PCR was done in an MJ Research PTC200 thermal cycler and the products resolved on 1.2% agarose gel in Tris–boric acid/EDTA buffer with a constant voltage of 80 in parallel using standard markers. The PCR amplified DNA samples were purified using QIAquick gel extraction and PCR purification kits (Qiagen) followed by cloning in TA cloning vector (pTZ57RT – Fermentas) as per protocols indicated by respective manufacturers. The cloned column purified plasmid DNA samples were PCR amplified with gene specific as well as M13 primers to confirm the insert DNA in the vector and sequenced using M13 primers at Eurofins Genomics India Pvt. Ltd., Bangalore. The multiple sequence alignment and phylogenetic relationship of the Indian isolate of DNV-2 with Chinese and Japanese DNV-2 isolates were analyzed using ClustalW and MEGA 5.1 programs, respectively and accordingly grouped into clusters of sequences belonging to the same gene.