Family: Picornaviridae
Genus: Orivirus
Distinguishing features
The genus is distinguished on the basis of genetic characters.
Virion
Morphology
No details are available on the morphology of virions.
Nucleic acid
Genome (Boros et al., 2014a, Boros et al., 2016): 7,037 nt (5′-UTR: 734 nt; ORF: 5,925 nt; 3′-UTR: 376 nt). The location of the cre has not been identified.
Genome organization and replication
Genome layout:
VPg+5′-UTRIRES-II-[1AB-1C-1D/2A-2B-2C/3A-3B-3C-3D]-3′-UTR-poly(A)
The deduced polyprotein is of 1,975 amino acids. There is no L protein. The 1AB protein remains uncleaved. The function of the 2A protein is unknown.
Biology
No virus has been isolated. Viral RNA was detected in cloacal samples of diseased chickens in Hungary. Two genetic types are distinguished by means of phylogenetic analysis.
Derivation of names
Orivirus-: from Orosháza (town in Hungary where the cloacal sample was taken)
Species demarcation criteria
There is only a single species in the genus.