Arteriviridae is a family of enveloped, positive-strand RNA viruses in the order Nidovirales which infect vertebrates.

[1][2] Host organisms include equids, pigs, Possums, nonhuman primates, and rodents.

The family includes, for example, equine arteritis virus in horses which causes mild-to-severe respiratory disease and reproductive failure, porcine reproductive and respiratory syndrome virus type 1 and type 2 in pigs which causes a similar disease, simian hemorrhagic fever virus which causes a highly lethal fever, lactate dehydrogenase–elevating virus which affects mice, and wobbly possum disease virus.

[3][4] Member viruses are enveloped, spherical, and 45–60 nm in diameter.

[5] Arteriviruses have a positive-sense single-stranded RNA genome.