Abstract
The red swamp crayfish (Procambarus clarkii) is the second most widely cultured crustacean globally. As a highly invasive species with a worldwide distribution, P. clarkii presents a substantial risk for the transmission of viral pathogens to native aquatic organisms. Recently, the emergence of growth retardation disease (GRD) in P. clarkii has led to significant production declines and economic losses. A comprehensive viromic analysis could offer valuable insights into the potential viral pathogens harbored by P. clarkii. Here we systematically examined the RNA viromes of healthy and GRD-affected P. clarkii collected from Qianjiang, China. Our investigation identified a total of 1,729 viral species across 21 known viral taxa, with 1,603 species being previously unreported. The orders Picornavirales, Tolivirales, and Nodamuvirales were predominant in both species count and relative abundance. Moreover, seven viruses exhibited higher abundance in GRD-affected P. clarkii compared to healthy individuals. Our work uncovers an unexpectedly diverse RNA viral community within P. clarkii and identifies potential viral pathogens associated with GRD in this species.
Published Version
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