Paramyxoviridae

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(virology) A family of negative-strand ribonucleic acid (RNA) viruses characterized by an enveloped spherical virion containing a single-stranded, nonfragmented molecule of RNA, contains the genera Paramyxovirus (sendai, mumps), Morbillivirus (measles), and Pneumovirus (respiratory syncytial virus).

One of the major ribonucleic acid virus families, to which the measles, mumps, parainfluenza, and respiratory syncytial viruses belong. Viruses in this family have a single-stranded, nonsegmented, linear molecular structure with helical symmetry.

A family of RNA-containing viruses similar in morphology to the influenza viruses.

A family of viruses in the order Mononegavirales containing two subfamilies, Paramyxovirinae and Pneumovirinae. Paramyxovirinae comprises five genera: Respirovirus, which includes paramyxoviruses of humans, cattle, dogs and various avian species (avian paramyxoviruses 2–9); Morbillivirus, which includes measles, canine distemper, and rinderpest; Rubulavirus, which includes mumps and a pig rubulavirus; Henipavirus, which includes Hendra and Nipah viruses; Avulavirus, which includes Newcastle disease virus. Pneumovirinae comprises the genera Pneumovirus, which includes respiratory syncytial viruses of humans, cattle, sheep and cats, and the genus Metapneumovirus, which includes turkey rhinotracheitis virus. Viruses in the family are large (180 nm diameter) enveloped and contain a genome that is a single molecule of single-stranded negative sense RNA.