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October 29, 2013


More on the EMS Situation from The Shrimp List


Padlab: ( Raju, you have really opened Pandora’s Box with your claim of suspected EMS in India.


It’s true that there have been mortalities in shrimp farms in India after the onset of rains, but the fact is that all sizes of shrimp have been affected, not necessarily just 5-to-8-gram shrimp as you claim.  Samples tested by PCR in a few of the farms have clearly shown that the outbreaks have been due to the whitespot virus.  Past experience indicates that the whitespot onslaught could continue till February 2014.  We do, however, need to be vigilant against mass mortalities that are negative for whitespot by PCR.  The best thing we can do is to inform government bodies like CIBA (Central Institute of Brakishwater Aquaculture) and RGCA (Rajiv Gandhi Center for Aquaculture) and assist them in collecting samples for histopathology/molecular diagnosis for EMS/AHPND.  RGCA is associated with the Dr. Lightner’s lab at the University of Arizona and therefore any suspected EMS cases could be quickly diagnosed.


While we are all concerned about EMS entering India, let us appreciate the fact that over the past eight months, there has been no movement of stocks from EMS countries into India.  The Government of India has complete control over the import of shrimp stocks from the West.


Let’s not provide fodder for rumor mongers!


Loc Tran ( I just want to let you know that I have found many cases in Vietnam in which WSSV and EMS were present in the same animals (especially during winter).


Daniel Gruenberg ( The existence of WSSV+PCR test is not enough to rule out EMS.  At our farm they showed up together in Penaeus monodon.


Source: The Shrimp List (a mailing list for shrimp farmers).  Subject: EMS Clinical Signs.  October 28, 2013.

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