Genus: Lagovirus


Genus: Lagovirus

Distinguishing features

The strains in this genus form a distinct clade within the family Caliciviridae (Figure 4.Caliciviridae).

Virion

See discussion under family description.

Genome organization and replication 

See discussion under family description. The genome is organized into two ORFs. ORF1 encodes the non-structural polyprotein, with the major structural protein gene (VP1) in frame with the non-structural polyprotein coding sequence. The translated region of ORF2 overlaps ORF1 by 5 nt in the rabbit hemorrhagic disease virus (RHDV) genome and 5 nt in the European brown hare syndrome virus (EBHSV) genomes. ORF2 encodes a small protein (VP2) of unknown function that has been identified as a minor structural component in the RHDV virion.

Antigenicity

See discussion under family description.

Biology

Lagoviruses have characteristically been associated with infection in rabbits and hares (lagomorphs), and can cause epidemics with high mortality in these animals. There is no productive continuous cell culture system for lagoviruses but recently infection of a rabbit kidney cell line (RK-13) with a mutant RHDV has been reported (Zhu et al., 2017).

Species demarcation criteria

Lagoviruses are currently classified into two species, Rabbit hemorrhagic disease virus and European brown hare syndrome virus. However, based on phylogenetic relationships, a single species of lagovirus, tentatively called “Lagovirus europaeus”, has been proposed (Le Pendu et al., 2017). This proposed species is divided into two genogroups that correspond to RHDV- and EBHSV-related viruses (Wirblich et al., 1994). Genogroups were subdivided into genotypes, which could be further subdivided into phylogenetically well-supported variants (Le Pendu et al., 2017).

Member species

Exemplar isolate of the species
SpeciesVirus nameIsolateAccession numberRefSeq numberAvailable sequenceVirus Abbrev.
European brown hare syndrome virusEuropean brown hare syndrome virusGD/FR/1989Z69620NC_002615Complete genomeEBHSV
Rabbit hemorrhagic disease virusrabbit hemorrhagic disease virusGH/DE/1988M67473NC_001543Complete genomeRHDV

Virus names, the choice of exemplar isolates, and virus abbreviations, are not official ICTV designations.