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The genus is distinguished on the basis of genetic characters.
No details are available on the morphology of virions.
Genome (Woo et al., 2010, Pankovics et al., 2018): up to 9,130 nt (5′-UTR: c. 807 nt; ORF: 7,287–8,004 nt; 3′-UTR: 319–334 nt). The location of the cre has not been identified.
The deduced polyprotein is of 2,428 aa (passerivirus A1) and 2,668 aa (passerivirus B1), respectively. There is a long L protein of unknown function. The 1AB protein (with myristoylation signal) remains uncleaved. The 2A protein has an H-box/NC sequence motif.
No virus has been isolated. Viral RNA was detected in faeces of thrushes (Turdus hortulorum, T. merula, T. pallidus) and diseased home-reared estrildid finches (Uraeginthus sp.).
Passerivirus: from the order Passeriformes (perching birds), from Latin passer, 'sparrow'
Members of a species of genus Passerivirus:
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