中國水產(chǎn)門戶網(wǎng)報道

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病原已被證實 
　　 
　2013年5月1日-全球水產(chǎn)養(yǎng)殖聯(lián)盟（GAA）在周三宣布，亞利桑那大學研究團隊經(jīng)過數(shù)月的調查研究，發(fā)現(xiàn)了導致早期死亡綜合癥（EMS）的病原體。 
　　 
　　研究人員發(fā)現(xiàn)，EMS的病原體是一種細菌。該菌通過口頭傳播，寄生在蝦消化道，并產(chǎn)生毒素。這種毒素能夠引起組織的破壞和肝胰腺（蝦的消化器官）功能紊亂，但不會影響人類。 
　　 
　　GAA說研究團隊將繼續(xù)致力于開發(fā)快速檢測EMS/AHPNS病原體的方法，從而提高孵化場和養(yǎng)殖場的對該病的管理能力，進而找到長期的解決方案。同時，這種快速的檢測方法也將有利于受EMS影響國家生產(chǎn)的冷凍蝦或其他相關產(chǎn)品更好地通過出口的相關的風險評估。 
　　 
　　有些國家已經(jīng)實施了限制從受EMS影響的國家進口的冷凍蝦或其他產(chǎn)品的政策。但研究表明，冷凍蝦可能對野生蝦或環(huán)境的污染影響不大，因為EMS感染的蝦通常都非常小，不會進入國際貿易。此外，研究組反復嘗試使用含菌冷凍組織感染健康個體的實驗也均告失敗。 
　　 
　　EMS是2009年在中國首次報道，現(xiàn)在已經(jīng)蔓延到越南，馬來西亞和泰國，每年造成的損失超過10億美元。EMS通常暴發(fā)在養(yǎng)殖時間不超過30天的蝦塘里，死亡率超過70％�！　�