Table 1. Characteristics of the family Hepeviridae.

Typical member:	human hepatitis E virus Burma (M73218), species Orthohepevirus A, genus Orthohepevirus
Virion	Non-enveloped, 27–34 nm diameter with a single capsid protein
Genome	6.4–7.2 kb capped positive-sense monopartite RNA containing three ORFs
Replication	Occurs in association with the host endoplasmic reticulum
Translation	From genomic (ORF1) and a subgenomic (ORF2 and ORF3) capped mRNA
Host range	Mammals (Orthohepevirus A, C and D), birds (Orthohepevirus B) and trout (Piscihepevirus)
Taxonomy	Two genera