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Article Abstract
In recent years, diseases caused by infectious precocious virus (IPV) or decapod iridescent virus 1 (DIV1) have resulted in significant losses to the giant freshwater prawn (Macrobrachium rosenbergii) industry, threatening sustainable aquaculture development of this species. Co-infection with these two viruses was found in farmed prawns. This study investigated the biological characteristics of co-infection in M. rosenbergii through artificial infection with IPV and DIV1. The clinical signs of prawns co-infected with both viruses were observed, histopathological analysis, RT-qPCR or qPCR and in situ hybridization or in situ DIG-labeling-loop-mediated DNA amplification experiments to confirm the co-infection in prawns. The results showed that infection with DIV1 in M. rosenbergii was suppressed by infection with IPV in the co-infection group with a significant lower mortality, weaker histopathological changes, and reduced DIV1 loading compared with prawns only infected with DIV1. This study offers valuable insights for the prevention and control of these dual diseases.
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