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October 27, 2013

India

Does India Have EMS?

 

On October 26, 2013, this discussion took place on The Shrimp List, a mailing list for shrimp farmers:

 

Raju G.S.G. (govindaraju.gs@gmail.com): Dear Members, I’ve come across many Indian farmers who are losing their crops at 5-8 grams, within 45 days of stocking.  I’ll upload some photos of moribund shrimp to the list later.  Please post information about EMS and its clinical symptoms.  Looking for discussion on EMS.

 

Daniel Gruenberg (daniel@sureerathprawns.com): Raju, for the past two months, I have been hearing rumors through the grapevine that a disease that resembles EMS is becoming prevalent on Indian farms. I have hesitated to post anything to the list about it for the fear of spreading unnecessary panic, but I think the issue is becoming large enough that it should be confronted in the open.

 

At my farm, the expression of EMS in Penaeus monodon was a bit different than it was in P. vannamei.  In monodon, the hepatopancreas (HP) appears pale and the intestines are empty except for sloughed off tubule cells from the HP.  There is reduced feeding and high mortality.

 

Suspected cases should be preserved in Davidson’s solution and sent to Dr. Timothy Flegel (sctwf@mahidol.ac.th) for definitive examination.  Also, you may wish to send samples to Dr. Donald Lightner’s lab for PCR testing.

 

Loc Tran (thuuloc@email.arizona.edu): Dear Govindaraju, copy and past the following URL into the address bar or your web browser for a description of the gross signs of EMS:

 

http://pdf.gaalliance.org/pdf/GAA-Tran-July13.pdf

 

Source: The Shrimp List (a mailing list for shrimp farmers).  Subject: EMS Clinical Signs.  October 26, 2013.

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