Phylogenetic analyses conducted on isolates of rabbit hemorrhagic disease virus (RHDV) from throughout the world have shown well-defined genogroups comprising representative strains of the virus and antigenic variants. In this work, we have isolated and characterized RHDV from the major epizootic that occurred in Cuba in 2004-2005. Sequence analysis of the capsid protein gene and antigenic characterization of this strain has allowed its inclusion as a member of the distinct RHDVa subtype. We also found that specific antibodies directed against RHDV reference strains bound to the Cuban isolate in a competition ELISA and inhibited virus hemagglutination in vitro. This is the second report on the molecular characterization of RHDVa circulating in the American region.

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