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The genus is distinguished on the basis of genetic characters. The known anativiruses lack a functional 2A protein.
No details are available on the morphology of the virions.
Genome: (Tseng and Tsai 2007, Pankovics et al., 2012, Boros et al., 2016) (J.G. Morgan, S. Bullman, B. Lucey, unpublished) 8,159–8,226 nt (5′-UTR: up to 425 nt; ORF: 7,446–7,563 nt; 3′-UTR: 219–238 nt). The location of the cre has not been identified.
The deduced polyprotein is of 2,482–2,521 amino acids. The predicted leader polypeptide of duck picornavirus is the longest known at 451 aa and suspected to be a trypsin-like protease. The L/VP0 cleavage and presence of a potential myristoylation site on VP0 is predicted for duck picornavirus (kQ/GqvqS) The 2A region is largely deleted with a residual 6 aa remaining.
Duck picornavirus was isolated from intestinal tracts of duckling with duck virus hepatitis (Boros et al., 2016). The virus, however, could not produce hemorrhagic lesions in the liver and causes a less fatal disease. RNA of members of Anativirus B has been detected in faecal samples of quails and in cloacal swabs and caecum samples of chickens. Two types of Anativirus B are distinguished namely phacovirus and chicken picornavirus (both anativirus B1) and quail picornavirus (anativirus B2).
Anativirus: from Anatidae, the family of birds that includes ducks, geese and swans.
Members of a species of the genus Anativirus:
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