Preliminary Investigation and Phylogenetic Analysis of Red Sea Bream Iridoviral Disease(RSIVD)in Some Coastal Areas of Fujian Province

To investigate the infection of red sea bream iridoviral disease (RSIVD) , 25batches of fish collected from coasta1areas of Fujian Province were examined by PCR method, the positive amplified fragments and MCP gene of positive virus strains were sequenced and matched with the reported Iridoviridae MCP gene in Genbank.The result showed that two RSIVD strains was detected in samples from large yellow croaker and hapalogenys nitens respectively, which were named RISV-FJ-DHY and RISV-FJ-XDZD and found belonging to Megalocytivirus genus of Iridoviridae.Mutations were found in RISV-FJ-DHY and the strains isolated from large yellow croaker in 2002, while RISV-FJ-XDZD was genetically stable.