A new diagnostic tool that can detect a range of aquatic pathogens, including DIV-1, between two and four weeks before clinical signs are apparent to shrimp farmers, has recently been launched by Genics.
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Shrimp MultiPath Xtra is our new state-of-the-art early warning system scanning for 14 pathogens of commercial significance. Xtra enjoys all the data innovation found in the original Shrimp MultiPath (13 pathogens) with the much anticipated addition of Decapod iridescent virus 1, DIV-1.
Decapod Iridescent Virus 1 (DIV1) is a recently emerged infectious agent causing high mortality in Penaeus vannamei. DIV1 can affect late-postlarvae, juvenile and subadult shrimp, mainly during low temperature seasons. The very recent emergence of the virus has not allowed sufficient research to link external effects such as environmental, nutritional, physiological or pathological stressors to influence the susceptibility and level of mortality of the viral disease. The main target organs for DIV1 infections are hematopoietic tissue, gills and hepatopancreatic sinuses. High mortality of up to 80% has been reportedin farmed P. vannamei.
DIV1 virus has additionally been detected in wild specimens of P. monodon caught in the Indian Ocean, and it is therefore highly recommended to screen every batch of wild-caught P. monodon broodstock destined for use in commercial shrimp aquaculture facilities for DIV1 viral load by molecular based tests like PCR.
The Shrimp MultiPath Xtra PCR test will help to confirm DIV1 infections as well as provide information to producers about presence and/or absence of this virus and other shrimp pathogens frequent in culture systems, in a precise, reliable and quantitative way (number of pathogens per sample).
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