Table 1.

Characteristics of members of the family Paramyxoviridae

Typical member:	measles virus, Ichinose-B95a (AB016162), species Measles morbillivirus, genus Morbillivirus
Virion	Enveloped, pleomorphic (mostly spherical) virions with a diameter of 300–500 nm enclosing a ribonucleoprotein
Genome	Negative-sense, non-segmented RNA genomes of 14.6 to 20.1 kb
Replication	Cytoplasmic; the virus ribonucleoprotein complex replicates the antigenome and transcribes 6–8 positive-sense mRNAs
Translation	Cytoplasmic, by cellular machinery from capped and poly-adenylated mRNAs
Host range	Mammals, birds, fish and reptiles
Taxonomy	Realm Riboviria, phylum Negarnaviricota, class Monjiviricetes, order Mononegavirales. Several subfamilies, numerous genera and >70 species