Astroviridae

Astroviridae
As·tro·vi·ri·dae (as″tro-virґĭ-de) the astroviruses; a family of RNA viruses having a nonenveloped spherical virion 28–30 nm in diameter with a characteristic star-shaped outline. The genome consists of a single molecule of polyadenylated positive-sense single-stranded RNA (size 6.8–7.9 kb). Viruses contain four structural proteins and are chloroform-resistant. Infection is host restricted and transmission is by the fecal-oral route. There is a single genus, Astrovirus.

Medical dictionary. 2011.

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