LIR Biotech , together with Genereach Biotechnology have launched a new nested PCR detection kit for prawn nodavirus, M. rosenbergii Nodavirus (MrNv) and P.vannamei Nodavirus (PvNv). Both are very important species cultured in the global aquaculture business.
MrNv , affects M. rosenbergii , the most important commercial freshwater prawn. Symptoms include lethargic PLs and appearance of opaque abdominal muscles. In serious infection, 100% mortality within 2-3 days after appearance of whitish muscles.
MrNv infected prawns showing white tail muscle disease.
PvNv was first noticed in 2004 when P.vannamei began to exhibit white or opaque lesions in tail muscles. The symptom is quite similar to IMNV but further research showed it was caused by nodavirus. PvNv is not known to cause high mortality but can cause up to 50% production reduction in affected farms.
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