冻虾或其他产品的政策。但研究表明，冷冻虾可能对野生虾或环境的污染影响不大，因为EMS感染的虾通常都非常小，不会进入国际贸易。此外，研究组反复尝试使用含菌冷冻组织感染健康个体的实验也均告失败。 
　　 
　　EMS是2009年在中国首次报道，现在已经蔓延到越南，马来西亚和泰国，每年造成的损失超过10亿美元。EMS通常暴发在养殖时间不超过30天的虾塘里，死亡率超过70％。